# AgentUtility Blog Header Image Generator

> AgentUtility Blog Header Image Generator is a paid API for AI agents from x402.agentutility.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Generates a blog header image using the Chroma model via Venice, returning a 1024×768 PNG URL for $0.01 USDC per call.

## Facts

- Endpoint: POST https://x402.agentutility.ai/blog-header-image-generate
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentutility-blog-header-image-generator-28ebe4ab
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hnHI--U5wyQKk8A69tXuw

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 agentutility-blog-header-image-generator-28ebe4ab -d '<json body>'
```

Example prompt: Generate a blog header image for my article titled 'The Future of Autonomous AI Agents' — something futuristic and clean, wide format at 1024×768.

## When to prefer this

Choose this endpoint when you need a ready-to-use wide-format (1024×768) blog header image generated via the Chroma model through Venice AI, settled in USDC over x402. Prefer it for agent-automated content pipelines that need pay-per-use image generation without subscriptions or API key management — especially when the agent already has an x402-capable wallet on Base.

## Known failure modes

- Payment not included or insufficient USDC — returns HTTP 402 requiring x402 payment
- Invalid or missing prompt input — may return a 400 or generate a blank/nonsensical image
- Venice/fal.media backend unavailable — upstream timeout or 503
- Generated image URL expires or becomes inaccessible after a short TTL

## How this service works

Paid x402 endpoints organized into product clusters. USDC-settled on Base. MCP-callable. ERC-8004 identity registry agentId 47167.

## Output

Returns a JSON object with the model used ('chroma'), image dimensions (1024×768), the source platform ('venice'), and a direct URL to the generated PNG image hosted on fal.media.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "required": [
      "prompt"
     ],
     "properties": {
      "seed": {
       "type": "number",
       "description": "Optional integer seed for reproducible output."
      },
      "tier": {
       "enum": [
        "fast",
        "creative",
        "anime",
        "sd35"
       ],
       "type": "string",
       "description": "Model shorthand: 'fast' (z-image-turbo), 'creative' (chroma), 'anime' (wai-Illustrious), or 'sd35' (venice-sd35). Default fast."
      },
      "model": {
       "type": "string",
       "description": "Explicit Venice model override, restricted to this endpoint's cheap allow-list. Use tier instead unless you need a specific model."
      },
      "steps": {
       "type": "number",
       "description": "Optional diffusion step count passed to Venice."
      },
      "width": {
       "type": "number",
       "description": "Output width in px, 256-1024. Snapped to a multiple of 16. Default 1024."
      },
      "height": {
       "type": "number",
       "description": "Output height in px, 256-1024. Snapped to a multiple of 16. Default 1024."
      },
      "prompt": {
       "type": "string",
       "description": "Image description. Up to 2000 chars."
      },
      "cfg_scale": {
       "type": "number",
       "description": "Optional classifier-free guidance scale passed to Venice."
      },
      "negative_prompt": {
       "type": "string",
       "description": "Optional text describing what to avoid in the image."
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "model": {
       "type": "string"
      },
      "width": {
       "type": "integer"
      },
      "height": {
       "type": "integer"
      },
      "source": {
       "type": "string"
      },
      "image_url": {
… (truncated)
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "model": "chroma",
  "width": 1024,
  "height": 768,
  "source": "venice",
  "image_url": "https://v3.fal.media/files/abc/xyz/image.png"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentutility-blog-header-image-generator-28ebe4ab/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.agentutility.ai](https://www.zero.xyz/host/x402.agentutility.ai/llms.txt)