# A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor

> A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor is a paid API for AI agents from domain-osint.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 settlement header conformance

## Facts

- Endpoint: GET https://domain-osint.agentdiet.dev/v1/preflight/certify?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: domain-osint.agentdiet.dev
- Website: https://domain-osint.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/domain-osint-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-efb317f1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_h05JwQdy5KWY9_2Ni2Onc

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 domain-osint-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-efb317f1
```

Example prompt: Can you audit my MCP server at https://my-agent.example.com/mcp for JSON-RPC compliance, latency SLA, and HTTP 402 payment header correctness?

## When to prefer this

Use this endpoint when you need to programmatically verify that an agent, MCP server, or x402-enabled service conforms to protocol standards before integration or deployment — especially when checking JSON-RPC correctness, HTTP 402 / x402 v2 payment headers, OpenAPI schema presence, and latency SLA thresholds in a single call. Prefer this over manual inspection or generic HTTP testing tools when operating in an agentic or B2A pipeline context.

## Known failure modes

- Target URL is unreachable or returns a network error
- Target URL is not a valid HTTP/HTTPS endpoint
- Target service does not implement JSON-RPC, returning unrecognized response format
- Latency measurement times out if the target is slow to respond
- Missing or malformed x402 headers result in partial compliance report with warnings

## 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://domain-osint.agentdiet.dev/v1/preflight/certify)

## Output

Returns a structured compliance report covering JSON-RPC response validity, measured latency vs SLA thresholds, OpenAPI schema presence and correctness, and HTTP 402 / x402 v2 payment settlement header conformance for the submitted 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/domain-osint-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-efb317f1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from domain-osint.agentdiet.dev](https://www.zero.xyz/host/domain-osint.agentdiet.dev/llms.txt)