# A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor

> A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor is a paid API for AI agents from llms-generator.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://llms-generator.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: llms-generator.agentdiet.dev
- Website: https://llms-generator.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/llms-generator-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-c6603231
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8viS40mtDx05QKp5NEv1R

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 llms-generator-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-c6603231
```

Example prompt: Can you audit my MCP server at https://my-mcp-service.example.com for JSON-RPC compliance, latency SLA, and HTTP 402 payment header support?

## When to prefer this

Choose this endpoint when you need to programmatically audit an A2A agent, MCP server, or x402 paywall URL for multi-dimensional compliance — specifically JSON-RPC correctness, latency SLA, OpenAPI schema, and HTTP 402 settlement headers — in a single call. Prefer it over generic HTTP health-check tools when agent protocol compliance (MCP, A2A, x402/IETF MPP) is specifically required.

## Known failure modes

- Target URL is unreachable or returns a network error
- Target URL does not expose a valid endpoint (404/500)
- JSON-RPC or OpenAPI schema is entirely absent from the target
- HTTP 402 headers are missing or malformed on the target
- Target URL times out, causing incomplete SLA measurement
- Invalid or malformed URL provided as input

## 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://llms-generator.agentdiet.dev/v1/x402-mpp-paywall-verifier)

## Output

Returns a structured compliance report covering JSON-RPC protocol adherence, measured latency against SLA thresholds, OpenAPI schema presence and validity, and HTTP 402 / x402 payment header 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/llms-generator-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-c6603231/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from llms-generator.agentdiet.dev](https://www.zero.xyz/host/llms-generator.agentdiet.dev/llms.txt)