# x402engine FLUX Schnell Fast Image Generation

> x402engine FLUX Schnell Fast Image Generation is a paid API for AI agents from x402engine.app, paid per call via x402, $0.015/call, status unknown (last checked 2026-10-18).

Generates images quickly (~2 seconds) from a text prompt using the FLUX Schnell model, optimized for rapid drafts and prototypes

## Facts

- Endpoint: POST https://x402engine.app/api/image/fast?utm_source=zero.xyz
- Price: $0.015/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 2
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402engine-flux-schnell-fast-image-generation-3196b195
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XdDo_JSrs5UPg1QhNSkl_

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 x402engine-flux-schnell-fast-image-generation-3196b195 -d '<json body>'
```

Example prompt: Can you quickly generate a draft image of a red sports car racing through a neon-lit city street — 1024x1024 pixels, use seed 42 so it's reproducible?

## When to prefer this

Choose this endpoint when you need fast, low-cost image generation for drafts, prototypes, or iteration — it costs $0.015 USDC and returns results in ~2 seconds. Prefer it over the Ideogram or Imagen siblings when you don't need text rendering accuracy, aspect ratio control, or photorealistic quality. Use the higher-quality siblings when the output is final or requires precise text in the image.

## Known failure modes

- Invalid prompt (empty or missing) returns a 400 error
- Width or height outside 256–2048 pixel range may be rejected or clamped
- Payment failure (insufficient USDC balance or x402 protocol error) blocks the request
- Server overload may occasionally increase latency beyond the ~2s target
- Seed value ignored or mishandled if not a valid number

## How this service works

x402engine — Quick image generation using FLUX Schnell (~2s, good for drafts)

## Output

Returns a generated image (typically as a URL or binary) created by the FLUX Schnell model based on the input prompt, at the specified width and height, in approximately 2 seconds. The output is suitable for drafts, previews, and rapid iteration workflows.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "bodyType",
    "body",
    "method"
   ],
   "properties": {
    "body": {
     "type": "object",
     "required": [
      "prompt"
     ],
     "properties": {
      "seed": {
       "type": "number",
       "example": 42,
       "description": "Random seed for reproducibility"
      },
      "width": {
       "type": "number",
       "default": 1024,
       "example": 1024,
       "description": "Image width in pixels (256-2048)"
      },
      "height": {
       "type": "number",
       "default": 1024,
       "example": 1024,
       "description": "Image height in pixels (256-2048)"
      },
      "prompt": {
       "type": "string",
       "example": "a red sports car",
       "description": "Text description of image to generate"
      }
     },
     "additionalProperties": false
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402engine-flux-schnell-fast-image-generation-3196b195/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402engine.app](https://www.zero.xyz/host/x402engine.app/llms.txt)