How to teach Claude Duet your knowledge

Start with Claude memory

Claude memory is on by default for Free, Pro, Max, and Ultra plans on web, Desktop, and Mobile. Tell Claude to “remember this” to save a fact, or let it save useful details during a conversation. Claude memory

Memory can cover your role, projects, working style, communication preferences, and ongoing work. Review, edit, or delete memory topics in Settings, or ask Claude in chat to change or forget something. Claude memory

Resetting memory permanently deletes all memories, including project memories. Claude memory

Use past chats for earlier context

Claude Duet can search past chats to bring relevant context into a new conversation. This uses the same “Search and reference chats” setting as Claude, which you can turn off in Settings > Your Claude. Claude Duet

Claude Duet uses and adds to Claude memory, so knowledge Claude already has about you is available in Duet. Claude memory and chat search

Connect apps Claude Duet can use

Duet can use apps already connected in Claude, including Gmail, Google Calendar, Google Drive, Slack, QuickBooks, HubSpot, Docusign, and Calendly. You start each connection yourself. Disconnecting an app stops future access but retains memory of earlier conversations. Claude Duet

Some connectors have limits in Duet. Slack works with limits, Microsoft 365 is not available yet, and Personal Finance is unavailable. Duet checks accounts at intervals, so urgent items can arrive between checks. Claude Duet

Know the limits of Claude Duet

Claude Duet is a research preview for Pro, Max, and Ultra users in the US through a waitlist. It is not available on Team or Enterprise plans. Duet runs on Claude Opus 5.5, and users cannot choose the model. Claude Duet

Duet cannot see all projects or computer files. It can read your work in Claude but cannot change it. It asks before sending a message, making a payment, signing a document, or deleting anything. Claude Duet

Add custom remote MCP connectors

Anthropic documents custom connectors using remote MCP for connecting Claude to external tools and data sources. For an individual Pro or Max plan, the documented setup is Customize > Connectors > Add custom connector, then enter a name and remote MCP server URL, choose authentication, and add the connector. Custom connectors

A custom connector's server must be reachable over the public internet from Anthropic's IP ranges. Claude connects from Anthropic's cloud infrastructure, not from your device. Local MCP servers configured in Claude Desktop are a separate mechanism and are unavailable in Cowork or claude.ai. Custom connectors

Authentication options are Sign in now, Sign in when needed, or No sign in. Fixed credentials such as API keys or bearer tokens can be sent through request headers. Custom connectors can read, create, modify, delete data, or take actions, so connect only to servers you trust and review requested permissions. Custom connectors

Where KnowMan fits

KnowMan saves articles and links, reads and tags them, answers questions with citations, and keeps memories such as claims, decisions, and playbooks. Its MCP server runs locally with npx -y @knowman/mcp or as a hosted server at https://api.knowman.io/mcp with OAuth sign-in or an API key. Custom connectors

You can use KnowMan's MCP with documented local clients such as Claude Desktop, or read the KnowMan MCP setup guide and the Claude knowledge base guide. KnowMan has a Chrome extension and imports from Pocket, Instapaper, Omnivore, Readwise, Wallabag, and a browser bookmarks file.

Use the hosted KnowMan server

For a client that supports remote MCP servers, add https://api.knowman.io/mcp. Open the KnowMan consent page to sign in with OAuth and approve access, or create an API key in KnowMan settings and send it as an Authorization: Bearer <key> header.

For Cursor, add this to mcp.json: {"mcpServers":{"knowman":{"url":"https://api.knowman.io/mcp","headers":{"Authorization":"Bearer <key>"}}}}. Then ask the assistant to search your KnowMan or save a URL. KnowMan's open-source client is available at https://github.com/Essatt/knowman-mcp.