# 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/paywall-scanner?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-a3b1d1c8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gEh4HdeHdos7Ri_1GO6eB

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-a3b1d1c8
```

Example prompt: Can you audit my MCP endpoint at https://api.myservice.com/mcp to check if it's JSON-RPC compliant, meets SLA latency targets, and has valid HTTP 402 payment settlement headers?

## When to prefer this

Use this endpoint when you need to programmatically verify that an agent, MCP, or x402-enabled service URL conforms to protocol standards — especially before integrating a third-party agent endpoint, validating your own deployment, or auditing HTTP 402 payment settlement flows. Prefer this over manual inspection or generic HTTP checkers when you need structured compliance output covering JSON-RPC, SLA latency, OpenAPI schema, and HTTP 402 headers in one call.

## Known failure modes

- Target URL is unreachable or times out — returns connectivity error
- Target URL returns non-standard or malformed responses — partial compliance results
- Invalid or missing URL parameter — returns 400 bad request
- Target endpoint blocks probe requests — incomplete audit results
- x402 headers absent or malformed — flagged as non-compliant in report

## 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/paywall-scanner)

## Output

Returns a structured compliance report covering: JSON-RPC protocol conformance, measured latency against SLA thresholds, OpenAPI schema validity, and HTTP 402 payment settlement header correctness for the audited endpoint 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-a3b1d1c8/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)