curl --request POST \
--url https://api.poyo.ai/api/generate/submit \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"model": "flux-dev",
"callback_url": "https://your-domain.com/callback",
"input": {
"prompt": "A cinematic product photo of a matte black smart speaker on a marble table, soft studio lighting",
"size": "4:3",
"n": 1,
"output_format": "png"
}
}
'{
"code": 200,
"data": {
"task_id": "task-unified-1757165031-uyujaw3d",
"status": "not_started",
"created_time": "2026-06-26T10:30:00"
}
}Flux
Flux Dev Image Generation
Flux Dev text-to-image generation and single-image editing
POST
/
api
/
generate
/
submit
curl --request POST \
--url https://api.poyo.ai/api/generate/submit \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"model": "flux-dev",
"callback_url": "https://your-domain.com/callback",
"input": {
"prompt": "A cinematic product photo of a matte black smart speaker on a marble table, soft studio lighting",
"size": "4:3",
"n": 1,
"output_format": "png"
}
}
'{
"code": 200,
"data": {
"task_id": "task-unified-1757165031-uyujaw3d",
"status": "not_started",
"created_time": "2026-06-26T10:30:00"
}
}- 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 response result through the unified Query Task Status endpoint.
Flux Dev Image Generation
Generate images withflux-dev from a prompt, or provide one input.image_urls item to edit an existing image.
Use input.size for text-to-image output size, input.n for the output image count, and input.output_format for the returned image format. Supported size values are 1:1, 1:1 HD, 4:3, 3:4, 16:9, and 9:16; 1:1 HD is the high-definition square option. Custom WIDTHxHEIGHT values such as 1024x1536 are also supported. For image-to-image tasks, the source image guides the output and input.size is ignored.
Billing is based on output image size and output image count.
Available Models
- flux-dev - Text-to-image generation and single-image editing
Authorizations
All API endpoints require Bearer Token authentication
Get your API Key:
Visit the API Key Management Page to get your API Key
Add it to the request header:
Authorization: Bearer YOUR_API_KEY
Body
application/json
Flux Dev model identifier
Available options:
flux-dev Input parameters. Omit image_urls for text-to-image generation, or provide one image URL for image-to-image editing.
Show child attributes
Show child attributes
Webhook callback URL for result notifications
Example:
"https://your-domain.com/callback"