# 1MCP

A unified MCP runtime that aggregates multiple MCP servers behind one server process, with a CLI mode that lets agents discover and run tools progressively instead of loading every schema up front.

`1mcp serve` runs one aggregated runtime in front of many upstream MCP servers, addressing both configuration sprawl, where every client needs its own MCP wiring and filtering rules, and agent sprawl, where a session carries too many tools and schemas into context. Static servers load at startup, while template servers are created per client or per session.

CLI mode adds a thinner, agent-facing workflow with `instructions`, `inspect` and `run` commands, so an agent for Codex, Claude, Cursor or a similar tool-using client discovers tools progressively rather than seeing a broad tool surface up front. Presets, filters and instruction aggregation keep one runtime adaptable across different clients and projects.

It also offers a stdio proxy for broader compatibility and direct streamable HTTP for MCP-native clients. It installs with `npm install -g @1mcp/agent`, and is written in TypeScript.

Website: https://docs.1mcp.app