# A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor

> A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor is a paid API for AI agents from alpha-stream.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://alpha-stream.agentdiet.dev/v1/x402-verifier?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: alpha-stream.agentdiet.dev
- Website: https://alpha-stream.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/alpha-stream-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-388435dd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_r_8u2ZxjamTFTZg7gI0TA

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 alpha-stream-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-388435dd
```

Example prompt: Can you audit https://my-agent.example.com/mcp for JSON-RPC compliance, latency SLA, OpenAPI schema validity, and HTTP 402 x402 settlement header support?

## When to prefer this

Use this endpoint when you need to programmatically verify that a specific remote agent, MCP server, or x402-enabled API meets protocol compliance requirements across multiple dimensions simultaneously — JSON-RPC correctness, latency SLA, OpenAPI schema, and HTTP 402 headers — rather than testing each aspect manually or with separate tools. It is especially useful before onboarding a third-party agent endpoint into a multi-agent system or when validating your own monetized agent infrastructure against x402 and IETF MPP standards.

## Known failure modes

- Target URL is unreachable or returns a connection error
- Target URL does not respond within the auditor's timeout window, triggering SLA failure
- Malformed or missing URL parameter returns a 400-level error
- Target URL has no OpenAPI spec, resulting in schema check failure
- HTTP 402 headers absent or malformed on a claimed x402 endpoint
- Target blocks the auditor's probe requests (firewall or auth required)

## 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://alpha-stream.agentdiet.dev/v1/x402-verifier)

## Output

Returns a structured audit report indicating whether the target URL passes or fails JSON-RPC protocol compliance, latency SLA thresholds, OpenAPI schema validation, and HTTP 402 x402 settlement header checks, along with any specific failure details per compliance dimension.

## 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/alpha-stream-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-388435dd/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from alpha-stream.agentdiet.dev](https://www.zero.xyz/host/alpha-stream.agentdiet.dev/llms.txt)