# A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor

> A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor is a paid API for AI agents from whale-momentum.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://whale-momentum.agentdiet.dev/v1/preflight/certify?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: whale-momentum.agentdiet.dev
- Website: https://whale-momentum.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/whale-momentum-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-fef2235e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xogtZK3bFHTXYCntvMPbJ

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 whale-momentum-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-fef2235e
```

Example prompt: Can you run a compliance audit on https://my-agent-service.example.com/mcp — I need to know if it passes JSON-RPC validation, meets latency SLA, has a valid OpenAPI schema, and correctly returns HTTP 402 payment headers?

## When to prefer this

Use this endpoint when you need a single-call compliance certification of an A2A, MCP, or x402 HTTP 402-capable URL covering JSON-RPC, latency SLA, OpenAPI schema, and payment header checks simultaneously — especially before deploying or integrating a new agent endpoint. Prefer this over manual testing or generic HTTP health checks when you need structured, protocol-specific audit results for agent-to-agent or model-context-protocol services.

## Known failure modes

- Target URL is unreachable or times out — audit fails with connectivity error
- URL is missing or malformed — returns validation error on the url parameter
- Target server returns unexpected HTTP status codes unrelated to compliance — partial audit result
- Latency measurement may be affected by transient network conditions — SLA result could vary between calls
- Target endpoint blocks automated probes — incomplete audit data 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://whale-momentum.agentdiet.dev/v1/preflight/certify)

## Output

Returns a structured compliance report indicating pass/fail status for JSON-RPC protocol conformance, observed latency vs SLA thresholds, OpenAPI schema validity, and HTTP 402 / x402 settlement header correctness for the submitted 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/whale-momentum-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-fef2235e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from whale-momentum.agentdiet.dev](https://www.zero.xyz/host/whale-momentum.agentdiet.dev/llms.txt)