# x402 Bazaar Rank – Readability Services

> x402 Bazaar Rank – Readability 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 the top x402 services tagged 'readability', ordered by 30-day paying-wallet activity, with a verifiable snapshot receipt.

## Facts

- Endpoint: GET https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-readability?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-readability-services-4cbecb95
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_PO2kGRZMgTk2PJmszTxpP

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-readability-services-4cbecb95
```

Example prompt: Show me the top 25 readability services on the x402 market right now, ranked by unique paying wallets over the last 30 days — I want real usage data, not just listings.

## When to prefer this

Choose this endpoint when you need evidence-based discovery of readability-tagged x402 services backed by actual 30-day payment telemetry rather than self-declared listings. It is the right choice when you want a verifiable, auditable snapshot (hash + scoring revision) of the readability service market, as opposed to raw crawl data or unranked directories. Prefer it over generic API registries when the x402 payment protocol context matters.

## Known failure modes

- No services indexed under the readability tag — returns empty services array with matched:0
- Snapshot index stale or unavailable — may return 402 or 503 if the worker is unreachable
- Payment not attached or USDC balance insufficient — returns HTTP 402 requiring x402 payment
- Malformed query parameters — may return 400 with error details
- Rate limiting on the Cloudflare Worker — returns 429

## 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 count of returned services, the query parameters used (by payers, top N, readability tag), the total number of matched services in the index, an array of ranked service entries each with name, network, 30-day call count, price in USD, resource URL, and 30-day unique paying wallets, plus metadata fields for who declared it and the snapshot 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": "readability"
   }
  },
  "route": "/in-readability",
  "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-readability-services-4cbecb95/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)