# A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor

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

Audits a remote A2A agent, MCP server, or x402-enabled URL for JSON-RPC compliance, latency SLA, OpenAPI schema validity, and HTTP 402 payment settlement headers.

## Facts

- Endpoint: GET https://github-audit.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: github-audit.agentdiet.dev
- Website: https://github-audit.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/github-audit-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-453f01f1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hcgGvGR-nSfv5RZIpKPkR

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 github-audit-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-453f01f1
```

Example prompt: Can you audit my MCP server at https://myagent.example.com/mcp and tell me if it passes JSON-RPC compliance, latency SLA, and HTTP 402 payment header checks?

## When to prefer this

Choose this endpoint when you need a single-call compliance snapshot of an A2A agent, MCP server, or x402-paywalled URL — especially when you need to verify JSON-RPC correctness, latency SLA adherence, OpenAPI schema validity, and HTTP 402 header compliance together. It is particularly useful before deploying or listing an agent endpoint, or when debugging protocol failures in agent-to-agent communication stacks.

## Known failure modes

- Target URL is unreachable or returns a network error — audit fails with connection error
- Target URL does not implement any recognized protocol (A2A, MCP, x402) — report may return empty or unknown compliance status
- Malformed URL input — returns validation error requiring a valid URL string
- Target endpoint is behind authentication and returns 401/403 — audit may be incomplete or blocked
- Latency is highly variable at time of audit — SLA result may not reflect steady-state performance

## 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://github-audit.agentdiet.dev/v1/x402-mpp-paywall-verifier)

## Output

Returns a structured compliance report covering JSON-RPC protocol adherence, measured latency vs SLA thresholds, OpenAPI schema validity, and HTTP 402 / x402 v2 settlement header presence and correctness for the audited 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/github-audit-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-453f01f1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from github-audit.agentdiet.dev](https://www.zero.xyz/host/github-audit.agentdiet.dev/llms.txt)