Changelog

Releases are published to npm as mcp-switchboard, with notes on GitHub.

v0.1.0 · 2026-11-14Copy Anchor Link

The first release.

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• Monorepo scaffold: pnpm workspaces, Turborepo, Biome, Vitest and TypeScript.
• A daemon that aggregates stdio, Streamable HTTP and SSE MCP servers and serves one MCP endpoint per profile at /p/<profile>/mcp.
• Profiles built from servers, include and exclude tool patterns, and per-tool name and description overrides.
• Profile selection by URL path, the X-Switchboard-Profile header, client rules on the MCP client name, or a default profile.
• One shared process per upstream server, started on first use and stopped when idle, with retries and backoff.
• A persisted tool catalog, so tools/list answers without starting servers.
• Live tools/list_changed notifications when a profile or an upstream server's tools change.
• config.json is reloaded when edited by hand; invalid edits are reported and ignored.
• An audit log of tool calls, without arguments or results.
• Loopback-only binding with Host and Origin checks.
• The meta tool surface: search_tools, get_schema and call_tool replace a profile's tools with three, whatever its size.
• Offline BM25 tool search that understands camelCase and snake_case names.
• Tool schemas rendered as TypeScript signatures for models.
• The auto surface, which switches from passthrough to meta above autoThreshold tools.
• The code tool surface: one execute tool runs model-written JavaScript that calls the profile's tools as typed methods, such as await github.create_issue({...}).
• A QuickJS WebAssembly sandbox for code mode with no access to Node, the network or the file system, and per-profile budgets for time, memory, tool calls, code size and output size.
• catalog.search() and catalog.describe() inside the sandbox for profiles too large to describe up front.
• An admin API and a web UI to manage servers, profiles, client connections, secrets and live activity.
• One-click connection of Cursor, Claude Code, Claude Desktop, VS Code, Windsurf, Codex and Gemini CLI, editing their configuration files in place with a backup.
• Import of the MCP servers already configured in those clients.
• Secrets referenced as secret://name, stored in the OS keychain when available.
• OAuth sign-in for remote MCP servers, with tokens kept in the secret store.
• The switchboard CLI: up, stop, status, doctor, import, server, profile, default, rule, client, secret and the connect stdio bridge.