# x402 Bazaar Rank – In-Momentum Services

> x402 Bazaar Rank – In-Momentum Services 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 2026-10-02).

Returns a ranked list of x402 services tagged 'momentum', scored by real 30-day call volume and unique paying-wallet counts, with a verifiable snapshot receipt.

## Facts

- Endpoint: GET https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-momentum?utm_source=zero.xyz
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-bazaar-rank-in-momentum-services-6a2204c4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wwq0_FDAFLMyKDXhTwyor

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-momentum-services-6a2204c4
```

Example prompt: Show me the top 25 x402 services tagged momentum right now, ranked by unique paying wallets over the last 30 days, with their call counts and prices — and include the snapshot hash so I can verify the data.

## When to prefer this

Choose this endpoint when you need a real-usage-backed ranked view of x402 services specifically filtered to the 'momentum' tag — i.e. services that are actively gaining traction measured by paying wallets, not just declared availability. Prefer this over generic x402 directory endpoints when you want verifiable, snapshot-anchored rankings rather than static listings, and when 30-day payer count is the primary signal you trust for service quality.

## Known failure modes

- No services match the momentum tag — returns empty services array with count 0
- Snapshot index temporarily stale — generatedAt timestamp may lag real-time by up to minutes
- Network error from Cloudflare Worker — HTTP 500 or 503 with no body
- Payment not processed — HTTP 402 returned if x402 payment header is missing or invalid
- Rate limiting — HTTP 429 if too many calls from same wallet in a short window

## 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 a list of up to 25 (configurable) x402 services tagged 'momentum', each with name, EVM network, 30-day call count, price in USD, resource URL, and 30-day unique payer count. Also includes query metadata (operator, limit, tag), total matched count, a snapshot hash for verifiability, scoring revision, declared-by field, and a generatedAt ISO 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": "momentum"
   }
  },
  "route": "/in-momentum",
  "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-momentum-services-6a2204c4/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)