# A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor

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

Audits any 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://mcp-compiler.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: mcp-compiler.agentdiet.dev
- Website: https://mcp-compiler.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/mcp-compiler-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-1deb4ecf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pemv0B60o3fWIaUdHC4g6

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 mcp-compiler-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-1deb4ecf
```

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

## When to prefer this

Choose this endpoint when you need to programmatically verify that an A2A agent, MCP server, or x402-gated service conforms to protocol standards — specifically JSON-RPC compliance, HTTP 402 settlement headers, OpenAPI schema structure, and latency SLA. Prefer this over manual inspection or generic HTTP testing tools when dealing with AI agent infrastructure that must meet interoperability standards for multi-agent orchestration or payment-gated access.

## Known failure modes

- Target URL is unreachable or returns a non-2xx/402 response — audit fails with connectivity error
- Target URL does not expose a machine-readable OpenAPI schema — schema audit section may be skipped or incomplete
- High-latency or timeout on the target endpoint may cause SLA check to report failure even for otherwise valid services
- Malformed or missing x402 headers result in partial audit with compliance failure flagged for HTTP 402 section
- Invalid or non-URL input for the 'url' parameter returns a validation error before the audit begins

## 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://mcp-compiler.agentdiet.dev/v1/x402-mpp-paywall-verifier)

## Output

Returns a structured audit report covering JSON-RPC spec compliance, measured latency vs SLA thresholds, OpenAPI schema validation results, and HTTP 402/x402 payment settlement header conformance 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/mcp-compiler-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-1deb4ecf/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcp-compiler.agentdiet.dev](https://www.zero.xyz/host/mcp-compiler.agentdiet.dev/llms.txt)