kf-mcp-servers

Add MCP OAuth 2.0 (DCR + PKCE) to an existing HTTP MCP server so Claude Code, Claude Desktop, and other spec-compliant MCP clients can authenticate. Use when the client errors with "Cannot POST /register", "Invalid OAuth error response", "needs authentication", or when adding any new HTTP MCP server that needs per-user upstream credentials.

Build HTTP MCP servers using Express + @modelcontextprotocol/sdk Streamable HTTP transport. Covers tools, prompts, resources, auth, and OAuth patterns. Use when asked to build a new MCP server, add capabilities to an existing one, or wrap any API as MCP tools/resources/prompts.