{"id":"giantswarm-mcp-debug","name":"mcp-debug","af_score":46.2,"security_score":57.5,"reliability_score":36.2,"what_it_does":"mcp-debug is a Go command-line tool for debugging Model Context Protocol (MCP) servers. It can connect to MCP servers (including via streamable-http), provide an interactive REPL to inspect tools/resources/prompts, log JSON-RPC traffic verbosely, and run in an MCP server mode itself. It also supports OAuth 2.1 authentication flow options (including PKCE, discovery, resource indicators, and optional CIMD/DRC) to access protected MCP endpoints.","best_when":"You’re developing against MCP servers and need to introspect capabilities, test tool calls/notifications, and verify OAuth/OIDC authorization behaviors quickly.","avoid_when":"You need a stable, long-lived API surface for other services to call; or you must run in environments with strict constraints on interactive browser-based auth and verbose logging of protocol messages.","last_evaluated":"2026-03-30T15:26:57.411441+00:00","has_mcp":true,"has_api":false,"auth_methods":["OAuth 2.1 (with PKCE) via interactive browser flow"],"has_free_tier":false,"known_gotchas":["This is primarily a CLI/debugger; agent automation may require driving interactive REPL/browser-based OAuth.","Verbose JSON-RPC logging could expose sensitive information in logs if misconfigured.","No evidence (from README alone) of structured machine-readable error formats for agents; failures may be CLI-output driven."],"error_quality":0.0}