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ProofRail MCP Server Verifier
x402
ProofRail MCP Server Verifier is a paid API for AI agents from drkdm4jd-8767.uks1.devtunnels.ms, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-14).
Verifies an MCP server's compatibility and correctness before deployment by testing protocol negotiation, tools/list, schemas, transport, and auth, returning a PASS/FAIL/PARTIAL verdict with a deterministic evidence receipt.
Price / call$0.001
Success—
StatusUnknown
How this service works
Use ProofRail to verify an MCP server before deploying, upgrading, or trusting it. It provides MCP compatibility preflight, MCP verification, MCP server verification and validation, a compatibility test, and release preflight: protocol negotiation, tools/list, schemas, transport, auth classification, and an optional server-configured safe fixture; returns PASS, FAIL, or PARTIAL with a deterministic evidence receipt.
Output
Returns a PASS, FAIL, or PARTIAL verdict along with a deterministic evidence receipt that includes results for each checked dimension: protocol negotiation, tools/list enumeration, schema validation, transport classification, auth classification, and optionally a server-configured safe fixture test.
Example use cases
Pre-deployment MCP server audit
“Before I push this new MCP server to production, run a full ProofRail verification on it at https://staging.myagent.io/mcp and give me the PASS/FAIL verdict plus the evidence receipt so I can sign off on the deployment.”
Upgrade safety check for MCP server
“I'm about to upgrade my MCP server at https://tools.mycompany.com/mcp to a new version — can you run a ProofRail compatibility preflight first to make sure the protocol negotiation, tool schemas, and transport still check out?”
Third-party MCP server trust evaluation
“I want to integrate a third-party MCP server at https://vendor.example.com/mcp into our agent workflow — please run ProofRail on it and tell me if it gets a PASS, FAIL, or PARTIAL, and what the auth classification came out as.”
Technical details
Endpoint
POSThttps://drkdm4jd-8767.uks1.devtunnels.ms/mcp?utm_source=zero.xyzWhen to prefer
Choose ProofRail when you need a deterministic, structured verification of an MCP server's protocol compliance before a deployment, upgrade, or trust decision — especially when you need an auditable evidence receipt rather than just a manual inspection. Prefer it over ad-hoc testing scripts when you want a standardized PASS/FAIL/PARTIAL verdict that can be logged or used as a gate in a CI/CD pipeline.
Side effects
- Target MCP server is unreachable or times out — returns FAIL with connectivity error in evidence receipt
- MCP server returns malformed responses — returns FAIL or PARTIAL with schema mismatch details
- Auth classification cannot be determined — partial evidence receipt with auth field marked unknown
- Server does not support required protocol version — FAIL on protocol negotiation step
- Safe fixture not configured on server — fixture test skipped or marked N/A in receipt
Tags
x402
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