# A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor

> A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor is a paid API for AI agents from hn-pulse.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).

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

## Facts

- Endpoint: GET https://hn-pulse.agentdiet.dev/v1/mpp-verifier?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: hn-pulse.agentdiet.dev
- Website: https://hn-pulse.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/hn-pulse-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-auditor-a009f889
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_C0bQwGq7gx2Q7WjudxDTj

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 hn-pulse-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-auditor-a009f889
```

Example prompt: Can you audit https://some-agent.example.com/mcp for JSON-RPC compliance, check its latency SLA, and tell me if it has valid HTTP 402 x402 payment headers configured?

## When to prefer this

Use this endpoint when you need to programmatically verify that a remote agent, MCP server, or x402 payment endpoint meets protocol compliance standards before integrating it into an agent pipeline, or when monitoring existing endpoints for SLA drift, JSON-RPC correctness, or HTTP 402 payment header validity. Prefer this over manual inspection or generic HTTP testers when you need structured compliance output covering all three dimensions: protocol, latency, and payment headers.

## Known failure modes

- Target URL is unreachable or returns a non-2xx/402 response — audit fails with connectivity error
- Invalid or malformed URL input — returns validation error
- Target endpoint does not implement any recognized protocol (A2A/MCP/x402) — returns non-compliant result
- Timeout if the target endpoint is too slow — may report SLA failure
- Response schema is empty object — detailed structured errors may be limited

## 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://hn-pulse.agentdiet.dev/v1/mpp-verifier)

## Output

Returns a compliance report object including JSON-RPC conformance status, latency SLA measurement, OpenAPI schema validation result, HTTP 402 / x402 payment header presence and validity, and overall SLA pass/fail verdict for the audited endpoint.

## 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/hn-pulse-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-auditor-a009f889/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from hn-pulse.agentdiet.dev](https://www.zero.xyz/host/hn-pulse.agentdiet.dev/llms.txt)