# x402broker MPP Verifier - A2A & MCP SLA Compliance Auditor

> x402broker MPP Verifier - A2A & MCP SLA Compliance Auditor is a paid API for AI agents from x402broker.com, paid per call via x402 or MPP, $0.01/call, status unknown (last checked 2026-10-20).

Audits any remote agent, MCP, or HTTP 402 endpoint URL for JSON-RPC compliance, latency SLA, OpenAPI schema validity, and x402 payment settlement headers

## Facts

- Endpoint: GET https://x402broker.com/v1/mpp-verifier?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402, MPP
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402broker-mpp-verifier-a2a-mcp-sla-compliance-auditor-c53d889c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_PYSdEzJp3N0yKzYeqhmWO

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 x402broker-mpp-verifier-a2a-mcp-sla-compliance-auditor-c53d889c
```

Example prompt: Audit the endpoint at https://myagent.example.com/v1/agent using a GET request and tell me whether it passes JSON-RPC compliance, meets latency SLA, has a valid OpenAPI schema, and correctly returns HTTP 402 settlement headers.

## When to prefer this

Choose this endpoint when you need to programmatically verify that an A2A agent, MCP server, or HTTP 402-enabled API endpoint is compliant with JSON-RPC standards, x402 payment protocol headers, OpenAPI schema, and latency SLAs — especially before listing an agent on a marketplace, after deploying a new agent version, or as part of a CI/CD pipeline health check. Prefer this over manual testing tools when you need a single automated call that checks all four compliance dimensions at once.

## Known failure modes

- Target URL is unreachable or returns a non-2xx/402 response — audit cannot be completed
- Target endpoint times out, resulting in latency SLA failure being reported
- Malformed or missing URL query parameter causes request to be rejected
- Target does not implement JSON-RPC at all, resulting in full compliance failure
- Rate limiting or authentication on the target endpoint blocks the auditor's probe request

## How this service works

Audits any remote agent or MCP URL for JSON-RPC compliance, latency SLA, OpenAPI schema, and HTTP 402 settlement headers. (Live x402 v2, IETF MPP & MCP endpoint at https://x402broker.com/v1/mpp-verifier)

## Output

Returns a structured compliance report covering: JSON-RPC protocol conformance (pass/fail with details), latency SLA measurement and pass/fail verdict, OpenAPI schema validation results, and HTTP 402 payment settlement header presence and correctness — all for the audited remote URL.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "url"
 ],
 "properties": {
  "url": {
   "type": "string",
   "minLength": 1,
   "description": "Target A2A, MCP, or x402 service URL to audit for protocol compliance"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402broker-mpp-verifier-a2a-mcp-sla-compliance-auditor-c53d889c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402broker.com](https://www.zero.xyz/host/x402broker.com/llms.txt)