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BeatAPINano Banana 2 1Image API

Nano Banana 2.1

Generate or edit images with the successor to Nano Banana 2, from text and up to 14 public HTTPS reference images, with 1K, 2K, or 4K output.

Supported modes

ModeRequired inputRules
Text to imagemodel, promptOmit images.
Reference imagemodel, prompt, imagesProvide 1–14 public HTTPS PNG, JPEG or WebP image URLs.

Async flow: Create the task, save data.id, then poll the Task with GET /v1/tasks/{task_id}. On succeeded, read data.output.media. On failed, read data.error_code and data.error_message, then follow the error and retry policy.

Using a local file? upload a local input first and pass the returned data.url.

Authentication

AuthorizationBearer

Send your API key as Authorization: Bearer <BEATAPI_API_KEY>.

Headers

Idempotency-KeystringOptional<=255 characters

Request

This endpoint expects an object.
model"nano-banana-2.1"Required

Must be nano-banana-2.1.

promptstringRequired1-5000 characters

Generation or image-editing instructions.

imageslist of stringsOptional

Public HTTPS reference-image URLs in PNG, JPEG or WebP; each link is checked when the task is created, and one that is not such an image (an error page, a GIF, a 404) is refused with 400. Omit for text-to-image.

aspect_ratioenumOptionalDefaults to 1:1
Output image aspect ratio.
resolutionenumOptionalDefaults to 1K
Output resolution tier.
Allowed values:
output_formatenumOptionalDefaults to png
Output image file format.
Allowed values:

Response

Image generation task accepted

Errors

400
Bad Request Error
401
Unauthorized Error
402
Payment Required Error
403
Forbidden Error
409
Conflict Error
429
Too Many Requests Error
500
Internal Server Error
503
Service Unavailable Error