# x402 Bazaar Rank – FX Services

> x402 Bazaar Rank – FX Services 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 2026-10-13).

Returns a ranked list of live x402 FX (foreign exchange / currency) services scored by real 30-day call volume and paying-wallet counts, with a signed snapshot receipt.

## Facts

- Endpoint: GET https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-fx?utm_source=zero.xyz
- Price: $0.032/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-bazaar-rank-fx-services-329f2c99
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_WHfYB2Vmv0zCbMO8WC5H3

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-fx-services-329f2c99
```

Example prompt: Show me the top 25 x402 FX services ranked by paying wallets over the last 30 days, so I can find the most actively used currency exchange APIs on the bazaar.

## When to prefer this

Use this endpoint when you need a usage-grounded ranking of x402 FX services specifically — it combines real 30-day call and payer data rather than static listings, making it ideal for agent routing decisions, ecosystem monitoring, or due diligence on which FX micropayment APIs are genuinely active. Prefer it over generic API directories when you need on-chain-verified activity signals scoped to the fx tag.

## Known failure modes

- No FX-tagged services indexed yet — returns empty services array with matched:0
- Snapshot data stale if indexer hasn't run recently — generatedAt timestamp may lag real-time
- Rate limit or payment failure returns 402 if USDC payment not attached
- Worker cold-start latency on first call after idle period
- Malformed query parameters may return 400 or empty results

## 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 ranked list of FX-tagged x402 services (up to the requested limit), each with name, network, 30-day call count, 30-day unique payer count, price in USD, and resource URL. Also includes total matched count, the query parameters echoed back, a snapshot hash for auditability, the scoring revision, and a generatedAt timestamp.

## 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": "fx"
   }
  },
  "route": "/in-fx",
  "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-fx-services-329f2c99/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)