# A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor

> A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor is a paid API for AI agents from serp-extract.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-23).

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: POST https://serp-extract.agentdiet.dev/v1/usdc-quote-audit?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Provider: serp-extract.agentdiet.dev
- Website: https://serp-extract.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/serp-extract-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-9accd077
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JCYDaeq9adJo-wfhhZK39

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 serp-extract-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-9accd077 -d '<json body>'
```

Example prompt: Can you audit https://my-agent-service.example.com/mcp for JSON-RPC compliance, latency SLA, and HTTP 402 settlement headers and tell me if it passes?

## When to prefer this

Choose this endpoint when you need to programmatically verify that an A2A agent, MCP server, or x402-enabled service correctly implements protocol standards — including JSON-RPC conformance, HTTP 402 payment headers, OpenAPI schema validity, and latency SLA — before integrating with it or going live. It is especially useful for pre-integration vetting of third-party agents, automated CI/CD compliance gates, or diagnosing payment or protocol failures in existing services.

## Known failure modes

- Target URL unreachable or returns network error — audit cannot proceed
- Malformed or non-HTTP URL input — validation error returned
- Target endpoint does not implement JSON-RPC — compliance check fails with details
- HTTP 402 headers absent or malformed — flagged in report
- Latency exceeds SLA thresholds — SLA failure noted in output
- OpenAPI schema missing or invalid — schema validation section reports errors

## 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://serp-extract.agentdiet.dev/v1/usdc-quote-audit)

## Output

Returns a structured audit report covering JSON-RPC compliance status, latency SLA measurements, OpenAPI schema validation findings, and HTTP 402 / x402 payment settlement header inspection results for the target 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/serp-extract-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-9accd077/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from serp-extract.agentdiet.dev](https://www.zero.xyz/host/serp-extract.agentdiet.dev/llms.txt)