# 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 a remote A2A, 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/preflight?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-9e5dea04
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gXus_7jzsdwmAXZ5VnNjd

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-9e5dea04
```

Example prompt: Can you audit https://myagent.example.com/api for JSON-RPC compliance, latency SLA, and HTTP 402 payment header support?

## When to prefer this

Use this endpoint when you need a structured, automated compliance report for any A2A, MCP, or x402-enabled service URL — particularly when validating JSON-RPC adherence, HTTP 402 payment headers, OpenAPI schema correctness, and latency SLA in a single call before deploying or integrating with an agent endpoint.

## Known failure modes

- Target URL is unreachable or returns a non-2xx response
- Target endpoint does not expose a recognizable A2A, MCP, or x402 interface
- Latency measurement times out before SLA check completes
- Malformed or missing URL parameter returns a 400 validation error
- Target URL uses a private/internal network address that cannot be probed

## 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/preflight)

## Output

Returns a structured compliance report covering JSON-RPC protocol adherence, measured latency versus SLA thresholds, OpenAPI schema validation results, 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-9e5dea04/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)