# 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 A2A agent, MCP server, or x402 payment endpoint for JSON-RPC compliance, latency SLA, OpenAPI schema validity, and HTTP 402 settlement header correctness.

## Facts

- Endpoint: GET https://whale-momentum.agentdiet.dev/v1/mpp-verifier?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-6a2fb369
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wf-MQcVk9duHcftqYC7l_

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-6a2fb369
```

Example prompt: Can you audit https://my-agent.example.com/mcp for JSON-RPC compliance, latency SLA, and HTTP 402 settlement headers and tell me if anything is misconfigured?

## When to prefer this

Use this endpoint when you need to verify that a specific remote A2A agent, MCP server, or HTTP 402-enabled service meets protocol standards (JSON-RPC 2.0, OpenAPI, x402/MPP) and latency SLAs before integrating it into an agent workflow. Prefer it over generic HTTP health-checkers when you need protocol-specific compliance feedback including payment header validation.

## Known failure modes

- Target URL is unreachable or times out — returns error indicating connection failure
- Target URL returns unexpected HTTP status codes incompatible with auditing
- Malformed or missing URL parameter — returns validation error
- Target endpoint lacks any recognizable A2A/MCP/x402 structure — report may be incomplete or inconclusive
- Rate limiting or access restrictions on the target URL prevent full audit

## 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/mpp-verifier)

## Output

Returns a compliance report object covering JSON-RPC 2.0 conformance, observed latency vs. SLA thresholds, OpenAPI schema validity findings, and HTTP 402/x402 settlement header correctness for the audited 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-6a2fb369/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)