# A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor

> A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor is a paid API for AI agents from workflows.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://workflows.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: workflows.agentdiet.dev
- Website: https://workflows.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/workflows-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-34450538
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5bb6E6uiPRSHS7fA4vONs

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 workflows-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-34450538
```

Example prompt: Run a compliance audit on https://myagent.example.com/mcp — I need to know if it's JSON-RPC compliant, what its latency SLA looks like, whether the OpenAPI schema is valid, and if the HTTP 402 payment headers are set up correctly.

## When to prefer this

Choose this endpoint when you need a single-call preflight or ongoing compliance check of an A2A, MCP, or x402 service before integrating it into an agent pipeline — especially when you need simultaneous verification of JSON-RPC correctness, latency SLA, OpenAPI schema, and HTTP 402 payment header validity rather than checking each concern separately.

## Known failure modes

- Target URL is unreachable or times out — audit returns connectivity error
- Target URL does not expose a valid JSON-RPC or MCP interface — compliance check fails with protocol mismatch
- Malformed or missing OpenAPI schema at the target — schema validation section reports error
- HTTP 402 headers absent or misconfigured — settlement header check fails with details
- Invalid or missing 'url' query parameter — returns 400 bad request

## 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://workflows.agentdiet.dev/v1/preflight/certify)

## Output

Returns a structured compliance report including JSON-RPC conformance status, measured latency against SLA thresholds, OpenAPI schema validation results, and HTTP 402 / x402 settlement header inspection 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/workflows-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-34450538/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from workflows.agentdiet.dev](https://www.zero.xyz/host/workflows.agentdiet.dev/llms.txt)