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# MiniMax H3 Max

POST https://api.beatapi.io/v1/videos/tasks
Content-Type: application/json

Generate videos of 5 seconds or more at 480P or 768P from text or one or two frames, priced per second.- Asynchronous: the create call returns a task ID; the video arrives when the task succeeds.
- Three ways in: text only, a first frame, or a first and last frame. There are no reference inputs and no `aspect_ratio`.
- Two resolutions: 480P and 768P (the default), written in upper case.
- Billed per second of video at the rate of the chosen resolution; `duration` starts at 5 seconds. A failed task costs nothing.POST/v1/videos/tasksTry itOpens this model in the API Explorer. Enter your BeatAPI API key to create a task: the call is real and is billed to your own balance.## Model IDsFive MiniMax H3 models share this endpoint but not the same inputs. The values below come straight from the gateway contract.| Model ID               | `duration` (s) | `resolution`            | Max reference images | Max reference videos | Max reference audio | Choose it when                                                                                                                                                                             |
| ---------------------- | -------------- | ----------------------- | -------------------- | -------------------- | ------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| `minimax-h3`           | 4–15           | `768p`, `2K`            | 9                    | 3                    | 3                   | You already use the original ID. It has the same inputs and prices as `minimax-h3-fast`.                                                                                                   |
| `minimax-h3-fast`      | 4–15           | `768p`, `2K`            | 9                    | 3                    | 3                   | You want 2K output, or reference sets with audio and up to 3 reference videos.                                                                                                             |
| `minimax-h3-normal`    | 3–15           | `480p`, `768p`, `1080p` | 4                    | 1                    | —                   | Price matters most and you can wait longer: it renders more slowly at half the Fast rate for the same resolution, adds 480p and 1080p and a `seed`, and takes fewer references (no audio). |
| **`minimax-h3-max`**   | ≥ 5            | `480P`, `768P`          | —                    | —                    | —                   | You start from text or one or two frames, want 480P or 768P, and want a `seed`; it takes no reference inputs and no `aspect_ratio`.                                                        |
| `minimax-h3-max-turbo` | ≥ 5            | `480P`, `768P`          | —                    | —                    | —                   | Same inputs and resolutions as `minimax-h3-max` at half its list price.                                                                                                                    |## Endpoint and authentication`POST https://api.beatapi.io/v1/videos/tasks`Authorization
string
RequiredYour BeatAPI API key, sent as `Bearer <BEATAPI_API_KEY>`. Create keys in the [Dashboard](https://beatapi.io/dashboard). Keep keys on your server; never ship them in a browser or mobile app.Send the body as JSON with `Content-Type: application/json`. `Idempotency-Key` is optional: send a unique value (at most 255 characters) per logical request and reuse it only to retry that exact body. Within 24 hours a retry with the same key and body returns the first response again with `Idempotent-Replayed: true`; the same key with a different body returns `409 idempotency_conflict`. Responses other than 2xx are not stored, so a retry after a 400 or 402 runs again.## How a request works`POST` the parameters below to the endpoint. A `201` means the task was accepted and its price reserved from your balance; the work runs in the background. Save `data.id`.Call `GET /v1/tasks/{task_id}` and wait `data.poll_after_seconds` between calls (5 s for images, 8 s for videos) until `status` is `succeeded` or `failed`. Or register a [webhook](/webhooks) for `task.succeeded` and `task.failed`; keep polling as the fallback, because a task stopped by the processing timeout sends no event.On `succeeded`, download every `data.output.media[].url` and store the files you need; BeatAPI does not promise how long result URLs stay available. On `failed`, read `data.error_code` and `data.error_message`: the reserved amount was returned to your balance, and `data.retryable` says whether sending the same request again can succeed.## Input modes| Mode                 | Required inputs                       | Notes                                                 |
| -------------------- | ------------------------------------- | ----------------------------------------------------- |
| Text to video        | `model`, `prompt`                     | Send no `images`.                                     |
| First frame          | `model`, `prompt`, `images` (1 link)  | The video starts from the image.                      |
| First and last frame | `model`, `prompt`, `images` (2 links) | `images[0]` is the first frame, `images[1]` the last. |## Request parametersmodel
string
RequiredThe model to run.**Value**: `minimax-h3-max`**If the value is wrong**- Missing: `"model" is required`
- An image model sent to this endpoint: `"model" nano-banana-2 is served by POST /v1/images/tasks, not this endpoint`prompt
string
RequiredWhat happens in the shot: the motion, the expression, the camera and the style.**Length**: 1–5000 characters- Length is counted in characters (a CJK character counts as one).
- With frames, describe how the video gets from one to the other, or what moves after the first frame.**If the value is wrong**- Missing: `"prompt" is required`
- Empty or longer than the limit: `"prompt" has an unsupported length`images
string[]
OptionalA first frame, or a first and a last frame.**Items**: 1–2  \
Each item is a public `https://` URL. For a local file, [upload it first](/quick-guide#upload-an-input-file) with `POST /v1/files` and pass the returned `data.url`.- One link: the video starts from this image. Two links: `images[0]` is the first frame and `images[1]` the last.
- Reference images are not accepted on this model (`reference_images` is refused).**If the value is wrong**- More than two links: `"images" accepts at most 2 items`
- Not an https\:// link: `"images[0]" must be a public HTTPS URL`duration
integer
OptionalDefault: 5Length of the video in seconds, a whole number of at least 5.**Default**: `5`  \
**Range**: ≥ 5- If you leave it out, `5` is used.
- The price follows this value (see Billing).**If the value is wrong**- Below 5 seconds, or not a whole number: `"duration" is outside its supported range`resolution
string
OptionalDefault: 768POutput resolution. 768P costs more per second than 480P.**Allowed values**: `480P`, `768P`  \
**Default**: `768P`- Upper case only: `768p` is refused.
- 1080P and 2K are not offered here; `minimax-h3-normal` has 1080p and `minimax-h3-fast` has 2K.**If the value is wrong**- A value not in the list (for example `768p`, `1080P` or `2K`): `"resolution" must be one of: [480P 768P]`seed
integer
OptionalA fixed number to seed the generation. Leave it out for a random seed.**Range**: ≥ 0- A whole number of at least 0.**If the value is wrong**- Negative or not a whole number: `"seed" is outside its supported range`## Input media limitsThe gateway reads every input before the task is created and refuses one outside these limits with a `400 bad_request` that names the input. Nothing is charged.| Media  | Limits checked before the task is created                           |
| ------ | ------------------------------------------------------------------- |
| Images | width and height 256–5760 px; aspect ratio (width ÷ height) 0.4–2.5 |- Only images are accepted on this model, so only the image row applies; the video and audio rows are shared by the H3 models and do not apply here.
- Images are checked in the order you sent them. Limits are checked in the order sides, aspect ratio. The message names the input by list and position, counting from 0 like the field errors: `images[0] is 200x200 pixels; this model takes images 256 to 5760 pixels on each side.`
- A link is refused at create only when its host answers with an HTTP 4xx error or returns an empty file, for example `images[1] could not be downloaded: the URL returned HTTP 404.`; other problems with an input surface after submission and fail the task (refunded).
- Have a local file? Upload it with `POST /v1/files` and pass the returned `data.url`.## Fields this model does not acceptSending one of these is refused before anything is charged, instead of being ignored:- `aspect_ratio`, `reference_images`, `reference_videos`, `reference_audios`, `generate_audio`, `watermark`, `quality`, `sound` and any other field from other video models → `field "aspect_ratio" is not supported by model minimax-h3-max` (with the field you sent).
- Any other unknown field → `unknown field: <name>`.For reference inputs use `minimax-h3-fast` (images, videos and audio) or `minimax-h3-normal` (images and one video).## Request examples```bash title="cURL"
curl --request POST \
  --url https://api.beatapi.io/v1/videos/tasks \
  --header "Authorization: Bearer $BEATAPI_API_KEY" \
  --header 'Content-Type: application/json' \
  --data '{
  "model": "minimax-h3-max",
  "prompt": "A slow cinematic push through a misty mountain village at dawn, smoke rising from the chimneys",
  "duration": 5,
  "resolution": "768P"
}'
``````python title="Python"
import os
import requests

response = requests.post(
    "https://api.beatapi.io/v1/videos/tasks",
    headers={"Authorization": f"Bearer {os.environ['BEATAPI_API_KEY']}"},
    json={
      "model": "minimax-h3-max",
      "prompt": "A slow cinematic push through a misty mountain village at dawn, smoke rising from the chimneys",
      "duration": 5,
      "resolution": "768P"
    },
    timeout=60,
)
body = response.json()
if not response.ok:
    raise RuntimeError(f"{response.status_code} {body['error']['code']}: {body['error']['message']}")
task = body["data"]
print(task["id"], task["status"])
``````javascript title="JavaScript"
const response = await fetch('https://api.beatapi.io/v1/videos/tasks', {
  method: 'POST',
  headers: {
    Authorization: `Bearer ${process.env.BEATAPI_API_KEY}`,
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    "model": "minimax-h3-max",
    "prompt": "A slow cinematic push through a misty mountain village at dawn, smoke rising from the chimneys",
    "duration": 5,
    "resolution": "768P"
  }),
});
const body = await response.json();
if (!response.ok) throw new Error(`${response.status} ${body.error.code}: ${body.error.message}`);
console.log(body.data.id, body.data.status);
```### Text to videoA 5-second 768P clip.```bash
curl --request POST \
  --url https://api.beatapi.io/v1/videos/tasks \
  --header "Authorization: Bearer $BEATAPI_API_KEY" \
  --header 'Content-Type: application/json' \
  --data '{
  "model": "minimax-h3-max",
  "prompt": "A slow cinematic push through a misty mountain village at dawn, smoke rising from the chimneys",
  "duration": 5,
  "resolution": "768P"
}'
```### First frameThe video starts from the image.```bash
curl --request POST \
  --url https://api.beatapi.io/v1/videos/tasks \
  --header "Authorization: Bearer $BEATAPI_API_KEY" \
  --header 'Content-Type: application/json' \
  --data '{
  "model": "minimax-h3-max",
  "prompt": "The performer turns toward the camera as neon light sweeps across the stage",
  "images": [
    "https://media.beatapi.io/samples/neon-singer.png"
  ],
  "duration": 5,
  "resolution": "768P"
}'
```### First and last frameThe video moves from the first image to the second, at 480P with a fixed seed.```bash
curl --request POST \
  --url https://api.beatapi.io/v1/videos/tasks \
  --header "Authorization: Bearer $BEATAPI_API_KEY" \
  --header 'Content-Type: application/json' \
  --data '{
  "model": "minimax-h3-max",
  "prompt": "The camera moves smoothly from the bottle on the table to the singer on a neon stage in one continuous shot",
  "images": [
    "https://media.beatapi.io/samples/smart-bottle.png",
    "https://media.beatapi.io/samples/neon-singer.png"
  ],
  "duration": 6,
  "resolution": "480P",
  "seed": 42
}'
```## Responses### Create a task (201)The task object. `output` is `null` until the task succeeds. Fields marked “while running” disappear once the task finishes.```json
{
  "data": {
    "id": "task_7Qm2Xc9LpR4vT8sKa1Nf6YbH3eWdJ0uZ",
    "object": "task",
    "task_kind": "video",
    "capability_id": "minimax-h3-max",
    "capability_version": 1,
    "media_type": "video",
    "model": "minimax-h3-max",
    "status": "queued",
    "stage": "queued",
    "created_at": 1791993600,
    "updated_at": 1791993600,
    "completed_at": null,
    "poll_after_seconds": 8,
    "output": null,
    "usage": {
      "credits_reserved": 0.4,
      "credits_settled": 0,
      "credits_refunded": 0,
      "credits_charged": 0.4,
      "billable_duration_seconds": 5
    },
    "request_id": "req_5f0c2a9e4b7d4e31",
    "error_code": null,
    "error_message": null
  }
}
```| Field                                  | Type              | Description                                                                                                                              |
| -------------------------------------- | ----------------- | ---------------------------------------------------------------------------------------------------------------------------------------- |
| `data.id`                              | `string`          | Task ID: `task_` followed by 32 letters and digits. Use it to poll and to match webhook events.                                          |
| `data.object`                          | `string`          | Always `task`.                                                                                                                           |
| `data.task_kind`                       | `string`          | `image` or `video`.                                                                                                                      |
| `data.capability_id`                   | `string`          | The model ID you sent.                                                                                                                   |
| `data.capability_version`              | `integer`         | Contract version of the model, currently `1`.                                                                                            |
| `data.media_type`                      | `string`          | `image` or `video`.                                                                                                                      |
| `data.model`                           | `string`          | The model ID you sent (same as `capability_id`).                                                                                         |
| `data.status`                          | `string`          | `queued`, `processing`, `succeeded` or `failed`. Only the last two are final.                                                            |
| `data.stage`                           | `string`          | Repeats `status`; kept for older clients.                                                                                                |
| `data.created_at`                      | `integer`         | When the task was created, Unix seconds.                                                                                                 |
| `data.updated_at`                      | `integer`         | Last change, Unix seconds.                                                                                                               |
| `data.completed_at`                    | `integer \| null` | When the task finished, Unix seconds; `null` while it runs.                                                                              |
| `data.poll_after_seconds`              | `integer`         | While running: how long to wait before the next poll (5 for images, 8 for videos).                                                       |
| `data.typical_seconds`                 | `object`          | While running, when enough recent tasks exist: `p50` and `p90` completion times in seconds over the last `window`, from `samples` tasks. |
| `data.output`                          | `object \| null`  | The result; `null` until `status` is `succeeded`. See the output fields below.                                                           |
| `data.usage.credits_reserved`          | `number`          | USD held from your balance when the task was created.                                                                                    |
| `data.usage.credits_charged`           | `number`          | USD this task costs; `0` on a failed task.                                                                                               |
| `data.usage.credits_settled`           | `number`          | USD finally taken; set when the task succeeds, otherwise `0`.                                                                            |
| `data.usage.credits_refunded`          | `number`          | USD returned to your balance; equals the reservation on a failed task once the refund is recorded.                                       |
| `data.usage.billable_duration_seconds` | `integer`         | Video only: the seconds the price is based on. Absent when the model reports no duration.                                                |
| `data.request_id`                      | `string`          | Request ID. Include it when you contact support.                                                                                         |
| `data.error_code`                      | `string \| null`  | Failure code; `null` unless the task failed.                                                                                             |
| `data.error_message`                   | `string \| null`  | What went wrong and what to change; `null` unless the task failed.                                                                       |### Finished task`GET /v1/tasks/{task_id}` returns HTTP 200 with `status: "succeeded"` and the result in `data.output`.```json
{
  "data": {
    "id": "task_7Qm2Xc9LpR4vT8sKa1Nf6YbH3eWdJ0uZ",
    "object": "task",
    "task_kind": "video",
    "capability_id": "minimax-h3-max",
    "capability_version": 1,
    "media_type": "video",
    "model": "minimax-h3-max",
    "status": "succeeded",
    "stage": "succeeded",
    "created_at": 1791993600,
    "updated_at": 1791993690,
    "completed_at": 1791993690,
    "output": {
      "media": [
        {
          "type": "video",
          "url": "https://media.beatapi.io/outputs/task_7Qm2Xc9LpR4vT8sKa1Nf6YbH3eWdJ0uZ/0.mp4",
          "mime_type": "video/mp4"
        }
      ],
      "r2_url": "https://media.beatapi.io/outputs/task_7Qm2Xc9LpR4vT8sKa1Nf6YbH3eWdJ0uZ/0.mp4"
    },
    "usage": {
      "credits_reserved": 0.4,
      "credits_settled": 0.4,
      "credits_refunded": 0,
      "credits_charged": 0.4,
      "billable_duration_seconds": 5
    },
    "request_id": "req_5f0c2a9e4b7d4e31",
    "error_code": null,
    "error_message": null
  }
}
```#### Output fields| Field                      | Type       | Description                                                                            |
| -------------------------- | ---------- | -------------------------------------------------------------------------------------- |
| `output.media`             | `object[]` | The generated files; one video for this model.                                         |
| `output.media[].type`      | `string`   | Always `video`.                                                                        |
| `output.media[].url`       | `string`   | HTTPS link to the stored video. Download and keep it; no retention period is promised. |
| `output.media[].mime_type` | `string`   | The file type, for example `video/mp4`.                                                |
| `output.r2_url`            | `string`   | The video URL again, for older clients. Read `media` instead.                          |### Failed taskA failed task is still HTTP 200 on `GET /v1/tasks/{task_id}`: the failure is in the body. The reservation is returned in full, so nothing is charged.```json
{
  "data": {
    "id": "task_7Qm2Xc9LpR4vT8sKa1Nf6YbH3eWdJ0uZ",
    "object": "task",
    "task_kind": "video",
    "capability_id": "minimax-h3-max",
    "capability_version": 1,
    "media_type": "video",
    "model": "minimax-h3-max",
    "status": "failed",
    "stage": "failed",
    "created_at": 1791993600,
    "updated_at": 1791993690,
    "completed_at": 1791993690,
    "output": null,
    "usage": {
      "credits_reserved": 0.4,
      "credits_settled": 0,
      "credits_refunded": 0.4,
      "credits_charged": 0,
      "billable_duration_seconds": 5
    },
    "retryable": true,
    "request_id": "req_5f0c2a9e4b7d4e31",
    "error_code": "processing_failed",
    "error_message": "The task failed during processing on our side. Retry; a failed task is refunded."
  }
}
```| Field                | Type      | Description                                                                                                                                                                                                            |
| -------------------- | --------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `data.error_code`    | `string`  | One of `bad_request` and `content_policy_violation` (change the request) or `processing_unavailable`, `processing_timeout`, `processing_failed` and `result_transfer_failed` (try again later). See [Errors](/errors). |
| `data.error_message` | `string`  | A sentence that names the problem and the fix.                                                                                                                                                                         |
| `data.retryable`     | `boolean` | Present only on a failed task: `true` when the same request can succeed if you send it again.                                                                                                                          |
| `data.usage`         | `object`  | Once the refund is recorded (normally at the moment the task fails): `credits_charged` and `credits_settled` are `0`, and `credits_refunded` equals `credits_reserved`.                                                |## Complete exampleCreate a task, wait for it with the server’s polling hint, and print the result URLs. Set `BEATAPI_API_KEY` in your environment and install `requests`.```python
import os
import time
import uuid

import requests

API = "https://api.beatapi.io"
HEADERS = {"Authorization": f"Bearer {os.environ['BEATAPI_API_KEY']}"}


def create_task(body: dict) -> dict:
    # One Idempotency-Key per logical request: a retry with the same key cannot create a second task.
    headers = {**HEADERS, "Idempotency-Key": str(uuid.uuid4())}
    for attempt in range(3):
        response = requests.post(f"{API}/v1/videos/tasks", headers=headers, json=body, timeout=60)
        if response.status_code in (429, 503) and attempt < 2:
            time.sleep(int(response.headers.get("Retry-After", 10)))
            continue
        break
    try:
        payload = response.json()
    except ValueError:  # an edge error page is not JSON
        response.raise_for_status()
        raise
    if not response.ok:
        error = payload["error"]
        raise RuntimeError(f"{response.status_code} {error['code']}: {error['message']} (request_id={error.get('request_id')})")
    return payload["data"]


def wait_for_task(task_id: str, timeout_seconds: int = 1800) -> dict:
    deadline = time.monotonic() + timeout_seconds
    while time.monotonic() < deadline:
        response = requests.get(f"{API}/v1/tasks/{task_id}", headers=HEADERS, timeout=30)
        if response.status_code == 429 or response.status_code >= 500:
            time.sleep(int(response.headers.get("Retry-After", 10)))
            continue
        response.raise_for_status()
        task = response.json()["data"]
        if task["status"] in ("succeeded", "failed"):
            return task
        time.sleep(task.get("poll_after_seconds", 5))
    raise TimeoutError(f"task {task_id} is still running; keep polling later")


task = create_task({
  "model": "minimax-h3-max",
  "prompt": "A slow cinematic push through a misty mountain village at dawn, smoke rising from the chimneys",
  "duration": 5,
  "resolution": "768P"
})
print("created", task["id"])
task = wait_for_task(task["id"])
if task["status"] == "failed":
    raise SystemExit(f"{task['error_code']}: {task['error_message']}")
for item in task["output"]["media"]:
    print(item["url"])
```## Billing- Billed per second of video: the requested `duration` times the rate of the chosen resolution, which is about $0.05 per second at 480P and $0.08 per second at 768P. The list prices below are for 8 seconds.
- The same request on `minimax-h3-max-turbo` costs half as much.
- The number of frames and `seed` do not change the price.
- The price is reserved when the task is created; `usage.billable_duration_seconds` on the task shows the seconds billed.
- A failed task, including one refused by moderation after submission, is refunded in full.Current list prices, the same as on [Pricing](https://beatapi.io/pricing). An account with a negotiated discount pays less; `data.usage` on the task always shows the amount actually charged.| Option       | List price (USD) |
| ------------ | ---------------- |
| 8 sec · 480P | \$0.4            |
| 8 sec · 768P | \$0.64           |## Common errors| Error or symptom                                                    | Cause                                                                                                                       | Fix                                                                                  |
| ------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------ |
| 400 `"resolution" must be one of: [480P 768P]`                      | Lower case (`768p`), or `1080P` / `2K`: this model has two tiers, written in upper case.                                    | Send `480P` or `768P`.                                                               |
| 400 `"duration" is outside its supported range`                     | Less than 5, not a whole number, or sent as a string.                                                                       | Send an integer of 5 or more.                                                        |
| 400 `field "aspect_ratio" is not supported by model minimax-h3-max` | This model has no `aspect_ratio` field (also `reference_images`, `reference_videos`, `reference_audios`, `generate_audio`). | Remove the field. For reference inputs use `minimax-h3-fast` or `minimax-h3-normal`. |
| 400 `"images" accepts at most 2 items`                              | More than a first and a last frame.                                                                                         | Send one or two images.                                                              |
| 400 `"seed" is outside its supported range`                         | A negative or fractional seed.                                                                                              | Send a whole number of at least 0, or leave `seed` out.                              |
| Task `failed` with `content_policy_violation`                       | The prompt, an input or the result was refused by moderation.                                                               | Change the prompt or the inputs. Retrying unchanged fails again; nothing is charged. |
| 402 `insufficient_credits`                                          | The balance is below the price reserved for the request.                                                                    | Top up, or lower `duration` or `resolution`.                                         |## HTTP errors at a glanceErrors before a task exists arrive as a non-2xx response, and nothing is charged. Branch on `error.code` or `error.retryable`; `message` names the problem. The full list and retry policy are on [Errors](/errors).```json
{
  "error": {
    "code": "bad_request",
    "message": "\"prompt\" is required",
    "retryable": false,
    "request_id": "req_5f0c2a9e4b7d4e31"
  }
}
```| HTTP status | `error.code`                                                                                  | What to do                                                                                                            |
| ----------- | --------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------- |
| 400         | `bad_request`, `content_policy_violation`                                                     | Fix the request; the message names the field. Do not retry unchanged.                                                 |
| 401         | `missing_api_key`, `invalid_api_key` (older clients may see `unauthorized`)                   | Send a valid key as `Authorization: Bearer <key>`.                                                                    |
| 402         | `insufficient_credits`                                                                        | Top up, or raise the key’s quota, then send it again.                                                                 |
| 403         | `forbidden`                                                                                   | The key or account may not use this model (for example, free credit only covers some models). Do not retry unchanged. |
| 404         | `not_found`                                                                                   | On `GET /v1/tasks/{task_id}`: the task does not exist for this key’s account. Check the ID.                           |
| 409         | `idempotency_conflict`                                                                        | Use a new `Idempotency-Key`, or wait for the first request with this key to finish.                                   |
| 429         | `rate_limit_exceeded`                                                                         | Wait `Retry-After` seconds (also `error.retry_after_seconds`), then retry.                                            |
| 500         | `internal_error`                                                                              | Retry with backoff; contact support with `request_id` if it continues.                                                |
| 503         | `processing_unavailable`, `processing_timeout`, `processing_failed`, `result_transfer_failed` | Nothing was charged. Retry with exponential backoff.                                                                  |

Reference: https://docs.beatapi.io/api-reference/video-api/minimax-h3-max

## Authentication

- `Authorization` header (bearer token, required) — Send your API key as `Authorization: Bearer <BEATAPI_API_KEY>`.

## Servers

- `https://api.beatapi.io` (Direct, default)
- `https://api.beatapi.io` (API)

## Request

### Headers

- `Idempotency-Key` (string, optional) — Send the body as JSON with `Content-Type: application/json`. `Idempotency-Key` is optional: send a unique value (at most 255 characters) per logical request and reuse it only to retry that exact body. Within 24 hours a retry with the same key and body returns the first response again with `Idempotent-Replayed: true`; the same key with a different body returns `409 idempotency_conflict`. Responses other than 2xx are not stored, so a retry after a 400 or 402 runs again.

### Body (application/json)

This endpoint expects a MinimaxH3MaxVideoRequest.

- `model` (enum, required) — The model to run. **Value**: `minimax-h3-max` **If the value is wrong** - Missing: `"model" is required` - An image model sent to this endpoint: `"model" nano-banana-2 is served by POST /v1/images/tasks, not this endpoint`
  - Allowed values: `minimax-h3-max`
- `prompt` (string, required) — What happens in the shot: the motion, the expression, the camera and the style. **Length**: 1–5000 characters - Length is counted in characters (a CJK character counts as one). - With frames, describe how the video gets from one to the other, or what moves after the first frame. **If the value is wrong** - Missing: `"prompt" is required` - Empty or longer than the limit: `"prompt" has an unsupported length`
- `duration` (integer, optional, default: 5) — Length of the video in seconds, a whole number of at least 5. **Default**: `5` **Range**: ≥ 5 - If you leave it out, `5` is used. - The price follows this value (see Billing). **If the value is wrong** - Below 5 seconds, or not a whole number: `"duration" is outside its supported range`
- `images` (list of string, optional) — A first frame, or a first and a last frame. **Items**: 1–2 Each item is a public `https://` URL. For a local file, [upload it first](/quick-guide#upload-an-input-file) with `POST /v1/files` and pass the returned `data.url`. - One link: the video starts from this image. Two links: `images[0]` is the first frame and `images[1]` the last. - Reference images are not accepted on this model (`reference_images` is refused). **If the value is wrong** - More than two links: `"images" accepts at most 2 items` - Not an https:// link: `"images[0]" must be a public HTTPS URL`
- `resolution` (enum, optional, default: 768P) — Output resolution. 768P costs more per second than 480P. **Allowed values**: `480P`, `768P` **Default**: `768P` - Upper case only: `768p` is refused. - 1080P and 2K are not offered here; `minimax-h3-normal` has 1080p and `minimax-h3-fast` has 2K. **If the value is wrong** - A value not in the list (for example `768p`, `1080P` or `2K`): `"resolution" must be one of: [480P 768P]`
  - Allowed values: `480P`, `768P`
- `seed` (integer, optional) — A fixed number to seed the generation. Leave it out for a random seed. **Range**: ≥ 0 - A whole number of at least 0. **If the value is wrong** - Negative or not a whole number: `"seed" is outside its supported range`

## Response

### 201

The task object. `output` is `null` until the task succeeds. Fields marked “while running” disappear once the task finishes.

- `map from string to any`

## Errors

### 400 Bad Request Error

`bad_request`, `content_policy_violation` Fix the request; the message names the field. Do not retry unchanged.

- `map from string to any`

### 401 Unauthorized Error

`missing_api_key`, `invalid_api_key` (older clients may see `unauthorized`) Send a valid key as `Authorization: Bearer <key>`.

- `map from string to any`

### 402 Payment Required Error

`insufficient_credits` Top up, or raise the key’s quota, then send it again.

- `map from string to any`

### 403 Forbidden Error

`forbidden` The key or account may not use this model (for example, free credit only covers some models). Do not retry unchanged.

- `map from string to any`

### 409 Conflict Error

`idempotency_conflict` Use a new `Idempotency-Key`, or wait for the first request with this key to finish.

- `map from string to any`

### 429 Too Many Requests Error

`rate_limit_exceeded` Wait `Retry-After` seconds (also `error.retry_after_seconds`), then retry.

- `map from string to any`

### 500 Internal Server Error

`internal_error` Retry with backoff; contact support with `request_id` if it continues.

- `map from string to any`

### 503 Service Unavailable Error

`processing_unavailable`, `processing_timeout`, `processing_failed`, `result_transfer_failed` Nothing was charged. Retry with exponential backoff.

- `map from string to any`

## Examples

### Text to video

**Request**

```json
{
  "model": "minimax-h3-max",
  "prompt": "A slow cinematic push through a misty mountain village at dawn, smoke rising from the chimneys",
  "duration": 5,
  "resolution": "768P"
}
```

**Response**

```json
{
  "data": {
    "capability_id": "minimax-h3-max",
    "capability_version": 1,
    "completed_at": null,
    "created_at": 1791993600,
    "error_code": null,
    "error_message": null,
    "id": "task_7Qm2Xc9LpR4vT8sKa1Nf6YbH3eWdJ0uZ",
    "media_type": "video",
    "model": "minimax-h3-max",
    "object": "task",
    "output": null,
    "poll_after_seconds": 8,
    "request_id": "req_5f0c2a9e4b7d4e31",
    "stage": "queued",
    "status": "queued",
    "task_kind": "video",
    "updated_at": 1791993600,
    "usage": {
      "billable_duration_seconds": 5,
      "credits_charged": 0.4,
      "credits_refunded": 0,
      "credits_reserved": 0.4,
      "credits_settled": 0
    }
  }
}
```

**SDK Code**

```python Text to video
import requests

url = "https://api.beatapi.io/v1/videos/tasks"

payload = {
    "model": "minimax-h3-max",
    "prompt": "A slow cinematic push through a misty mountain village at dawn, smoke rising from the chimneys",
    "duration": 5,
    "resolution": "768P"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.json())
```

```javascript Text to video
const url = 'https://api.beatapi.io/v1/videos/tasks';
const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: '{"model":"minimax-h3-max","prompt":"A slow cinematic push through a misty mountain village at dawn, smoke rising from the chimneys","duration":5,"resolution":"768P"}'
};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go Text to video
package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.beatapi.io/v1/videos/tasks"

	payload := strings.NewReader("{\n  \"model\": \"minimax-h3-max\",\n  \"prompt\": \"A slow cinematic push through a misty mountain village at dawn, smoke rising from the chimneys\",\n  \"duration\": 5,\n  \"resolution\": \"768P\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby Text to video
require 'uri'
require 'net/http'

url = URI("https://api.beatapi.io/v1/videos/tasks")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"model\": \"minimax-h3-max\",\n  \"prompt\": \"A slow cinematic push through a misty mountain village at dawn, smoke rising from the chimneys\",\n  \"duration\": 5,\n  \"resolution\": \"768P\"\n}"

response = http.request(request)
puts response.read_body
```

```java Text to video
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://api.beatapi.io/v1/videos/tasks")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"model\": \"minimax-h3-max\",\n  \"prompt\": \"A slow cinematic push through a misty mountain village at dawn, smoke rising from the chimneys\",\n  \"duration\": 5,\n  \"resolution\": \"768P\"\n}")
  .asString();
```

```php Text to video
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.beatapi.io/v1/videos/tasks', [
  'body' => '{
  "model": "minimax-h3-max",
  "prompt": "A slow cinematic push through a misty mountain village at dawn, smoke rising from the chimneys",
  "duration": 5,
  "resolution": "768P"
}',
  'headers' => [
    'Authorization' => 'Bearer <token>',
    'Content-Type' => 'application/json',
  ],
]);

echo $response->getBody();
```

```csharp Text to video
using RestSharp;

var client = new RestClient("https://api.beatapi.io/v1/videos/tasks");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Bearer <token>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"model\": \"minimax-h3-max\",\n  \"prompt\": \"A slow cinematic push through a misty mountain village at dawn, smoke rising from the chimneys\",\n  \"duration\": 5,\n  \"resolution\": \"768P\"\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift Text to video
import Foundation

let headers = [
  "Authorization": "Bearer <token>",
  "Content-Type": "application/json"
]
let parameters = [
  "model": "minimax-h3-max",
  "prompt": "A slow cinematic push through a misty mountain village at dawn, smoke rising from the chimneys",
  "duration": 5,
  "resolution": "768P"
] as [String : Any]

let postData = JSONSerialization.data(withJSONObject: parameters, options: [])

let request = NSMutableURLRequest(url: NSURL(string: "https://api.beatapi.io/v1/videos/tasks")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```

### First frame

**Request**

```json
{
  "model": "minimax-h3-max",
  "prompt": "The performer turns toward the camera as neon light sweeps across the stage",
  "duration": 5,
  "images": [
    "https://media.beatapi.io/samples/neon-singer.png"
  ],
  "resolution": "768P"
}
```

**Response**

```json
{
  "data": {
    "capability_id": "minimax-h3-max",
    "capability_version": 1,
    "completed_at": null,
    "created_at": 1791993600,
    "error_code": null,
    "error_message": null,
    "id": "task_7Qm2Xc9LpR4vT8sKa1Nf6YbH3eWdJ0uZ",
    "media_type": "video",
    "model": "minimax-h3-max",
    "object": "task",
    "output": null,
    "poll_after_seconds": 8,
    "request_id": "req_5f0c2a9e4b7d4e31",
    "stage": "queued",
    "status": "queued",
    "task_kind": "video",
    "updated_at": 1791993600
  }
}
```

**SDK Code**

```python First frame
import requests

url = "https://api.beatapi.io/v1/videos/tasks"

payload = {
    "model": "minimax-h3-max",
    "prompt": "The performer turns toward the camera as neon light sweeps across the stage",
    "duration": 5,
    "images": ["https://media.beatapi.io/samples/neon-singer.png"],
    "resolution": "768P"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.json())
```

```javascript First frame
const url = 'https://api.beatapi.io/v1/videos/tasks';
const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: '{"model":"minimax-h3-max","prompt":"The performer turns toward the camera as neon light sweeps across the stage","duration":5,"images":["https://media.beatapi.io/samples/neon-singer.png"],"resolution":"768P"}'
};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go First frame
package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.beatapi.io/v1/videos/tasks"

	payload := strings.NewReader("{\n  \"model\": \"minimax-h3-max\",\n  \"prompt\": \"The performer turns toward the camera as neon light sweeps across the stage\",\n  \"duration\": 5,\n  \"images\": [\n    \"https://media.beatapi.io/samples/neon-singer.png\"\n  ],\n  \"resolution\": \"768P\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby First frame
require 'uri'
require 'net/http'

url = URI("https://api.beatapi.io/v1/videos/tasks")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"model\": \"minimax-h3-max\",\n  \"prompt\": \"The performer turns toward the camera as neon light sweeps across the stage\",\n  \"duration\": 5,\n  \"images\": [\n    \"https://media.beatapi.io/samples/neon-singer.png\"\n  ],\n  \"resolution\": \"768P\"\n}"

response = http.request(request)
puts response.read_body
```

```java First frame
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://api.beatapi.io/v1/videos/tasks")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"model\": \"minimax-h3-max\",\n  \"prompt\": \"The performer turns toward the camera as neon light sweeps across the stage\",\n  \"duration\": 5,\n  \"images\": [\n    \"https://media.beatapi.io/samples/neon-singer.png\"\n  ],\n  \"resolution\": \"768P\"\n}")
  .asString();
```

```php First frame
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.beatapi.io/v1/videos/tasks', [
  'body' => '{
  "model": "minimax-h3-max",
  "prompt": "The performer turns toward the camera as neon light sweeps across the stage",
  "duration": 5,
  "images": [
    "https://media.beatapi.io/samples/neon-singer.png"
  ],
  "resolution": "768P"
}',
  'headers' => [
    'Authorization' => 'Bearer <token>',
    'Content-Type' => 'application/json',
  ],
]);

echo $response->getBody();
```

```csharp First frame
using RestSharp;

var client = new RestClient("https://api.beatapi.io/v1/videos/tasks");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Bearer <token>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"model\": \"minimax-h3-max\",\n  \"prompt\": \"The performer turns toward the camera as neon light sweeps across the stage\",\n  \"duration\": 5,\n  \"images\": [\n    \"https://media.beatapi.io/samples/neon-singer.png\"\n  ],\n  \"resolution\": \"768P\"\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift First frame
import Foundation

let headers = [
  "Authorization": "Bearer <token>",
  "Content-Type": "application/json"
]
let parameters = [
  "model": "minimax-h3-max",
  "prompt": "The performer turns toward the camera as neon light sweeps across the stage",
  "duration": 5,
  "images": ["https://media.beatapi.io/samples/neon-singer.png"],
  "resolution": "768P"
] as [String : Any]

let postData = JSONSerialization.data(withJSONObject: parameters, options: [])

let request = NSMutableURLRequest(url: NSURL(string: "https://api.beatapi.io/v1/videos/tasks")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```

### First and last frame

**Request**

```json
{
  "model": "minimax-h3-max",
  "prompt": "The camera moves smoothly from the bottle on the table to the singer on a neon stage in one continuous shot",
  "duration": 6,
  "images": [
    "https://media.beatapi.io/samples/smart-bottle.png",
    "https://media.beatapi.io/samples/neon-singer.png"
  ],
  "resolution": "480P",
  "seed": 42
}
```

**Response**

```json
{
  "data": {
    "capability_id": "minimax-h3-max",
    "capability_version": 1,
    "completed_at": null,
    "created_at": 1791993600,
    "error_code": null,
    "error_message": null,
    "id": "task_7Qm2Xc9LpR4vT8sKa1Nf6YbH3eWdJ0uZ",
    "media_type": "video",
    "model": "minimax-h3-max",
    "object": "task",
    "output": null,
    "poll_after_seconds": 8,
    "request_id": "req_5f0c2a9e4b7d4e31",
    "stage": "queued",
    "status": "queued",
    "task_kind": "video",
    "updated_at": 1791993600
  }
}
```

**SDK Code**

```python First and last frame
import requests

url = "https://api.beatapi.io/v1/videos/tasks"

payload = {
    "model": "minimax-h3-max",
    "prompt": "The camera moves smoothly from the bottle on the table to the singer on a neon stage in one continuous shot",
    "duration": 6,
    "images": ["https://media.beatapi.io/samples/smart-bottle.png", "https://media.beatapi.io/samples/neon-singer.png"],
    "resolution": "480P",
    "seed": 42
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.json())
```

```javascript First and last frame
const url = 'https://api.beatapi.io/v1/videos/tasks';
const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: '{"model":"minimax-h3-max","prompt":"The camera moves smoothly from the bottle on the table to the singer on a neon stage in one continuous shot","duration":6,"images":["https://media.beatapi.io/samples/smart-bottle.png","https://media.beatapi.io/samples/neon-singer.png"],"resolution":"480P","seed":42}'
};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go First and last frame
package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.beatapi.io/v1/videos/tasks"

	payload := strings.NewReader("{\n  \"model\": \"minimax-h3-max\",\n  \"prompt\": \"The camera moves smoothly from the bottle on the table to the singer on a neon stage in one continuous shot\",\n  \"duration\": 6,\n  \"images\": [\n    \"https://media.beatapi.io/samples/smart-bottle.png\",\n    \"https://media.beatapi.io/samples/neon-singer.png\"\n  ],\n  \"resolution\": \"480P\",\n  \"seed\": 42\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby First and last frame
require 'uri'
require 'net/http'

url = URI("https://api.beatapi.io/v1/videos/tasks")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"model\": \"minimax-h3-max\",\n  \"prompt\": \"The camera moves smoothly from the bottle on the table to the singer on a neon stage in one continuous shot\",\n  \"duration\": 6,\n  \"images\": [\n    \"https://media.beatapi.io/samples/smart-bottle.png\",\n    \"https://media.beatapi.io/samples/neon-singer.png\"\n  ],\n  \"resolution\": \"480P\",\n  \"seed\": 42\n}"

response = http.request(request)
puts response.read_body
```

```java First and last frame
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://api.beatapi.io/v1/videos/tasks")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"model\": \"minimax-h3-max\",\n  \"prompt\": \"The camera moves smoothly from the bottle on the table to the singer on a neon stage in one continuous shot\",\n  \"duration\": 6,\n  \"images\": [\n    \"https://media.beatapi.io/samples/smart-bottle.png\",\n    \"https://media.beatapi.io/samples/neon-singer.png\"\n  ],\n  \"resolution\": \"480P\",\n  \"seed\": 42\n}")
  .asString();
```

```php First and last frame
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.beatapi.io/v1/videos/tasks', [
  'body' => '{
  "model": "minimax-h3-max",
  "prompt": "The camera moves smoothly from the bottle on the table to the singer on a neon stage in one continuous shot",
  "duration": 6,
  "images": [
    "https://media.beatapi.io/samples/smart-bottle.png",
    "https://media.beatapi.io/samples/neon-singer.png"
  ],
  "resolution": "480P",
  "seed": 42
}',
  'headers' => [
    'Authorization' => 'Bearer <token>',
    'Content-Type' => 'application/json',
  ],
]);

echo $response->getBody();
```

```csharp First and last frame
using RestSharp;

var client = new RestClient("https://api.beatapi.io/v1/videos/tasks");
var request = new RestRequest(Method.POST);
request.AddHeader("Authorization", "Bearer <token>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"model\": \"minimax-h3-max\",\n  \"prompt\": \"The camera moves smoothly from the bottle on the table to the singer on a neon stage in one continuous shot\",\n  \"duration\": 6,\n  \"images\": [\n    \"https://media.beatapi.io/samples/smart-bottle.png\",\n    \"https://media.beatapi.io/samples/neon-singer.png\"\n  ],\n  \"resolution\": \"480P\",\n  \"seed\": 42\n}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift First and last frame
import Foundation

let headers = [
  "Authorization": "Bearer <token>",
  "Content-Type": "application/json"
]
let parameters = [
  "model": "minimax-h3-max",
  "prompt": "The camera moves smoothly from the bottle on the table to the singer on a neon stage in one continuous shot",
  "duration": 6,
  "images": ["https://media.beatapi.io/samples/smart-bottle.png", "https://media.beatapi.io/samples/neon-singer.png"],
  "resolution": "480P",
  "seed": 42
] as [String : Any]

let postData = JSONSerialization.data(withJSONObject: parameters, options: [])

let request = NSMutableURLRequest(url: NSURL(string: "https://api.beatapi.io/v1/videos/tasks")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```