Plane

Implements the Model Context Protocol specification by initializing an MCP server instance, configuring stdio transport, and registering tools as callable endpoints. The server acts as a middleware layer that translates MCP protocol requests into Plane API calls, handling request routing, response serialization, and error propagation back to MCP clients. Uses a modular tool registry pattern where each tool is independently registered with the server during initialization.

Implements a request helper utility that handles authentication via API tokens, request formatting, and error handling for all Plane API calls. The helper abstracts away authentication details, allowing tools to make API calls with a consistent interface. Manages environment configuration for workspace slug, project slug, and API credentials, and provides centralized error handling that translates Plane API errors into MCP-compatible responses.

Implements MCP tool schema definition and argument validation, where each tool declares its input parameters with types, descriptions, and constraints. The MCP server validates incoming tool invocations against these schemas before passing arguments to tool handlers, ensuring type safety and providing clear error messages for invalid inputs. Schemas are automatically exposed to MCP clients for discovery and UI generation.

Implements centralized error handling that catches API errors, validation errors, and runtime exceptions, and formats them as MCP-compatible error responses. The error handler translates Plane API error codes and messages into human-readable error responses that MCP clients can display to users. Supports different error types (validation, authentication, not found, server error) with appropriate HTTP status codes and error messages.

Provides tools for creating, reading, updating, and deleting Plane projects, along with retrieving project metadata like members, settings, and configuration. Tools make API calls through the request helper to Plane's project endpoints, returning structured project data. Supports filtering and pagination for project listing operations, and validates project identifiers before making API calls.

Implements tools for creating, reading, updating, and deleting work items (issues) in Plane projects, with support for state transitions, priority assignment, and assignee management. Tools interact with Plane's issue endpoints through the request helper, handling issue lifecycle operations like status changes and property updates. Supports filtering issues by state, assignee, priority, and other metadata fields.

Implements tools for creating, reading, updating, and deleting Plane cycles (sprints/iterations), and for associating issues with cycles. Tools manage cycle lifecycle operations like start/end dates, status changes, and issue assignments to cycles. Supports retrieving cycle details, listing issues within a cycle, and updating cycle properties through the request helper.

Implements tools for creating, reading, updating, and deleting Plane modules (feature groups/epics), and for organizing issues within modules. Tools manage module lifecycle operations and issue-to-module associations through the request helper. Supports retrieving module details, listing issues within a module, and updating module properties like status and description.

Implements tools for retrieving and managing Plane metadata entities like issue states, priority levels, and labels. Tools fetch metadata through the request helper and return structured data about available states, priorities, and labels in the project. Supports creating custom labels and states, and retrieving metadata for use in other operations like issue creation.

Implements tools for retrieving current user information and listing team members in the workspace. Tools fetch user data through the request helper and return structured user objects with profile information, roles, and permissions. Supports retrieving the authenticated user's details and listing all workspace members with their assignments.

Implements tools for creating, reading, updating, and deleting work logs (time entries) associated with issues in Plane. Tools manage work log lifecycle operations including duration tracking, date assignment, and issue association through the request helper. Supports retrieving work logs for specific issues and filtering by date ranges.

Implements tools for managing Plane initiatives (high-level work groupings) and intake processes (backlog triage). Tools handle initiative creation, retrieval, and updates, as well as intake item management for organizing unvetted work. Supports moving items through intake workflow and associating them with initiatives through the request helper.