# x402 Bazaar Rank – In-Gateway Discovery

> x402 Bazaar Rank – In-Gateway Discovery is a paid API for AI agents from x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev, paid per call via x402, $0.032/call, status unknown (last checked 2026-10-22).

Returns ranked, live-usage-scored listings of x402 gateway services, filtered and sorted 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-gateway?utm_source=zero.xyz
- Price: $0.032/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-bazaar-rank-in-gateway-discovery-b160b817
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_G_0xFSmMIrOQpmYk9UJQa

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-gateway-discovery-b160b817
```

Example prompt: Show me the top 25 x402 gateway services ranked by number of paying wallets over the last 30 days, so I can find the most actively used ones in the market right now.

## When to prefer this

Choose this endpoint when you need authoritative, usage-weighted discovery of x402 services specifically tagged as gateways, backed by verifiable 30-day real-transaction data. Prefer it over generic x402 directory listings when you need ranking by actual economic activity (calls and paying wallets) rather than self-declared metadata. Ideal for agents doing due diligence before integrating an x402 service or for ecosystem analytics.

## Known failure modes

- No services match the requested tag filter — returns empty services array with matched:0
- Invalid sort key or operator — may return 400 or unordered results
- Snapshot data stale if indexer is behind — generatedAt timestamp will reflect staleness
- Payment not settled (x402 $0.008 USDC) — request blocked before processing
- Rate limiting on Cloudflare Workers edge — transient 429 or 503 errors

## 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 list of x402 services (up to the requested limit) each with service name, network chain, 30-day call count, price in USD, resource URL, and unique payer count for the last 30 days. Also includes the total matched count, query parameters echoed back, the snapshot hash for verifiability, scoring revision, and the timestamp the snapshot was generated.

## 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": "gateway"
   }
  },
  "route": "/in-gateway",
  "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-gateway-discovery-b160b817/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)