# x402 Bazaar Rank – In-x402 Tag Discovery

> x402 Bazaar Rank – In-x402 Tag 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 2026-09-18).

Returns a ranked list of x402 payment-gated services tagged 'x402', scored by real 30-day call volume and paying-wallet counts, with a verifiable snapshot receipt.

## Facts

- Endpoint: GET https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-x402
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-bazaar-rank-in-x402-tag-discovery-f60b43f7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kRDrgWSrfawiXkYhQ3PsV

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-x402-tag-discovery-f60b43f7
```

Example prompt: Show me the top 25 x402-tagged services ranked by number of paying wallets over the last 30 days, using the x402 Bazaar snapshot.

## When to prefer this

Choose this endpoint when you specifically need ranked discovery of x402-protocol services filtered by the 'x402' tag, with real 30-day usage signals (calls and unique paying wallets) rather than self-reported or static listings. It is distinct from generic API directories because it uses on-chain payment activity as its ranking signal and returns a verifiable snapshot receipt for auditability.

## Known failure modes

- No services match the x402 tag filter — returns empty results array
- Snapshot index stale or unavailable — may return cached or error response
- Payment not completed — 402 response blocking access
- Rate limit exceeded for the $0.008/call pricing tier
- Malformed query parameters — generic error or empty result set

## How this service works

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.

## Output

A JSON object containing a ranked array of up to 25 x402-tagged services, each with name, network (e.g. eip155:8453), 30-day call count, price in USD, resource URL, and 30-day payer count; plus query metadata, total matched count (e.g. 359), a snapshot hash for verifiability, scoring revision, and 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": "x402"
   }
  },
  "route": "/in-x402",
  "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-x402-tag-discovery-f60b43f7/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)