# 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 any A2A agent, MCP server, or x402 HTTP 402 URL for JSON-RPC compliance, latency SLA, OpenAPI schema validity, and payment settlement headers

## Facts

- Endpoint: GET https://workflows.agentdiet.dev/v1/usdc-quote-audit?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-e44a1bad
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ymZbbfxx5L4MEuKD6tR0L

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-e44a1bad
```

Example prompt: Can you audit https://myagent.example.com/mcp for JSON-RPC compliance, latency SLA, 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 service actually conforms to protocol specifications — including JSON-RPC correctness, HTTP 402 payment headers (x402 v2), IETF MPP compliance, OpenAPI schema, and latency SLA. Prefer this over generic HTTP health checkers when the target is specifically an agent or payment-aware endpoint that needs multi-layer protocol validation.

## Known failure modes

- Target URL unreachable or returns connection timeout
- Target URL is not an A2A/MCP/x402 endpoint and cannot be meaningfully audited
- Invalid or malformed URL input returns validation error
- Target service blocks automated probing or returns 403/429
- Partial audit results if endpoint only partially implements the protocol

## 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/usdc-quote-audit)

## Output

Returns a structured compliance report covering JSON-RPC protocol adherence, measured latency against SLA thresholds, OpenAPI schema validity, and HTTP 402 / x402 v2 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-e44a1bad/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)