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FLUX Pro 1.1 Ultra Text-to-Image (PaySponge x402)
x402
FLUX Pro 1.1 Ultra Text-to-Image (PaySponge x402) is a paid API for AI agents from fal.x402.paysponge.com, paid per call via x402, $0.06/call, status unknown (last checked 2026-10-12).
Submits a FLUX Pro 1.1 Ultra text-to-image generation job via fal.ai through the PaySponge x402 payment wrapper, with support for image prompting, aspect ratio control, and raw rendering mode.
Price / call$0.06
Success—
StatusUnknown
How this service works
POST /fal-ai/flux-pro/v1.1-ultra
Output
Returns a JSON object containing a request_id, a response_url to poll for the final image, a status_url to check job progress, a cancel_url to abort the job, and the current queue_position. The agent must poll the response_url or status_url asynchronously to retrieve the generated image once processing completes.
Example use cases
Example prompt
“Generate a photorealistic 16:9 landscape image of a misty Japanese mountain village at dawn with wooden bridges and lanterns, using raw rendering mode for a natural look — make the prompt enhancement off and use seed 42.”
Technical details
Endpoint
POSThttps://fal.x402.paysponge.com/fal-ai/flux-pro/v1.1-ultra?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need the highest-quality FLUX Pro image generation (Ultra tier) with optional image-to-image prompting, non-standard aspect ratios (e.g. 21:9 cinematic or 9:21 tall), or raw/natural rendering mode. Prefer over FLUX Pro v1.1 (non-Ultra) when maximum detail and flexibility are needed. Prefer over FLUX Schnell or FLUX Dev when quality outweighs speed. Use when the requester is willing to pay $0.06 USDC per image for top-tier output. Not ideal for rapid iteration or batch previews where cheaper/faster variants suffice.
Side effects
- Payment not accepted or insufficient USDC balance — x402 payment handshake fails before job is submitted
- Invalid aspect_ratio enum value — returns validation error
- Prompt missing from request body — returns 400 bad request
- image_url is unreachable or malformed — fal.ai backend rejects reference image
- image_prompt_strength outside 0–1 range — validation error
- Safety tolerance mismatch causes content rejection
- Job queued but result never returned — must poll status_url and handle timeout
- Rate limiting or capacity errors from fal.ai backend
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| raw | boolean | Generate less processed, more natural-looking images. |
| seed | integer | |
| promptrequired | string | Text prompt describing the desired output. Be concrete: name the subject, style, composition, and any key attributes. Longer prompts (50–200 words) typically produce more faithful results. |
| image_url | string | Optional reference image URL. |
| sync_mode | boolean | |
| num_images | integer | |
| aspect_ratio | string | |
| output_format | string | |
| enhance_prompt | boolean | |
| safety_tolerance | string | |
| image_prompt_strength | number | Strength of the image prompt between 0 and 1. |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| cancel_urlrequired | string | |
| request_idrequired | string | |
| status_urlrequired | string | |
| response_urlrequired | string | |
| queue_positionrequired | integer |
Tags
x402
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