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Deep Protocol & Security Audit for A2A/MCP/x402 Endpoints
x402
Deep Protocol & Security Audit for A2A/MCP/x402 Endpoints is a paid API for AI agents from assay.agentdiet.dev, paid per call via MPP or x402, $0.005/call, status unknown (last checked 2026-10-21).
Performs a cryptographic pre-flight security audit, schema conformance check, and TDQS reputation verification on a given A2A, MCP, or x402 endpoint, returning a grade and score.
Price / call$0.005
Success—
StatusUnknown
How this service works
Live A2A & MCP endpoint security auditor, Tool Definition Quality Score (TDQS) certifier, prompt-injection scanner, and cryptographic trust oracle.
Output
Returns a JSON object containing the audit status (e.g. pass/fail), a letter-style security grade (e.g. A, B, C), a numeric score (integer), and the target URL that was audited. This gives a concise, actionable security posture summary for the queried endpoint.
Example use cases
Pre-flight check before agent integration
“Before I connect my agent fleet to this new MCP server at https://mcp.example.ai, can you audit it for security and protocol compliance and give me its grade?”
Vetting an x402 payment endpoint
“I'm about to wire payments through https://pay.someservice.dev — can you do a cryptographic security audit on that x402 endpoint and tell me if it's safe and what score it gets?”
Ongoing reputation check for third-party A2A service
“Can you audit https://partner-a2a.acme.com and tell me its current TDQS reputation score and security grade? I need to confirm it's still compliant before our next deployment.”
Technical details
Endpoint
GEThttps://assay.agentdiet.dev/v1/audit?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, automated security and protocol compliance check on any A2A, MCP, or x402 endpoint before connecting to it, integrating it into an agent workflow, or routing payments through it. It is especially valuable for pre-flight vetting of unfamiliar third-party agent services, payment processors, or MCP servers where cryptographic conformance and TDQS reputation matter. Prefer it over manual inspection or generic HTTP health checks when you need a structured grade and score rather than raw connectivity data.
Side effects
- Target URL is unreachable or returns no response — audit may fail or return a low score
- Target is not an A2A/MCP/x402 endpoint — may result in conformance errors or invalid grade
- Malformed or missing target parameter — request rejected with validation error
- Rate limiting or payment failure — endpoint returns 402 or throttle error
- Target endpoint actively blocks external probing — incomplete audit results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"dossier": {
"grade": "A",
"score": 95,
"target": "https://example.com"
},
"receipt": "asr_rcpt_sample",
"verdict": "allow"
}
}Tags
x402
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