# MCP Endpoint Checker Test any MCP server URL. Robauto performs the initialize handshake, lists tools, and reports protocol version, transport and annotation problems. Canonical: https://robauto.ai/mcp-checker Paste an MCP server URL and Robauto runs the Streamable HTTP handshake against it: `initialize`, `tools/list`, protocol version negotiation and CORS/Accept-header checks. Results show every tool, its annotations, and whether the endpoint answers correctly for machine clients. Common failure: a static site returns `` for POST requests, so clients report "not valid JSON". A real MCP endpoint answers JSON-RPC on POST. [Create your own MCP server](/create-mcp) · [Robauto's MCP server](/mcp-server) · [Browse the MCP directory](/mcp-directory). --- (c) 2026 Robauto, Inc. — support@robauto.ai Machine surfaces: https://robauto.ai/llms.txt · https://robauto.ai/llms-full.txt · https://robauto.ai/.well-known/api-catalog