Plane MCP Server is an MCP server that lets LLMs interact with Plane.so by routing requests through Plane's API to manage projects and issues. It exposes a compact set of tools that enable listing all projects in a workspace, retrieving detailed project information, creating issues with customizable properties (name, HTML description, priority, state, and assignees), listing and filtering issues across projects, fetching issue details, and updating existing issues. The server supports multiple client configurations (including Claude and other Smithery-supported clients) via a local node process and environment variables. Prerequisites include Node.js 22.x or higher, a Plane API key, and a Plane workspace slug. Installation can be done quickly via Smithery, which configures the MCP server for specific clients, or manually by cloning the repository, installing dependencies, and building. The MCP endpoints use hyphenated tool names such as list-projects, get-project, create-issue, list-issues, get-issue, and update-issue, with parameters described in the README. Configuration in Claude for Desktop demonstrates how to wire the server, including setting PLANE_API_KEY and PLANE_WORKSPACE_SLUG. Security considerations emphasize explicit user approvals for changes and safeguarding API keys.