# x402 Bazaar Rank – AI Services Discovery

> x402 Bazaar Rank – AI Services Discovery is a paid API for AI agents from x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-18).

Returns a ranked list of live x402 AI-tagged services ordered 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-ai
- Price: $0.004/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-ai-services-discovery-0d6f536e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MEcfgbnwNpl_zjKyjsfet

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-ai-services-discovery-0d6f536e
```

Example prompt: Show me the top 25 AI services on the x402 bazaar ranked by number of paying wallets over the last 30 days, with their prices and call volumes.

## When to prefer this

Use this endpoint when you need authoritative, usage-weighted rankings of AI services in the x402 ecosystem specifically — it provides real 30-day on-chain call and payer data with a verifiable snapshot receipt, making it more trustworthy than static directory listings. Prefer it over generic API directories when you need to compare live market activity, identify trending services, or validate that an x402 AI service has genuine paying users before integrating it.

## Known failure modes

- No services indexed yet — returns empty array with count:0
- Network or Cloudflare Worker timeout — HTTP 5xx
- Malformed query parameters — HTTP 4xx with error message
- Snapshot data stale if indexer has not refreshed recently
- Rate limit exceeded if called too frequently without payment

## 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 AI-tagged x402 services, each with name, network (e.g. eip155:8453), 30-day call count, price in USD, resource URL, and unique payer count over 30 days. Also includes query metadata (ranking criterion, operator, limit, tag filter), total matched count, declaration source, snapshot generation timestamp, and a receipt identifying the snapshot hash and scoring revision for verifiability.

## 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": "ai"
   }
  },
  "route": "/in-ai",
  "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-ai-services-discovery-0d6f536e/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)