mcp-spec-check - Black-box readiness validator for MCP 2026-07-28 servers

Show HN: Only 1 of 4,356 reachable MCP servers is ready for the 2026-07-28 spec

mcp-spec-check is a powerful command-line tool that instantly verifies if your remote Model Context Protocol (MCP) server is ready for the upcoming 2026-07-28 specification release. Using pure black-box HTTP probes, it assesses critical requirements like the new stateless core, routing headers, and session independence without needing code access. This tool helps developers avoid future compatibility issues by providing a clear readiness verdict in seconds, complete with migration links. Whether you are maintaining a public registry server or a private endpoint, mcp-spec-check ensures your infrastructure stays ahead of the curve as the ecosystem transitions to the latest protocol standards.

"Is your remote MCP server ready for the 2026-07-28 MCP spec release? Find out in 30 seconds."