# x402 Market Benchmark Tool

> x402 Market Benchmark Tool is a paid API for AI agents from gpt55.558686.xyz, paid per call via x402, $0.006/call, status unknown (last checked 2026-09-16).

Queries multiple x402 API discovery sources to benchmark market pricing and count AI-like endpoints for a given search query, including comparison against this gateway's own prices.

## Facts

- Endpoint: GET https://gpt55.558686.xyz/v1/tools/x402-market-benchmark
- Price: $0.006/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-market-benchmark-tool-5e56c14a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XGnq71bpYax2HQZDx1cs8

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-market-benchmark-tool-5e56c14a
```

Example prompt: Search the x402 market for 'artificial intelligence' endpoints across x402.direct and cdp-bazaar — limit to 50 results per page, 1 page, with a 5-second timeout — and tell me the median price, how many AI-like endpoints you found, and how $0.0001 compares to the market.

## When to prefer this

Use this endpoint when you need to benchmark API pricing across multiple x402 discovery directories for a specific category (e.g. 'AI', 'image generation'), understand the competitive pricing landscape before listing your own x402 API, or verify whether a given price point is above or below the market median. Not suitable for listing management, payment processing, or chat completions.

## Known failure modes

- Upstream discovery source timeout (source marked with warnings, partial results returned)
- Invalid query string (too long >120 chars or empty returns validation error)
- All sources fail to respond (ok: false with error message)
- limit or pages out of range (400 validation error)
- timeout_ms too low causing premature termination of source queries

## How this service works

Fetch public x402 directories and CDP x402 Bazaar search results, normalize advertised USDC prices, compare AI-like listings, surface active competitors, and return buyer/seller opportunity notes. This deterministic endpoint does not call an upstream model. GET variant for agents, crawlers, and wallets that prefer query parameters over a JSON body. Pay up to $0.006 per request with x402 USDC on Base.

## Output

Returns a JSON object with: ok status, tool name, query used, count of AI-like endpoints, count of priced endpoints, per-source breakdown (total items, AI-like count, priced count, warnings), aggregate price summary in USD (min, max, median, p25, p75, count), own price comparison array showing whether this gateway's prices are below market median, opportunity notes, fetch timestamp, and duration in milliseconds.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {
   "limit": 10,
   "pages": 1,
   "query": "artificial intelligence",
   "sources": [
    "x402.direct",
    "cdp-bazaar"
   ],
   "page_size": 50,
   "timeout_ms": 5000
  }
 }
}
```

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "query"
     ],
     "properties": {
      "limit": {
       "type": "integer",
       "maximum": 100,
       "minimum": 1
      },
      "pages": {
       "type": "integer",
       "maximum": 3,
       "minimum": 1
      },
      "query": {
       "type": "string",
       "maxLength": 120,
       "minLength": 1
      },
      "sources": {
       "type": "array",
       "items": {
        "enum": [
         "402index",
         "x402.direct",
         "x402scout",
         "cinderwright",
         "pay-sh",
         "cdp-bazaar",
         "agora402",
         "x402-list",
         "a2alist",
         "payai-discovery",
         "gate402"
        ],
        "type": "string"
       },
       "maxItems": 10
      },
      "page_size": {
       "type": "integer",
       "maximum": 100,
       "minimum": 10
      },
      "timeout_ms": {
       "type": "integer",
       "maximum": 15000,
       "minimum": 1000
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "ok": {
       "type": "boolean"
      },
      "tool": {
       "type": "string"
      },
      "fetchedAt": {
       "type": "string"
      }
     },
     "additionalProperties": true
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-market-benchmark-tool-5e56c14a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from gpt55.558686.xyz](https://www.zero.xyz/host/gpt55.558686.xyz/llms.txt)