The Model Context Protocol (MCP) is an open standard that lets AI clients discover and invoke external tools in a consistent, secure way.

The problem MCP solves

Before MCP, every AI app reinvented its own plugin system. That meant fragmented integrations, inconsistent security models, and limited interoperability.

MCP standardizes the interface between an AI client and the tools it can call. Whether it’s searching the web, querying a database, or generating an image, the protocol stays the same.

Rainline + MCP

Rainline is built as a native MCP client. Out of the box, it can:

Auto-discover MCP servers on your local network
Mix and match tools from different providers
Run tool logic locally without sending your data to the cloud

Stay tuned for a deep dive into building your own MCP servers with rainfall-devkit.