# x402 Bazaar Rank – Perpetuals (Perps) Feed

> x402 Bazaar Rank – Perpetuals (Perps) Feed 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 2026-10-17).

Returns the top x402 pay-per-call services tagged 'perps' (perpetuals), ranked by 30-day paying-wallet count and call volume, with a signed snapshot receipt.

## Facts

- Endpoint: GET https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-perps?utm_source=zero.xyz
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-bazaar-rank-perpetuals-perps-feed-2e733dac
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_U6bF0iDrtr644z0aK9AD4

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-perps-feed-2e733dac
```

Example prompt: What are the top perpetuals trading APIs on the x402 marketplace right now — ranked by how many unique wallets have paid for them in the last 30 days?

## When to prefer this

Choose this endpoint when you specifically want to discover or rank perpetuals/perps-tagged x402 pay-per-call services by real 30-day usage metrics (paying wallets and call volume). It is the right choice over generic web search when you need verifiable on-chain usage signals rather than self-reported API directories, and when you want a cryptographically receipted snapshot for auditability. Prefer sibling endpoints for other tags (solana, options, leverage, usdc).

## Known failure modes

- No services tagged 'perps' indexed yet — returns empty services array with count 0
- Snapshot stale or worker cold-start — may return slightly outdated ranking data
- Rate limiting or payment failure — 402 response if USDC payment not accepted
- Malformed response if the underlying index is being rebuilt

## 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: the count of returned services (up to 25 by default), the query parameters used (ranking by payers, tag=perps), total matched services, and an array of ranked services each with name, network (EVM chain ID), 30-day call count, price in USD, resource URL, and 30-day unique paying wallets. Also includes a 'declaredBy' field, snapshot generation timestamp, and a receipt with snapshot hash and scoring revision 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": "perps"
   }
  },
  "route": "/in-perps",
  "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-perps-feed-2e733dac/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)