# x402 Bazaar Rank – Signals Category

> x402 Bazaar Rank – Signals Category 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 2026-10-21).

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

## Facts

- Endpoint: GET https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-signals?utm_source=zero.xyz
- Price: $0.032/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-bazaar-rank-signals-category-368f29c2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kUS35hLTrt8wrXpYypvah

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-signals-category-368f29c2
```

Example prompt: Show me the top 25 signals services on the x402 bazaar ranked by number of paying wallets over the last 30 days, so I can find which signals APIs have real proven demand.

## When to prefer this

Choose this endpoint when you specifically want ranked discovery of x402 services in the signals category, with usage metrics (calls and payers) validated over 30 real days and an auditable snapshot receipt. Prefer it over generic API directories when you need evidence of actual economic activity rather than just listings, and when the signals domain tag is the relevant filter.

## Known failure modes

- No services indexed under the 'signals' tag returns count:0 with an empty services array
- Payment not included or rejected returns HTTP 402 with payment instructions
- Snapshot index temporarily unavailable returns 503 or empty result set
- Malformed query parameters may return 400 or fall back to defaults
- Stale data if the 30-day index has not refreshed recently

## 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 a ranked array of up to 25 signals-tagged x402 services, each with name, network ID, 30-day call count, 30-day unique payer count, price in USD, and resource URL. Also includes total matched service count, the query parameters used, the route path, who declared the ranking, a snapshot hash for auditability, and a generation 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": "signals"
   }
  },
  "route": "/in-signals",
  "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-signals-category-368f29c2/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)