# x402 Bazaar Rank – Deterministic Services

> x402 Bazaar Rank – Deterministic 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 2026-10-15).

Returns a ranked list of deterministic x402 services scored by 30-day call volume and paying-wallet counts, with a snapshot hash and scoring revision receipt.

## Facts

- Endpoint: GET https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-deterministic?utm_source=zero.xyz
- Price: $0.032/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-bazaar-rank-deterministic-services-f1a80875
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_smxbF2-WJRO4s-V4BRvKd

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-deterministic-services-f1a80875
```

Example prompt: Show me the top 25 deterministic services in the x402 bazaar ranked by number of paying wallets over the last 30 days, so I can see which APIs have real proven usage.

## When to prefer this

Choose this endpoint when you need ranked, usage-validated discovery of deterministic x402 services specifically — it combines real 30-day call and payer data with a cryptographic snapshot receipt, making it more trustworthy than static registries. Prefer it over generic x402 service lists when you want to identify which deterministic APIs have genuine market adoption rather than just being listed.

## Known failure modes

- No services match the deterministic tag filter — returns empty services array with matched:0
- Snapshot data is stale if the bazaar index hasn't been refreshed recently — generatedAt timestamp reveals age
- Invalid or missing query parameters may return a 400 error
- Service may return partial data if the x402scan index is incomplete
- Payment of 0.032 USDC required per call — unpaid requests return HTTP 402

## 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: total matched service count, the query parameters used, a list of up to 25 ranked services each with name, network chain ID, 30-day call count, USD price, resource URL, and 30-day unique payer count, plus metadata fields for who declared the data, the snapshot generation timestamp, and a 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": "deterministic"
   }
  },
  "route": "/in-deterministic",
  "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-deterministic-services-f1a80875/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)