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

> P0 Agent Economy Index – DKIM-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, $0.032/call, status unknown (last checked 2026-10-20).

Returns a ranked list of x402 services tagged 'dkim', scored by real 30-day call counts and paying-wallet activity, with snapshot provenance receipt.

## Facts

- Endpoint: GET https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-dkim?utm_source=zero.xyz
- Price: $0.032/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-dkim-tagged-x402-service-discovery-c85d4528
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Q8KvyArzyY7941RK3lkLi

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-dkim-tagged-x402-service-discovery-c85d4528
```

Example prompt: Show me the top 25 DKIM-tagged x402 services ranked by number of paying wallets over the last 30 days, with their call counts and prices.

## When to prefer this

Use this endpoint when you specifically need discovery of x402 services filtered to the 'dkim' tag and ranked by real economic signals (paying wallets, call counts) rather than self-reported metadata. Prefer this over generic API directories when you need cryptographic provenance (snapshot hash) of the ranking, or when your agent needs to select a DKIM-capable service based on actual 30-day market activity rather than vendor claims.

## Known failure modes

- No DKIM-tagged services found — returns empty services array with matched:0
- Upstream index unavailable — HTTP 5xx with no body or timeout
- Malformed query parameters — may return all services ignoring filter
- Stale snapshot — generatedAt timestamp may lag real-time by up to the indexing window
- Payment not settled — HTTP 402 response requiring x402 micropayment before data is returned

## 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 count of returned services (up to the limit), the query parameters used (ranking criterion, limit, tag filter), the route, the total number of matched services in the index, an array of ranked service objects (each with name, network, 30-day call count, USD price, resource URL, and 30-day payer count), who declared the data, and a generatedAt ISO timestamp anchoring the snapshot.

## 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": "dkim"
   }
  },
  "route": "/in-dkim",
  "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-dkim-tagged-x402-service-discovery-c85d4528/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)