# A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor

> A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor is a paid API for AI agents from serp-extract.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-23).

Audits any A2A agent, MCP, or x402 HTTP 402 URL for JSON-RPC compliance, latency SLA, OpenAPI schema validity, and payment settlement header correctness

## Facts

- Endpoint: POST https://serp-extract.agentdiet.dev/v1/preflight/certify?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Provider: serp-extract.agentdiet.dev
- Website: https://serp-extract.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/serp-extract-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-cabb1cc7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hw7d6w5u7bneSwecPHer5

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 serp-extract-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-cabb1cc7 -d '<json body>'
```

Example prompt: Can you run a full compliance audit on https://my-agent.example.com/mcp — check it for JSON-RPC compliance, latency SLA, OpenAPI schema validity, and HTTP 402 payment header correctness?

## When to prefer this

Use this endpoint when you need to verify that a remote A2A agent, MCP server, or x402-enabled HTTP endpoint is properly spec-compliant before integration, deployment, or payment routing — especially when you need a single call that covers JSON-RPC correctness, OpenAPI schema validity, latency SLA, and HTTP 402 payment header compliance simultaneously rather than running separate checks.

## Known failure modes

- Target URL is unreachable or returns non-2xx/402 — audit fails with connectivity error
- Target URL is not a valid agent/MCP endpoint — JSON-RPC compliance check fails with schema mismatch
- Extremely slow or timing-out target — latency SLA check records failure
- Malformed URL input — validation error on the required url field
- Target endpoint blocks probing requests — partial or empty compliance result returned

## 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://serp-extract.agentdiet.dev/v1/preflight/certify)

## Output

Returns a structured compliance report covering: JSON-RPC protocol conformance, measured latency against SLA thresholds, OpenAPI schema validity assessment, and HTTP 402 / x402 payment settlement header analysis — effectively a certification snapshot of the target endpoint's readiness.

## 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/serp-extract-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-cabb1cc7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from serp-extract.agentdiet.dev](https://www.zero.xyz/host/serp-extract.agentdiet.dev/llms.txt)