# PayWeave Fal · FLUX Pro v1.1 Ultra Image Generation

> PayWeave Fal · FLUX Pro v1.1 Ultra Image Generation is a paid API for AI agents from fal.payweave.services, paid per call via x402, $0.12/call, status unknown (last checked 2026-09-15).

Generates ultra-high-quality images from text prompts using FLUX Pro v1.1 Ultra via fal.ai, billed per-call at $0.12 USDC

## Facts

- Endpoint: POST https://fal.payweave.services/models/fal-ai/flux-pro/v1.1-ultra/run
- Price: $0.12/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/payweave-fal-flux-pro-v1-1-ultra-image-generation-1dcd7140
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tLpRdorhda_n-rJjDpV3B

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability payweave-fal-flux-pro-v1-1-ultra-image-generation-1dcd7140 -d '<json body>'
```

Example prompt: Generate a photorealistic image of a misty mountain lake at golden hour with pine trees reflected in the water — use FLUX Pro Ultra for the highest quality output.

## When to prefer this

Choose this endpoint when you need top-tier image quality from FLUX Pro v1.1 Ultra specifically, want pay-per-call billing with no subscription, need sub-second to fast inference with a CDN-hosted result URL, and are operating in a crypto-native or x402-payment environment. Prefer over other fal endpoints when FLUX Pro Ultra quality is explicitly required over standard or cheaper models.

## Known failure modes

- Insufficient USDC balance causes 402 payment required error before inference begins
- Invalid or missing input object returns 400 bad request
- Model overload or timeout may return an error string in the error field with a null output
- Generated image URL expires after ~24 hours making cached links stale
- Malformed prompt or unsupported parameters may cause inference failure with error details in response

## How this service works

Sub-second generative AI inference — image, video, audio.

## Output

Returns a JSON object containing a fal request ID, model name, status ('succeeded'), a CDN-hosted image URL (fal-hosted, valid for ~24 hours), inference time in seconds, and the USD amount charged for the call. The image URL points directly to the generated image.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "prompt"
   ],
   "properties": {
    "raw": {
     "type": "boolean",
     "description": "Skip prompt enhancement for a more literal interpretation."
    },
    "seed": {
     "type": "integer",
     "minimum": 0,
     "description": "Random seed; omit for non-deterministic outputs."
    },
    "prompt": {
     "type": "string",
     "maxLength": 5000,
     "minLength": 1,
     "description": "Text prompt describing the desired image."
    },
    "aspect_ratio": {
     "enum": [
      "1:1",
      "16:9",
      "9:16",
      "4:3",
      "3:4",
      "21:9",
      "9:21",
      "3:2",
      "2:3"
     ],
     "type": "string"
    },
    "output_format": {
     "enum": [
      "jpeg",
      "png"
     ],
     "type": "string"
    },
    "safety_tolerance": {
     "enum": [
      "1",
      "2",
      "3",
      "4",
      "5",
      "6"
     ],
     "type": "string",
     "description": "Content safety strictness; 1=strictest, 6=most permissive. Default 2."
    },
    "enable_safety_checker": {
     "type": "boolean"
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/payweave-fal-flux-pro-v1-1-ultra-image-generation-1dcd7140/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from fal.payweave.services](https://www.zero.xyz/host/fal.payweave.services/llms.txt)