"Handshake" matching MCP servers:

Autonomous synthetic health checks, JSON-RPC 2.0 handshake validation, breaking schema drift detection, and credential leak scanning for remote MCP servers.

A remote MCP server that gives MCP clients authenticated access to GitHub: repos, issues, pull requests, file contents, and search, over a proper OAuth 2.1 handshake. Runs on Cloudflare Workers.

Enables agents to search MCP servers ranked by measured handshake checks, tool lists, repository signals, and signed reports, with open data.

Enables pre-2026-07-28 MCP clients using the old initialize handshake to communicate with 2026-07-28 MCP servers by acting as a proxy, with no changes to either side.

Wraps a legacy MCP stdio server and presents it as a modern stateless 2026-07-28 protocol server, translating the legacy handshake and server-initiated requests.

Enables agents to validate email addresses through RFC 5321 syntax checks, MX record lookups, a 182,000-domain disposable blacklist, role-account detection, and an optional SMTP handshake. Runs locally via npx or as a hosted HTTP endpoint, returning explainable per-check scores at zero per-lookup API cost.

Enables agents to search, compare, and book hotels across roughly 3 million properties in 200+ countries, paying per booking in USDC on Base via the x402 payment handshake (with a CoinGate fallback) and then polling for order confirmation.

Launches any MCP server as a real client would, running the handshake, inspecting every tool's schema and description, and deliberately making a bad tool call to test error handling. Returns one deterministic, evidence-backed score with named issues so servers can be verified before users' agents hit them in production.