# P0 Agent Economy Index – Whale-Tracking Services Discovery

> P0 Agent Economy Index – Whale-Tracking Services Discovery is a paid API for AI agents from x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev, paid per call via x402, $0.048/call, status unknown (last checked 2026-10-27).

Returns the top x402 services tagged 'whale-tracking', ranked by 30-day payer count, with call volume, pricing, and snapshot metadata

## Facts

- Endpoint: GET https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-whale-tracking?utm_source=zero.xyz
- Price: $0.048/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-27
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/p0-agent-economy-index-whale-tracking-services-discovery-ec54c343
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tSQi2oxwXKE3Aax55rcLV

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-whale-tracking-services-discovery-ec54c343
```

Example prompt: Show me the top 25 whale-tracking services in the x402 agent economy right now — I want to see which ones have the most paying wallets over the last 30 days along with their call counts and prices.

## When to prefer this

Use this endpoint when you need ranked, real-usage-backed discovery of x402 services specifically tagged 'whale-tracking' — it provides verified 30-day call and payer metrics rather than static listings, making it superior to generic service directories when evaluating which whale-monitoring APIs have genuine adoption in the agent economy. Prefer it over broader economy index routes when your use case is specifically about whale tracking.

## Known failure modes

- No services tagged 'whale-tracking' currently indexed — returns empty services array with matched:0
- Service temporarily unavailable due to Cloudflare Worker cold start or upstream index staleness
- Payment rejected if USDC balance insufficient for the $0.048 per-call fee via x402
- Stale snapshot if the 30-day rolling window hasn't refreshed since last index update
- Schema mismatch if the upstream x402 index changes its ranking revision without notice

## 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 the route path, query parameters used (ranking by payers, top-25 limit, whale-tracking tag), total matched service count, and an array of up to 25 services each with name, network, 30-day call count, USD price, resource URL, and 30-day payer count — plus a generatedAt timestamp and declaredBy field indicating the snapshot source.

## 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": "whale-tracking"
   }
  },
  "route": "/in-whale-tracking",
  "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-whale-tracking-services-discovery-ec54c343/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)