# A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor

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

Audits a given 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://json-repair.agentdiet.dev/v1/x402-mpp-paywall-verifier?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: json-repair.agentdiet.dev
- Website: https://json-repair.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/json-repair-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-8532b5bb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_OW413vEqF3ELUmid2oc9f

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 json-repair-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-8532b5bb
```

Example prompt: Can you audit this MCP endpoint for JSON-RPC compliance, latency SLA, and HTTP 402 payment header support: https://api.mytool.dev/mcp?

## When to prefer this

Choose this endpoint when you need to programmatically verify that an A2A, MCP, or x402 endpoint conforms to protocol standards before integrating it into an agent pipeline, or when debugging compliance issues with payment paywalls or JSON-RPC agent APIs. It is specifically suited for x402/HTTP 402 header validation alongside standard SLA and schema checks, making it more specialized than generic API health-check tools.

## Known failure modes

- Target URL is unreachable or returns a non-2xx/402 response — audit may fail or return partial results
- Invalid or missing URL parameter — returns validation error
- Target endpoint has no OpenAPI spec exposed — schema section of report may be empty or indicate absence
- Very slow or timing-out endpoints may cause the audit to fail with a latency-related error
- Non-agent URLs (e.g. plain HTML pages) may return low compliance scores with no meaningful JSON-RPC findings

## 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://json-repair.agentdiet.dev/v1/x402-mpp-paywall-verifier)

## Output

Returns a structured compliance report covering JSON-RPC conformance status, measured latency vs SLA thresholds, OpenAPI schema validation findings, and analysis of HTTP 402 / x402 payment settlement headers 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/json-repair-agentdiet-dev-a2a-mcp-http-402-endpoint-sla-compliance-8532b5bb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from json-repair.agentdiet.dev](https://www.zero.xyz/host/json-repair.agentdiet.dev/llms.txt)