# A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor

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

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

## Facts

- Endpoint: GET https://email-verify.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: email-verify.agentdiet.dev
- Website: https://email-verify.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/email-verify-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-1d2fa2d4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FFFQMY-rJ0Lp12DR2oL81

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 email-verify-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-1d2fa2d4
```

Example prompt: Can you audit https://myagent.example.com/mcp for JSON-RPC compliance, latency SLA, and HTTP 402 payment header correctness — I want to know if it passes A2A and MCP protocol standards?

## When to prefer this

Use this endpoint when you need to programmatically verify that an A2A agent, MCP server, or x402 payment-gated API URL conforms to JSON-RPC, OpenAPI, IETF MPP, and HTTP 402 x402 v2 protocol standards — especially before integrating a third-party agent service, deploying your own MCP endpoint to production, or monitoring ongoing SLA compliance of agent infrastructure

## Known failure modes

- Target URL is unreachable or times out — audit fails with connection error
- Invalid or malformed URL provided — returns validation error
- Target endpoint returns unexpected non-JSON response — JSON-RPC compliance check fails
- Target URL has no HTTP 402 headers — reported as non-compliant for x402
- Network restrictions or firewall blocks audit probe — partial or failed results

## 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://email-verify.agentdiet.dev/v1/usdc-quote-audit)

## Output

Returns a structured compliance report covering JSON-RPC protocol adherence, measured latency vs SLA thresholds, OpenAPI schema validity findings, and HTTP 402 / x402 settlement header inspection results 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/email-verify-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-1d2fa2d4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from email-verify.agentdiet.dev](https://www.zero.xyz/host/email-verify.agentdiet.dev/llms.txt)