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3ngram connects to AI tools via the Model Context Protocol (MCP). Each client connects to the same workspace, so memories saved in one tool show up in all others.

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Claude Desktop and Claude.ai

Claude Desktop and Claude.ai support MCP connectors natively.
  1. Open Settings > Integrations > MCP Servers
  2. Click Add MCP Server
  3. Fill in:
    • Name: 3ngram
    • Endpoint URL: https://mcp.3ngram.ai/mcp
  4. Complete the OAuth authorization when prompted
Once connected, Claude discovers all memory tools and prompt templates automatically.

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Claude Code CLI

Claude Code connects via Streamable HTTP. 
claude mcp add 3ngram --transport http https://mcp.3ngram.ai/mcp
Then authenticate: 
/mcp
Select 3ngram and complete the OAuth flow in your browser. For session hooks (briefings, auto-capture), see Claude Code Hooks.

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Cursor

Cursor supports MCP servers in settings.
  1. Open Settings > MCP
  2. Add a new server:
    • Name: 3ngram
    • URL: https://mcp.3ngram.ai/mcp
  3. Authorize when prompted

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ChatGPT

ChatGPT supports remote MCP servers via apps.
  1. Open Settings > Apps
  2. Click Advanced settings (Create app)
  3. Fill in:
    • Name: 3ngram
    • MCP Server URL: https://mcp.3ngram.ai/mcp
    • Authentication: OAuth
  4. Click I understand and want to continue
  5. Complete the OAuth authorization when prompted
This manual setup is temporary. We are working to get 3ngram listed in ChatGPT’s app directory for one-click install. We will notify all users once it is available.
ChatGPT doesn’t expose MCP prompt templates natively. Add this to your custom instructions (Settings > Personalization > Custom instructions) for briefing and debrief support: 
When I say "run my briefing", use the 3ngram MCP tools in this order:
1. commitments(include_deferred=True)
2. blockers()
3. overdue()
4. stale_commitments(days=7)
5. recall(topic="recent decisions", sort_by="recent", limit=5)

Present as a structured briefing with sections for Overdue, Blockers,
Open Commitments, Stale items, and Recent Decisions.

When I say "run my debrief", scan the conversation for decisions,
commitments, blockers, and learnings. Persist each with remember(),
resolve completed commitments, and summarize what was captured.

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Platform feature support

FeatureClaude DesktopClaude CodeCursorChatGPT
MCP toolsYesYesYesYes
Prompt templatesYesYesYesVia custom instructions
Auto-capture hooksNoYes (hooks)NoNo
Session briefingsNoYes (hooks)NoNo
OAuth loginYesYesYesYes
Auto-capture hooks and session briefings require Claude Code Hooks setup.