# x402 Bazaar Rank – MCP Security Tag

> x402 Bazaar Rank – MCP Security Tag 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 the top 25 x402 services tagged 'mcp-security', ranked by 30-day paying-wallet counts and call volumes, with a verifiable snapshot receipt.

## Facts

- Endpoint: GET https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/in-mcp-security?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-mcp-security-tag-3dcd1e17
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7i5YUPmgH0PhVF15DcAWV

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-mcp-security-tag-3dcd1e17
```

Example prompt: Show me the top 25 mcp-security services on the x402 bazaar ranked by paying wallets over the last 30 days, and tell me which snapshot hash you used.

## When to prefer this

Choose this endpoint when you specifically need to discover and rank x402 services in the mcp-security category by real economic activity (paying wallets and call counts) rather than self-reported metadata. It is ideal when you need a verifiable, receipted snapshot — not a static directory or unverified listing. Prefer this over generic API directories when you want proof of real 30-day usage as a quality signal.

## Known failure modes

- No services indexed under the mcp-security tag — returns empty list with count 0
- Snapshot data stale if the indexer has not refreshed recently
- Payment failure (HTTP 402) if the $0.032 USDC per-call fee is not satisfied
- Worker timeout or cold-start latency on Cloudflare edge if traffic is low
- Schema mismatch if the response format has been updated but client expects legacy shape

## 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 up to 25 ranked services in the 'mcp-security' tag, each with name, network, 30-day call count, price in USD, resource URL, and 30-day unique payer count. The envelope includes the total matched count (359), the query parameters used, the route, a declaredBy field, and a generatedAt ISO timestamp plus snapshot hash for auditability.

## 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": "mcp-security"
   }
  },
  "route": "/in-mcp-security",
  "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-mcp-security-tag-3dcd1e17/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)