MCP Composer

MCP Composer is a gateway service that centralizes the management of multiple MCP servers. Instead of running separate MCP instances for each AI agent or tool, developers can register all desired downstream servers in a single configuration file and let Composer orchestrate connections on demand. This solves the common pain point of juggling numerous service ports, credentials, and tool selections when scaling AI workflows across teams or environments.

At its core, Composer exposes a single Server‑Sent Events (SSE) endpoint that aggregates the capabilities of all configured downstream MCP servers. Each SSE interface can be created or removed dynamically, allowing an AI agent to request a tailored mix of tools and prompts without exposing the underlying complexity. The gateway transparently activates or deactivates services, manages authentication tokens, and routes requests to the appropriate downstream server based on a lightweight “Server Kit” configuration. For developers, this means they can focus on building higher‑level logic—such as orchestrating multi‑step agents or integrating with workflow engines like n8n—while Composer handles the plumbing.

Key capabilities include dynamic MCP server management, independent interface configuration, and a unified SSE API. Developers can spin up separate endpoints for different use cases (e.g., one for a data‑analysis agent, another for a conversational bot) and specify exactly which downstream tools should be available on each. The architecture supports plug‑and‑play of new MCP servers; adding a new server only requires updating the JSON config, and Composer automatically incorporates it into its routing logic. This flexibility is especially valuable in environments where new data sources or specialized models are frequently added.

Typical use cases span from enterprise AI orchestration—where a single gateway serves multiple departments with distinct tool sets—to research prototyping, where developers experiment with different model combinations without redeploying services. Integration is straightforward: any MCP‑compatible client (such as Claude, Cursor, or custom agents) can point to the Composer’s SSE endpoint, receiving a unified stream of tool invocations and responses. The result is a cleaner deployment topology, reduced network surface area, and easier maintenance of credentials and access controls.

What sets MCP Composer apart is its dynamic endpoint creation coupled with a robust internal controller that manages downstream connections. Unlike static MCP servers, Composer can reconfigure tool availability on the fly and expose isolated interfaces per consumer. This not only improves security—each agent sees only its authorized tools—but also enhances scalability, as new agents can be added without restarting the gateway. For developers building complex AI ecosystems, MCP Composer offers a single source of truth for all tool access, streamlining both development and operational workflows.