# A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor

> A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor is a paid API for AI agents from shopify-spy.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).

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

## Facts

- Endpoint: GET https://shopify-spy.agentdiet.dev/v1/x402-mpp-paywall-verifier?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: shopify-spy.agentdiet.dev
- Website: https://shopify-spy.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/shopify-spy-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-44107b1b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_s1mMegOrTf6vQDlwYdt77

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 shopify-spy-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-44107b1b
```

Example prompt: Can you audit https://my-agent.example.com/api for JSON-RPC compliance, check its HTTP 402 payment headers, and tell me whether it meets latency SLA standards?

## When to prefer this

Use this endpoint when you need to programmatically verify that a remote agent, MCP server, or x402 micropayment endpoint correctly implements protocol standards — including JSON-RPC compliance, HTTP 402 settlement headers, and latency SLAs — rather than manually inspecting headers or writing custom probe logic.

## Known failure modes

- Target URL is unreachable or returns a network error — compliance check fails with connectivity error
- Target URL is not a valid A2A/MCP/x402 endpoint — report returns non-compliant with protocol mismatch details
- Missing or malformed 'url' query parameter — returns 400 bad request
- Target endpoint times out beyond SLA threshold — latency check marked as failed
- SSL/TLS errors on target URL — audit may return partial results or certificate 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://shopify-spy.agentdiet.dev/v1/x402-mpp-paywall-verifier)

## Output

Returns a structured compliance report including JSON-RPC spec conformance status, measured latency versus SLA thresholds, OpenAPI schema validity assessment, and HTTP 402 payment settlement header presence and correctness 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/shopify-spy-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-44107b1b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from shopify-spy.agentdiet.dev](https://www.zero.xyz/host/shopify-spy.agentdiet.dev/llms.txt)