# agentutility — paid x402 endpoints for autonomous agents

> agentutility — paid x402 endpoints for autonomous agents is a paid API for AI agents from x402.agentutility.ai, paid per call via x402, $0.22/call, status unknown (last checked 2026-09-14).

## Facts

- Endpoint: POST https://x402.agentutility.ai/image-generate-ultra
- Price: $0.22/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/image-generate-ultra-9ad6ed36
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wml4jbVX1LaqsD83VQz0e

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 image-generate-ultra-9ad6ed36 -d '<json body>'
```

## How this service works

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

## Request schema (JSON Schema)

```json
{
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "type": "object",
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "type": "string",
     "enum": [
      "POST"
     ]
    },
    "bodyType": {
     "type": "string",
     "enum": [
      "json",
      "form-data",
      "text"
     ]
    },
    "body": {
     "properties": {
      "prompt": {
       "type": "string",
       "description": "Image description. Up to 5000 chars."
      },
      "width": {
       "type": "number",
       "description": "Output width in pixels. Range [256, 1024]. Default 1024."
      },
      "height": {
       "type": "number",
       "description": "Output height in pixels. Range [256, 1024]. Default 1024."
      },
      "tier": {
       "type": "string",
       "enum": [
        "nano-banana",
        "nano-banana-2",
        "nano-banana-lite",
        "grok-sota"
       ],
       "description": "Model shorthand. nano-banana=nano-banana-pro (default), nano-banana-2=nano-banana-2, nano-banana-lite=nano-banana-2-lite, grok-sota=grok-imagine-image-quality."
      },
      "model": {
       "type": "string",
       "description": "Override the model. Allowed: nano-banana-pro, nano-banana-2, nano-banana-2-lite, grok-imagine-image-quality."
      },
      "steps": {
       "type": "number",
       "description": "Diffusion steps. Optional; depends on model."
      },
      "cfg_scale": {
       "type": "number",
       "description": "Classifier-free guidance scale. Optional."
      },
      "seed": {
       "type": "number",
       "description": "Random seed. Optional."
      },
      "negative_prompt": {
       "type": "string",
       "description": "Negative prompt. Optional."
      }
     },
     "required": [
      "prompt"
     ]
    }
   },
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "image_url": {
       "type": "string"
      },
      "model": {
       "type": "string"
      },
      "width": {
       "type": "integer"
      },
      "height": {
       "type": "integer"
      },
      "tier": {
       "type": "string"
      },
      "prompt": {
       "type": "string"
      },
      "seed": {
       "type": "null"
     
… (truncated)
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "seed": null,
  "tier": "nano-banana",
  "model": "nano-banana-pro",
  "width": 1024,
  "height": 1024,
  "prompt": "A tiger drinking espresso at a Parisian café, ultra-detailed, cinematic lighting",
  "source": "venice",
  "image_url": "https://v3.fal.media/files/abc/xyz/image.png",
  "elapsed_ms": 25000,
  "venice_request_id": "ven_ultra_4f8a2b..."
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/image-generate-ultra-9ad6ed36/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)