# 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 2026-10-21).

Audits any remote A2A agent, MCP, or HTTP 402 (x402) URL for JSON-RPC compliance, latency SLA, OpenAPI schema validity, and payment settlement header correctness.

## Facts

- Endpoint: GET https://serp-extract.agentdiet.dev/v1/usdc-quote-audit?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- 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-68cd6fda
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_uO3_R85WFSChIQqmK3jc_

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-68cd6fda
```

Example prompt: Can you audit my MCP server at https://myagent.example.com/mcp for JSON-RPC compliance, latency SLA, and HTTP 402 payment header correctness?

## When to prefer this

Use this endpoint when you need to verify that a remote A2A agent, MCP server, or HTTP 402 x402 payment endpoint is correctly implementing its protocol — especially before integrating it into an agent pipeline, publishing it to a marketplace, or trusting it with payment settlement. Prefer this over generic HTTP monitoring tools because it understands A2A, MCP, JSON-RPC, and x402 semantics specifically.

## Known failure modes

- Target URL is unreachable or returns a network error — audit fails with connection error
- Target URL is not an A2A/MCP/x402 endpoint — audit returns low compliance scores or unexpected schema
- Malformed URL input — validation error returned
- Target endpoint returns non-standard HTTP codes that cannot be interpreted — partial audit result
- Timeout on slow target endpoints — latency SLA flagged as failed

## 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 compliance audit report covering JSON-RPC protocol adherence, latency SLA pass/fail, OpenAPI schema validity, and HTTP 402 settlement header inspection for the submitted 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"
  },
  "limit": {
   "type": "integer",
   "default": 20,
   "maximum": 100,
   "minimum": 1,
   "description": "Maximum number of items to return per page (1-100)"
  },
  "cursor": {
   "type": "string",
   "description": "Opaque pagination cursor for fetching the next page"
  }
 }
}
```

## 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-68cd6fda/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)