# x402 Bazaar Rank – Free-Tagged Services

> x402 Bazaar Rank – Free-Tagged 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 2026-10-22).

Returns a ranked list of x402 services tagged 'free', scored by real 30-day call volume and unique 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-free?utm_source=zero.xyz
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-bazaar-rank-free-tagged-services-05f394fd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-bFRRTL9NEfvEuQ-gfNiS

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-free-tagged-services-05f394fd
```

Example prompt: Show me the top 25 free x402 services right now, ranked by how many unique paying wallets they've had in the last 30 days, and include the snapshot hash so I can verify the data freshness.

## When to prefer this

Choose this endpoint when you specifically want to discover x402-protocol services that are free (zero or near-zero cost), ranked by authentic on-chain usage signals (30-day calls and unique paying wallets). It is preferable over generic API directories when you need verifiable, blockchain-sourced popularity metrics and a tamper-evident snapshot receipt. Use it when building agents that need to auto-select free x402 services or when auditing the free-tier x402 marketplace.

## Known failure modes

- No services matched the 'free' tag filter — returns empty services array with count 0
- Snapshot index temporarily unavailable — may return stale or error response
- Payment of $0.008 USDC not completed — 402 Payment Required response blocks access
- Malformed query parameters — may return 400 or unexpected empty results
- Rate limiting or worker timeout on Cloudflare edge — 503 or timeout error

## How this service works

Use when an agent needs the top x402 services tagged 'free'. Returns Highest-demand x402 services tagged 'free': ranked by 30-day unique paying wallets, with calls, price, network and calls-per-payer for each. 200 providers and 200 paying wallets measured in this tag.

## Output

A JSON object containing a ranked list of x402 services tagged 'free', each with name, network chain ID, 30-day call count, price in USD, resource URL, and 30-day unique paying wallet count. Also includes total matched count, query parameters echoed back, the route used, a declared-by field, a generated timestamp, and a snapshot hash plus scoring revision for auditability.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "generatedAt",
  "route",
  "declaredBy",
  "query",
  "matched",
  "count",
  "services"
 ],
 "properties": {
  "count": {
   "type": "number"
  },
  "query": {
   "type": "object",
   "properties": {
    "by": {
     "type": "string"
    },
    "op": {
     "type": "string"
    },
    "limit": {
     "type": "number"
    },
    "where": {
     "type": "object",
     "properties": {
      "tag": {
       "type": "string"
      }
     }
    }
   }
  },
  "route": {
   "type": "string"
  },
  "matched": {
   "type": "number"
  },
  "services": {
   "type": "array",
   "items": {
    "type": "object",
    "properties": {
     "name": {
      "type": "string"
     },
     "network": {
      "type": "string"
     },
     "calls30d": {
      "type": "number"
     },
     "priceUsd": {
      "type": "number"
     },
     "resource": {
      "type": "string"
     },
     "payers30d": {
      "type": "number"
     }
    }
   }
  },
  "declaredBy": {
   "type": "string"
  },
  "generatedAt": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-bazaar-rank-free-tagged-services-05f394fd/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)