# 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 a remote agent, MCP, or x402 URL for JSON-RPC compliance, latency SLA, OpenAPI schema validity, and HTTP 402 payment settlement headers

## Facts

- Endpoint: GET https://domain-osint.agentdiet.dev/v1/mpp-verifier?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-c4e34ce0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Dj5hduuv5IgqZ8V6sNlq4

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-c4e34ce0
```

Example prompt: Can you audit https://my-agent.example.com/mcp for JSON-RPC compliance, check its latency SLA, and confirm whether it returns proper HTTP 402 payment headers?

## When to prefer this

Use this endpoint when you need to programmatically verify whether a remote agent, MCP server, or x402-gated service meets protocol compliance standards — especially for JSON-RPC, IETF MPP, OpenAPI schema validity, and HTTP 402 payment header correctness. Prefer this over generic HTTP health-check tools when the focus is specifically on A2A/MCP/x402 protocol adherence rather than simple uptime.

## Known failure modes

- Target URL is unreachable or returns a connection timeout
- Target URL does not implement JSON-RPC and all compliance checks fail
- Malformed or missing URL parameter returns a 400 validation error
- Target endpoint returns unexpected content-type causing schema parse failure
- HTTP 402 headers absent on target causing payment header check to fail

## 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/mpp-verifier)

## Output

Returns a structured report indicating whether the target URL passes JSON-RPC compliance checks, meets latency SLA thresholds, has a valid OpenAPI schema, and includes correct HTTP 402 settlement headers, along with specific pass/fail statuses per check.

## 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-c4e34ce0/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)