# 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 A2A, MCP, or x402 service 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/x402-mpp-paywall-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-f7e73a34
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CZmKwj8hYDzaAOTe-2tZa

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-f7e73a34
```

Example prompt: Can you audit https://myagent.example.com/mcp and tell me if it passes JSON-RPC compliance, meets latency SLA requirements, has a valid OpenAPI schema, and correctly implements HTTP 402 settlement headers?

## When to prefer this

Choose this endpoint when you need to programmatically verify that an A2A, MCP, or x402-enabled agent service is protocol-compliant before integrating it, deploying it, or listing it in an agent marketplace. It is especially useful when you need a single-call check covering JSON-RPC correctness, OpenAPI schema validity, HTTP 402 settlement headers, and latency SLA simultaneously, rather than running separate ad-hoc checks.

## Known failure modes

- Target URL is unreachable or times out — audit cannot complete
- Target URL returns non-standard response format that cannot be parsed
- Invalid or malformed URL provided as input
- Target endpoint blocks probe requests (firewall, auth-required) — partial or no results
- x402 headers absent on target — reported as non-compliant rather than an error

## 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/x402-mpp-paywall-verifier)

## Output

Returns a structured compliance report covering JSON-RPC protocol adherence, measured latency against SLA thresholds, OpenAPI schema validity assessment, and HTTP 402 / x402 payment header correctness for the audited endpoint 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/hn-pulse-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-auditor-f7e73a34/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)