Rather than acting as another AI assistant, it provides a shared, searchable index that lets existing tools—including Claude, ChatGPT, Cursor, and custom agents—retrieve relevant information through an API, command-line interface, or Model Context Protocol (MCP). Its connectors include Google Drive, Slack, GitHub, and Google Calendar, with support for documents, messages, code, events, PDFs, and images. ctxd parses and indexes content, preserves source permissions, and syncs changes so agents can access current information with links back to the original sources.

Developers can search from the terminal, integrate retrieval into code, connect MCP-compatible agents, or automate workflows using composable actions defined in SKILLS. md. The service offers OAuth-based connections, per-user data isolation, encryption in transit and at rest, and on-premises deployment.

Its free offering includes all connectors and interfaces, with a stated allowance of 10 GB and 10,000 searches per month, without per-connector fees