Give agents your brain

Give full context to your agents.

Coding agents guess because they don't know what you know. Feed them your Constella library and Claude Code, Codex, and every assistant becomes actually useful — working from your real memories, not generic web pulls.

  • Give context to your agentsEvery note, paper & interview you've collected — instantly addressable.
  • Make them smart on your dataGrounded answers from your sources, not generic web pulls.
  • Stop feeding them data every timeNo more pasting docs into chats — connect once, ask forever.

Connect Constella in a minute.

Constella exposes your library as an MCP server. Point any compatible agent at the endpoint with your personal key and it can search, recall, and reason over everything you've saved.

Endpointhttps://fastfind.app/mcp
Auth headerAuthorization: Bearer YOUR_CONSTELLA_API_KEY

Find your personal API key in the Constella desktop app — open the “Upgrade Your Assistant” card at the bottom of the dashboard sidebar, or Settings. Replace YOUR_CONSTELLA_API_KEY in the snippets below with it. Get the desktop app →

  1. Open Terminal.
  2. Install if needed:
    npm install -g @anthropic-ai/claude-code
  3. Paste this — swap in your key:
    claude mcp add --transport http --scope local \ constella https://fastfind.app/mcp \ --header "Authorization: Bearer YOUR_CONSTELLA_API_KEY"
  4. Start Claude Code:
    claude
  5. Type /mcp — you should see constella ✓ connected.
  6. Test: “Use Constella to find my notes on X.”
  7. Plan requirement: any Claude Code user.

Your library, in every agent.

Build your second brain in Constella, then connect it once. Your agents stop guessing and start working from what you actually know.

Get Constella free