# x402 Bazaar Rank – In-Agent Service Discovery

> x402 Bazaar Rank – In-Agent Service 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 2026-10-21).

Returns a ranked list of live x402 agent-facing services tagged 'agent-service', scored by real 30-day call volume and unique paying-wallet counts, with a signed snapshot receipt.

## Facts

- Endpoint: GET https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-agent-service?utm_source=zero.xyz
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-bazaar-rank-in-agent-service-discovery-5f904831
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CodPcoZcaAWpQ-HmqA7gR

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-service-discovery-5f904831
```

Example prompt: Pull up the current x402 Bazaar leaderboard for agent services — I want to see the top 25 ranked by unique paying wallets over the last 30 days, including their prices and call volumes.

## When to prefer this

Choose this endpoint when an agent needs to discover which x402 services are actually being used in production, ranked by genuine economic activity (paying wallets, call volume) rather than self-reported listings. Prefer it over generic API directories when you need market-validated rankings specifically within the x402 protocol ecosystem and want an auditable snapshot receipt. It is most useful for agent orchestrators evaluating which APIs to trust or integrate, or for monitoring market trends in the x402 agent-service economy.

## Known failure modes

- No services indexed yet — returns empty list with count 0
- Snapshot unavailable — may return stale or cached data without a fresh hash
- Invalid or unrecognized query parameters ignored silently
- Rate limit exceeded or payment not processed — 402 response requiring USDC payment
- Upstream indexer lag — 30-day counts may be slightly stale during reindexing

## 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 25 (or configured limit) x402 services tagged 'agent-service', each with name, network/chain, 30-day call count, price in USD, resource URL, and unique paying wallets in the last 30 days. Also includes total matched count, query metadata, the route used, who declared it, and a generatedAt timestamp with snapshot hash and scoring revision for auditability.

## 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-service"
   }
  },
  "route": "/in-agent-service",
  "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-service-discovery-5f904831/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)