curl --request POST \
--url https://api.poyo.ai/api/generate/submit \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"model": "flux-kontext-pro",
"callback_url": "https://your-domain.com/callback",
"input": {
"prompt": "A luxury perfume bottle on a reflective marble surface, premium studio lighting",
"size": "16:9",
"output_format": "png"
}
}
'{
"code": 200,
"data": {
"task_id": "task-unified-1757165031-uyujaw3d",
"status": "not_started",
"created_time": "2025-11-12T10:30:00"
}
}{
"code": 400,
"error": {
"message": "Invalid request parameters",
"type": "invalid_request_error"
}
}{
"code": 401,
"error": {
"message": "Unauthorized - Invalid API key",
"type": "authentication_error"
}
}Flux Kontext
The FLUX.1 Kontext API generates images from text or edits one reference image with Pro or Max. Aspect ratios run from 21:9 to 9:21, and edit requests use only the first image URL.
curl --request POST \
--url https://api.poyo.ai/api/generate/submit \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"model": "flux-kontext-pro",
"callback_url": "https://your-domain.com/callback",
"input": {
"prompt": "A luxury perfume bottle on a reflective marble surface, premium studio lighting",
"size": "16:9",
"output_format": "png"
}
}
'{
"code": 200,
"data": {
"task_id": "task-unified-1757165031-uyujaw3d",
"status": "not_started",
"created_time": "2025-11-12T10:30:00"
}
}{
"code": 400,
"error": {
"message": "Invalid request parameters",
"type": "invalid_request_error"
}
}{
"code": 401,
"error": {
"message": "Unauthorized - Invalid API key",
"type": "authentication_error"
}
}- After submission, a
task_idwill be returned. If you provided acallback_url, when the task status becomesfinishedorfailed, a POST request will be sent to thecallback_url. - Regardless of whether
callback_urlis provided, you can retrieve the result through the unified Query Task Status endpoint.
Models
- flux-kontext-pro - Flux Kontext Pro text-to-image generation
- flux-kontext-pro-edit - Flux Kontext Pro image editing,
image_urlsis required - flux-kontext-max - Flux Kontext Max text-to-image generation
- flux-kontext-max-edit - Flux Kontext Max image editing,
image_urlsis required
Notes
sizesupports1:1,4:3,3:4,16:9,9:16,21:9,9:21output_formatsupportspng,jpgimage_urlsis required for edit models- Only
image_urls[0]is used as the input image - Other downstream fields are not exposed in the current API and use system defaults
Authorizations
All API endpoints require Bearer Token authentication.
Create an API key: sign in to PoYo, open Dashboard → API Key at poyo.ai/dashboard/api-key, and click to create a key.
Add it to the request header:
Authorization: Bearer YOUR_API_KEY
Body
Flux Kontext model identifier
flux-kontext-pro, flux-kontext-pro-edit, flux-kontext-max, flux-kontext-max-edit Input parameters for generation
Show child attributes
Show child attributes
Webhook callback URL for result notifications
"https://your-domain.com/callback"
Response
Task submitted successfully
Business status code. 200 means success; any other value means the request failed. Always check this field: some validation errors return HTTP 200 with code: 400 in the body.
200: Success400: Invalid request parameters401: Missing or invalid API key402: Insufficient credits403: Permission denied404: Resource not found408: Request timeout429: Rate limit exceeded500: Internal server error502: Upstream service error503: Service unavailable
See Error Codes for details.
200, 400, 401, 402, 403, 404, 408, 429, 500, 502, 503 200
Show child attributes
Show child attributes