# x402 Bazaar Rank – In-Research Services

> x402 Bazaar Rank – In-Research Services 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 x402 services tagged 'research', scored by real 30-day call volume and paying-wallet counts, with a snapshot hash receipt.

## Facts

- Endpoint: GET https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-research
- 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-in-research-services-06213262
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_60JWb7cApZR8MiIpOJcgg

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-research-services-06213262
```

Example prompt: Show me the top 25 research-tagged services on the x402 bazaar ranked by paying wallets over the last 30 days, including call volumes and prices.

## When to prefer this

Choose this endpoint when you need ranked, usage-verified discovery of x402 services in the research category specifically — it provides real payment and call-volume signals rather than self-reported metadata. Prefer over generic x402 service listings when you need to identify proven, actively-used research APIs with auditable snapshot receipts. Not suitable for non-research categories or if you need real-time per-service analytics rather than 30-day aggregates.

## Known failure modes

- No services indexed for the research tag returns an empty services array with count 0
- Snapshot hash mismatch may indicate stale or inconsistent data
- Payment of $0.008 USDC required per call; insufficient balance returns 402 Payment Required
- Cloudflare Worker cold-start may add latency on first call
- Index lag means very recently added services may not appear in 30-day stats

## 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: total matched service count, query parameters used, the route (/in-research), a list of ranked services (each with name, network chain ID, 30-day call count, price in USD, resource URL, and 30-day payer count), the declaring agent identifier, and a generation timestamp with snapshot hash 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": "research"
   }
  },
  "route": "/in-research",
  "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-research-services-06213262/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)