# x402 Market Intelligence – Topic Search

> x402 Market Intelligence – Topic Search is a paid API for AI agents from x402-meta.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-21).

Search the x402 Bazaar by topic keyword to find matching paid API endpoints with pricing, 30-day call volume, and unique payer counts.

## Facts

- Endpoint: GET https://x402-meta.x402tookit.com/x402-search?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-market-intelligence-topic-search-4e374735
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Zf531e2UhNfiHOvm8oOuY

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-intelligence-topic-search-4e374735
```

Example prompt: Search the x402 Bazaar for endpoints related to 'token risk' and show me their prices, 30-day call volumes, and how many unique payers each one has.

## When to prefer this

Use this endpoint when you want to discover x402-protocol paid APIs by topic or subject matter and need real market data (pricing, usage volume, buyer counts) to evaluate options. Prefer this over manual Bazaar browsing or sibling endpoints when you have a plain-language topic in mind rather than a known service name or domain.

## Known failure modes

- Missing required query parameter 'q' returns validation error
- Empty or overly broad query returns zero or low-quality matches
- Bazaar data may be stale if the index has not been recently refreshed (degraded flag set)
- Niche or misspelled topics may return no results
- Payment failure ($0.02 USDC) prevents the request from completing

## How this service works

Search Coinbase's x402 Bazaar by topic: matching paid endpoints with price, 30-day calls and unique payers.

## Output

Returns a ranked list of matching x402 endpoints with their URL, host, service name, price in USD, 30-day call count, 30-day unique payer count, tags, network, and last-called timestamp. Also includes a summary, verdict, source attribution, data freshness timestamp, and any degraded-data warnings or disclaimers.

## 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": [
      "q"
     ],
     "properties": {
      "q": {
       "type": "string",
       "description": "Topic in plain words, e.g. token risk, funding rate"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "asOf": {
       "type": [
        "null",
        "string"
       ]
      },
      "query": {
       "type": [
        "null",
        "string"
       ]
      },
      "source": {
       "type": [
        "null",
        "string"
       ]
      },
      "reasons": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "results": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "object",
        "properties": {
         "url": {
          "type": [
           "null",
           "string"
          ]
         },
         "host": {
          "type": [
           "null",
           "string"
          ]
         },
         "tags": {
          "type": [
           "array",
           "null"
          ],
          "items": {
           "type": "string"
          }
         },
         "network": {
          "type": [
           "null",
           "string"
          ]
         },
         "service": {
          "type": [
           "null",
           "string"
          ]
         },
         "calls30d": {
          "type": [
           "null",
           "number"
          ]
         },
         "priceUsd": {
          "type": [
           "null",
           "number"
          ]
         },
         "payers30d": {
          "type": [
           "null",
           "number"
          ]
         },
         "description": {
          "type": [
           "null",
           "string"
          ]
         },
         "lastCalledAt": {
          "type": [
           "null",
           "string"
          ]
         }
 
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-market-intelligence-topic-search-4e374735/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-meta.x402tookit.com](https://www.zero.xyz/host/x402-meta.x402tookit.com/llms.txt)