# A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor

> A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor is a paid API for AI agents from x402broker.com, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).

Audits any 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://x402broker.com/v1/402-compliance?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: x402broker.com
- Website: https://x402broker.com
- Canonical page: https://www.zero.xyz/c/x402broker-com-a2a-mcp-http-402-endpoint-sla-compliance-auditor-730d3eff
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tCgRfOO3ekhkrS2HkYreJ

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 x402broker-com-a2a-mcp-http-402-endpoint-sla-compliance-auditor-730d3eff
```

Example prompt: Can you audit https://myagent.example.com/api/mcp to check whether it's properly JSON-RPC compliant, meets latency SLA requirements, and has valid HTTP 402 settlement headers?

## When to prefer this

Choose this endpoint when you need to programmatically verify that a remote A2A, MCP, or x402-enabled service is correctly implementing protocol standards — especially JSON-RPC compliance, HTTP 402 payment settlement headers, latency SLA, and OpenAPI schema correctness — rather than manually inspecting headers or running ad-hoc curl tests.

## Known failure modes

- Target URL is unreachable or returns a network timeout — audit fails with connectivity error
- Target URL returns non-standard response format incompatible with any audited protocol — partial or null compliance results
- Invalid or malformed URL supplied — returns validation error before audit begins
- Target service blocks automated probing (e.g. rate limits, firewall) — incomplete audit results
- Target endpoint has no HTTP 402 headers — compliance check returns non-compliant status for payment headers

## 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://x402broker.com/v1/402-compliance)

## Output

Returns a structured compliance report covering: JSON-RPC protocol conformance, observed latency vs SLA thresholds, OpenAPI schema validity findings, and HTTP 402 payment settlement header presence and correctness for the audited endpoint 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/x402broker-com-a2a-mcp-http-402-endpoint-sla-compliance-auditor-730d3eff/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402broker.com](https://www.zero.xyz/host/x402broker.com/llms.txt)