# 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/v1/402-compliance?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-2852976b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_h5QlsqpJD8eJVZcNsWwqI

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-2852976b
```

Example prompt: Can you audit my MCP server at https://myagent.example.com/mcp and tell me if it's JSON-RPC compliant, passes latency SLA, and has proper HTTP 402 payment headers set up?

## When to prefer this

Use this endpoint when you need to programmatically verify that a remote agent, MCP, or x402-enabled service meets protocol compliance requirements — especially for JSON-RPC correctness, HTTP 402 payment header presence, OpenAPI schema validity, and latency SLA. Prefer this over manual testing or generic HTTP probing tools when auditing AI agent infrastructure for production readiness or third-party integration vetting.

## Known failure modes

- Target URL is unreachable or returns a network error
- Target URL does not expose a recognizable A2A, MCP, or x402 endpoint
- Response timeout if the audited service is slow or unresponsive
- Missing or malformed url parameter returns a validation error
- Target endpoint returns unexpected content type preventing schema validation

## 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/v1/402-compliance)

## Output

Returns a structured audit report covering JSON-RPC compliance status, measured latency against SLA thresholds, OpenAPI schema validation results, and HTTP 402 payment settlement header compliance 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/email-verify-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-2852976b/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)