# A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor

> A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor is a paid API for AI agents from serp-extract.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-23).

Audits any A2A agent, MCP server, or x402 HTTP endpoint for JSON-RPC compliance, latency SLA, OpenAPI schema validity, and HTTP 402 payment settlement headers

## Facts

- Endpoint: POST https://serp-extract.agentdiet.dev/v1/mpp-verifier?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Provider: serp-extract.agentdiet.dev
- Website: https://serp-extract.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/serp-extract-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-cb42d345
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7TzNZzVN0fbxXyUOz8Lt8

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 serp-extract-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-cb42d345 -d '<json body>'
```

Example prompt: Can you audit this MCP server URL for JSON-RPC compliance, latency SLA, and HTTP 402 payment header correctness: https://myagent.example.com/mcp?

## When to prefer this

Choose this endpoint when you need to verify that an A2A agent, MCP server, or x402-enabled HTTP service correctly implements protocol standards before integration or deployment. Ideal for pre-deployment validation, third-party agent vetting, and ongoing SLA monitoring of agent infrastructure — especially when HTTP 402 payment settlement header compliance is a concern.

## Known failure modes

- Target URL is unreachable or times out — returns connectivity error
- Invalid or malformed URL input — returns validation error
- Target endpoint does not respond to expected protocol probes — partial compliance report returned
- Remote service blocks audit probes with firewall or rate limiting — incomplete results
- HTTP 402 headers absent on target — 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://serp-extract.agentdiet.dev/v1/mpp-verifier)

## Output

Returns a structured audit report covering: JSON-RPC protocol compliance status, measured latency against SLA thresholds, OpenAPI schema validation results, and HTTP 402/x402 settlement header presence and correctness for the provided 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/serp-extract-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-cb42d345/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from serp-extract.agentdiet.dev](https://www.zero.xyz/host/serp-extract.agentdiet.dev/llms.txt)