# 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-enabled URL for JSON-RPC compliance, latency SLA, OpenAPI schema validity, and HTTP 402 payment settlement headers

## Facts

- Endpoint: GET https://workflows.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: 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-076a6ced
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rA7RWfkn0Ks80GE0r0VP8

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-076a6ced
```

Example prompt: Can you audit https://myagent.example.com/rpc to check if it's JSON-RPC compliant, meets latency SLA, and returns the correct HTTP 402 x402 v2 settlement headers?

## When to prefer this

Choose this endpoint when you need to programmatically verify that a remote A2A agent, MCP server, or x402-enabled API meets protocol compliance standards including JSON-RPC correctness, latency SLAs, OpenAPI schema validity, and HTTP 402 payment header support. Prefer this over generic HTTP probe tools when your specific concern is agent-to-agent or MCP protocol compliance and x402/IETF MPP payment header correctness.

## Known failure modes

- Target URL is unreachable or returns a timeout — audit fails with connectivity error
- Target URL is not an A2A/MCP/x402 endpoint — returns non-compliance or unrecognized protocol
- Malformed URL input — returns validation error on the url parameter
- Target server blocks probe requests — partial audit results or access denied response
- x402 headers missing or malformed — flagged as non-compliant in settlement header section

## 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/mpp-verifier)

## Output

Returns a compliance report object covering JSON-RPC protocol adherence, measured latency vs. SLA thresholds, OpenAPI schema validation status, and HTTP 402/x402 v2 settlement header presence and 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/workflows-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-076a6ced/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)