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

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Claude Desktop

Claude Desktop supports MCP natively via Streamable HTTP.
  1. Open Settings in Claude Desktop
  2. Go to the MCP Servers section
  3. Add a new server with this config:
{
  "mcpServers": {
    "3ngram": {
      "url": "https://mcp.3ngram.ai/mcp"
    }
  }
}
  1. Save and restart Claude Desktop
  2. On first use, Claude will prompt you to authorize via OAuth
Once connected, Claude discovers all 16 memory tools and 3 prompt templates automatically.

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Claude Code CLI

Claude Code can connect via Streamable HTTP (remote) or stdio (local).

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Remote (hosted)

claude mcp add 3ngram --transport http https://mcp.3ngram.ai/mcp

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Local (self-hosted)

If you’re running 3ngram locally: 
claude mcp add 3ngram -- python -m engram.mcp.server
Make sure DATABASE_URL and OPENAI_API_KEY are set in your environment.

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Cursor

Cursor supports MCP servers via the @ mention system.
  1. Open Settings > MCP
  2. Add a new server:
    • Name: 3ngram
    • URL: https://mcp.3ngram.ai/mcp
  3. Authorize when prompted
Use @3ngram in chat to access memory tools:
“@3ngram run my briefing”

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ChatGPT

ChatGPT supports MCP connections. Add 3ngram as an MCP server in ChatGPT’s settings. For prompt templates (briefing, debrief, project context), ChatGPT doesn’t expose the MCP prompts/list protocol natively. Add this to your custom instructions (Settings > Personalization > Custom instructions): 
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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Self-hosted connections

If you’re self-hosting 3ngram, point your clients to your local MCP server instead: 
{
  "mcpServers": {
    "3ngram": {
      "url": "http://localhost:8001/mcp",
      "headers": {
        "Authorization": "Bearer YOUR_MCP_AUTH_TOKEN"
      }
    }
  }
}
Replace YOUR_MCP_AUTH_TOKEN with the token from your .env file.

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Platform feature support

FeatureClaude DesktopClaude CodeCursorChatGPT
Memory tools (16)YesYesYesYes
Prompt templatesYesYesYesVia custom instructions
Auto-capture hooksNoYesNoNo
OAuth loginYesYesYesYes
Auto-capture hooks are CLI-only because they depend on Claude Code’s hook system. See Memory Tools for details.