# A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor

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

Audits any A2A agent, MCP server, or x402-capable URL for JSON-RPC compliance, latency SLA adherence, OpenAPI schema presence, and HTTP 402 payment settlement headers.

## Facts

- Endpoint: GET https://workflows.agentdiet.dev/v1/preflight?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: workflows.agentdiet.dev
- Website: https://workflows.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/workflows-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-23a09b07
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_WXXeLpd49F_tJ7_sRxg5t

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 workflows-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-23a09b07
```

Example prompt: Run a compliance preflight on https://myagent.example.com/mcp — I want to know if it passes JSON-RPC checks, what the latency SLA looks like, whether it has a valid OpenAPI schema, and if it has the right HTTP 402 x402 payment headers.

## When to prefer this

Choose this endpoint when you need a rapid, single-call compliance preflight on any A2A agent, MCP server, or x402-monetized URL before connecting it to an agent swarm or signing an SLA. It is specifically designed for agent-to-agent and machine-to-machine protocol validation (JSON-RPC, IETF MPP, x402 v2) rather than generic HTTP health checks or uptime monitors.

## Known failure modes

- Target URL is unreachable or times out — returns connectivity error
- Target URL does not respond to expected protocol probes — returns non-compliant status
- Invalid or missing URL parameter — returns 400 bad request
- Target service returns unexpected content type — schema check fails
- x402 headers absent or malformed — flagged as non-compliant in report

## 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://workflows.agentdiet.dev/v1/preflight)

## Output

Returns a structured compliance report covering JSON-RPC protocol validity, measured latency against SLA thresholds, OpenAPI schema detection, and HTTP 402 / x402 v2 settlement header presence and correctness for the target 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/workflows-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-23a09b07/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from workflows.agentdiet.dev](https://www.zero.xyz/host/workflows.agentdiet.dev/llms.txt)