# x402 Bazaar Rank – Perpetuals Filter

> x402 Bazaar Rank – Perpetuals Filter 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 2026-10-23).

Returns a ranked list of x402 services tagged 'perpetuals', ordered by real 30-day call volume and paying-wallet activity, with a signed snapshot receipt.

## Facts

- Endpoint: GET https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-perpetuals?utm_source=zero.xyz
- Price: $0.032/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-bazaar-rank-perpetuals-filter-d41a616a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8wCRIYX14D1ZzPK8nEnnV

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-perpetuals-filter-d41a616a
```

Example prompt: Show me the top 25 x402 services in the perpetuals category, ranked by the number of paying wallets over the last 30 days, and include the snapshot hash so I can verify the data.

## When to prefer this

Choose this endpoint when you need ranked, usage-verified discovery of x402 perpetuals services with real 30-day call and payer data — not just a static directory listing. It is specifically useful when you need a cryptographically receipted snapshot (snapshot hash + scoring revision) for auditability, and when you want to filter specifically to the perpetuals domain rather than the full x402 service market.

## Known failure modes

- No services indexed under 'perpetuals' tag returns an empty services array with count 0
- Stale snapshot if the index hasn't been updated recently — check generatedAt timestamp
- Payment failure (402) if USDC payment of $0.032 is not attached to the request
- Network timeout if the Cloudflare Worker is under load
- Malformed response if the scoring revision changes mid-flight

## How this service works

Highest-demand x402 services tagged 'perpetuals': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 48 providers and 101 paying wallets measured in this tag.

## Output

A JSON object containing a count of matched services, the query parameters used (ranking by payers, top 25, tag=perpetuals), the route, total matched services, and an array of ranked service entries each with name, network, 30-day call count, USD price, resource URL, and payer count — plus a declaredBy field, snapshot generation timestamp, and scoring revision receipt.

## 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": "perpetuals"
   }
  },
  "route": "/in-perpetuals",
  "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-perpetuals-filter-d41a616a/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)