# x402-deployer Image Descriptor / Vision LLM

> x402-deployer Image Descriptor / Vision LLM is a paid API for AI agents from x402-deployer.x402-deployer.workers.dev, paid per call via x402, $0.020000/call, status unknown (last checked 2026-10-12).

Analyzes an image using a vision LLM to produce descriptions, accessibility alt-text, OCR text extraction, keyword tags, or single-sentence captions depending on the requested mode.

## Facts

- Endpoint: POST https://x402-deployer.x402-deployer.workers.dev/describe-image?utm_source=zero.xyz
- Price: $0.020000/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Success rate: 0% of calls made through Zero
- Activations on Zero: 1
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-deployer-x402-deployer-workers-dev-e254b046
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_YB1gF-9X5R5DDZYbg8L65

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 x402-deployer-x402-deployer-workers-dev-e254b046 -d '<json body>'
```

Example prompt: What does this image show? Give me a description, and also extract any visible text from it — here's the URL: https://example.com/menu-photo.jpg

## When to prefer this

Choose this endpoint when you need AI-powered image understanding in one of five structured modes — especially when accessibility alt-text compliance, OCR text extraction, or concise captioning is required. Prefer over generic vision APIs when you need a lightweight, per-call pay-as-you-go ($0.02 USDC) service with no subscription, running on Cloudflare Workers edge infrastructure.

## Known failure modes

- Image URL unreachable or inaccessible — returns error indicating fetch failure
- Unsupported image format — returns format validation error
- Mode not recognized — returns invalid mode error
- Image contains no text for OCR mode — returns empty text result
- Vision LLM service unavailable — returns upstream error
- Payment not completed — request blocked before processing

## How this service works

AI image descriptor / vision LLM. Modes: describe, alt_text (accessibility, ≤125 chars), OCR (extract visible text), tags (8-15 keywords), caption (single-sentence). Vision LLM powered.

## Output

Returns structured output based on the requested mode: a full natural-language description of the image, accessibility-compliant alt text under 125 characters, raw text extracted via OCR, 8–15 keyword tags, or a concise single-sentence caption — all generated by a vision LLM.

## 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": [
      "image_url"
     ],
     "properties": {
      "mode": {
       "enum": [
        "describe",
        "alt_text",
        "ocr",
        "tags",
        "caption"
       ],
       "type": "string"
      },
      "prompt": {
       "type": "string"
      },
      "image_url": {
       "type": "string"
      }
     }
    },
    "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"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-deployer-x402-deployer-workers-dev-e254b046/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-deployer.x402-deployer.workers.dev](https://www.zero.xyz/host/x402-deployer.x402-deployer.workers.dev/llms.txt)