# 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 2026-10-21).

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://serp-extract.agentdiet.dev/v1/402-compliance?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- 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-915c8fce
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_U8vqxofvHS94oSC563Fbr

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-915c8fce
```

Example prompt: Can you audit https://myagent.example.com/mcp for JSON-RPC compliance, latency SLA, and HTTP 402 payment header setup — I want to know if it meets x402 v2 and MCP standards before I ship it?

## When to prefer this

Use this endpoint when you need to programmatically audit an A2A agent, MCP server, or x402 payment-gated API for multi-dimensional protocol compliance — including JSON-RPC, SLA latency, OpenAPI schema, and HTTP 402 headers — in a single call. Prefer this over manual testing or generic HTTP checkers when you need structured compliance results against specific AI agent and payment protocol standards (x402 v2, IETF MPP, MCP).

## Known failure modes

- Target URL is unreachable or returns a network error — compliance check cannot complete
- Target URL does not respond to JSON-RPC probes — JSON-RPC compliance fails
- Target URL lacks HTTP 402 headers — x402 compliance marked as failing
- Target URL returns malformed OpenAPI schema — schema validation fails
- Invalid or missing `url` parameter — request rejected with validation error

## 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/v1/402-compliance)

## Output

Returns a structured compliance report covering JSON-RPC protocol conformance, measured latency against SLA thresholds, OpenAPI schema validity, and presence/correctness of HTTP 402 payment settlement headers 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"
  },
  "limit": {
   "type": "integer",
   "default": 20,
   "maximum": 100,
   "minimum": 1,
   "description": "Maximum number of items to return per page (1-100)"
  },
  "cursor": {
   "type": "string",
   "description": "Opaque pagination cursor for fetching the next page"
  }
 }
}
```

## 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-915c8fce/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)