# x402 Bazaar Rank – In-Agent-Tool Discovery

> x402 Bazaar Rank – In-Agent-Tool Discovery is a paid API for AI agents from x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev, paid per call via x402, $0.008/call, status unknown (last checked 2026-10-20).

Returns a ranked list of x402 services tagged as agent-tools, scored by real 30-day call volume and unique paying-wallet counts, with a verifiable snapshot receipt.

## Facts

- Endpoint: GET https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-agent-tool?utm_source=zero.xyz
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-bazaar-rank-in-agent-tool-discovery-39b3f87f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_56D8nXS5gyw70KGNI5Y1P

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-bazaar-rank-in-agent-tool-discovery-39b3f87f
```

Example prompt: Show me the top 25 x402 agent-tool services ranked by number of unique paying wallets over the last 30 days, including their call counts and prices.

## When to prefer this

Choose this endpoint when you need real-usage-validated discovery of x402 agent-tool services — not just directory listings, but rankings grounded in actual 30-day call counts and unique paying wallets. It is especially useful when you want to identify which services have genuine market traction before integrating them into an agent workflow, or when you need a verifiable, timestamped snapshot of the x402 service market for auditing or reproducibility.

## Known failure modes

- No services matched the agent-tool tag — returns empty services array with count 0
- Snapshot index temporarily unavailable — may return stale or error response
- Rate limit or payment failure — 402 response requiring valid USDC payment of $0.008
- Malformed query parameters — may return 400 or unexpected empty results
- Network indexing lag — very recently listed services may not appear in 30-day window

## How this service works

An open index of the machine-to-machine (agent) economy. x402 routes: ranked discovery over the live x402 service market, every indexed service scored by real 30-day calls and paying-wallet bounds, with a receipt naming the snapshot hash and scoring revision. /economy routes, for Tempo MPP, Virtuals ACP, Olas, Masumi, ERC-8004 agent registries, Solana agent registries, Base agent contracts and MCP servers (Official MCP Registry): each protocol's published figures (agent or server counts, transactions or payment events; payers and USD volume only where the source publishes them: payers for x402 and Tempo MPP, USD volume for x402 and Virtuals ACP), each with its unit, window and source; units differ, so totals are not summed. L402 and per-service MPP listings are not covered.

## Output

A JSON object containing a ranked array of up to N x402 services (defaulting to 25), each with name, network chain ID, 30-day call count, 30-day unique payer wallet count, USD price, and resource URL. The response also includes total matched count, the query parameters used, the snapshot hash for verifiability, scoring revision, and a generation timestamp.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "count": 25,
  "query": {
   "by": "payers",
   "op": "top",
   "limit": 25,
   "where": {
    "tag": "agent-tool"
   }
  },
  "route": "/in-agent-tool",
  "matched": 359,
  "services": [
   {
    "name": "forecast api",
    "network": "eip155:8453",
    "calls30d": 310,
    "priceUsd": 0.01,
    "resource": "https://api.example.com/forecast",
    "payers30d": 42
   }
  ],
  "declaredBy": "agent",
  "generatedAt": "2026-09-17T12:00:00.000Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-bazaar-rank-in-agent-tool-discovery-39b3f87f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev](https://www.zero.xyz/host/x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/llms.txt)