# P0 Agent Economy Index – UUID-Tagged x402 Service Discovery

> P0 Agent Economy Index – UUID-Tagged x402 Service Discovery 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 2026-10-20).

Returns a ranked list of x402 services filtered by UUID tag, scored by real 30-day call counts and paying-wallet bounds, with a snapshot receipt.

## Facts

- Endpoint: GET https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-uuid?utm_source=zero.xyz
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/p0-agent-economy-index-uuid-tagged-x402-service-discovery-8637bbcc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cc9hKuwFON-WXxC94VOsW

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 p0-agent-economy-index-uuid-tagged-x402-service-discovery-8637bbcc
```

Example prompt: Show me the top 25 x402 services tagged with UUID, ranked by number of paying wallets over the last 30 days, so I can see which APIs in the agent economy are actually getting real traction.

## When to prefer this

Choose this endpoint when you need ranked, usage-verified discovery of x402 services within a specific UUID-tagged category, particularly when real 30-day payer counts and call volumes matter more than self-reported metadata. Prefer it over generic API directories when you want a cryptographically receipted snapshot (hash + scoring revision) of the live agent economy market. Not appropriate for L402 services, per-service MPP listings, or cross-protocol aggregate totals (Tempo MPP, Virtuals ACP, Olas, etc.).

## Known failure modes

- Invalid or unrecognized UUID tag returns empty results or 404
- Payment of 0.008 USDC not received causes 402 Payment Required response
- Stale index if no services have been active in the 30-day window
- Malformed query parameters may return an error or unfiltered results
- Network timeout on the Cloudflare Worker edge node

## 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 x402 services matching the UUID tag, each with name, network (EIP-155 chain), 30-day call count, price in USD, resource URL, and 30-day payer count. Also includes the query metadata (operator, limit, filter), total matched count, who declared the service, and a generatedAt timestamp that serves as a snapshot receipt for the scoring revision.

## 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": "uuid"
   }
  },
  "route": "/in-uuid",
  "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/p0-agent-economy-index-uuid-tagged-x402-service-discovery-8637bbcc/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)