# A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor

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

Audits a remote A2A, MCP, or x402 service URL for JSON-RPC compliance, latency SLA, OpenAPI schema validity, and HTTP 402 payment settlement headers.

## Facts

- Endpoint: GET https://cve-intel.agentdiet.dev/v1/x402-mpp-paywall-verifier?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: cve-intel.agentdiet.dev
- Website: https://cve-intel.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/cve-intel-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-0a83b74a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qalSjl-CgxagttezxXXJO

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 cve-intel-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-0a83b74a
```

Example prompt: Can you audit https://my-agent.example.com/mcp for JSON-RPC compliance, latency SLA, OpenAPI schema validity, and HTTP 402 settlement headers?

## When to prefer this

Choose this endpoint when you need to programmatically verify that a remote agent, MCP server, or x402 paywall endpoint meets protocol compliance standards (JSON-RPC, OpenAPI, IETF MPP, x402 v2) and latency SLA before integration or during ongoing monitoring. Prefer this over manual inspection or generic HTTP health checks when agent interoperability and payment settlement correctness are the specific concern.

## Known failure modes

- Target URL is unreachable or times out — audit fails with connectivity error
- Target URL does not expose a supported protocol (A2A/MCP/x402) — compliance checks return unsupported or N/A
- Malformed URL input — validation error returned before any probe
- HTTP 402 headers absent on a non-paywall endpoint — 402 check returns not-applicable
- Intermittent network conditions causing inconsistent latency SLA 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://cve-intel.agentdiet.dev/v1/x402-mpp-paywall-verifier)

## Output

Returns a structured compliance report covering JSON-RPC conformance, measured latency vs SLA thresholds, OpenAPI schema validity, and the presence/correctness of HTTP 402 (x402 v2) and IETF MPP settlement headers 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/cve-intel-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-0a83b74a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from cve-intel.agentdiet.dev](https://www.zero.xyz/host/cve-intel.agentdiet.dev/llms.txt)