# 3ngram

> AI memory and follow-through for Claude, ChatGPT, and Cursor.

3ngram is an MCP server that gives AI tools structured memory, proactive follow-through, and reusable agent workflows. It is the only tool that combines structured memory (decisions, commitments, blockers, preferences, patterns), reusable prompt workflows, and document indexing in a single MCP server.

## What it does

- **Structured memory**: Memories are classified into types (decisions, commitments, blockers, preferences, patterns, context), each with its own lifecycle. Commitments have due dates, blockers get surfaced, decisions are retrievable with rationale.
- **Proactive follow-through**: Tracks overdue commitments, stale items, and unresolved blockers. Sends daily digests and alerts. Your AI tells you what needs attention before you ask.
- **Reusable agent workflows**: Store parameterized prompts that execute as multi-step AI workflows inside any MCP client. Run competitive research, weekly reviews, or project status checks from chat.
- **Document indexing**: Index GitHub repos, markdown files, and other sources. Search them with natural language alongside your memories.
- **Cross-platform**: Works in Claude Desktop, Claude Code, ChatGPT, Cursor, and any MCP-compatible client. One memory, everywhere.

## Key facts

- 32 MCP tools, 5 prompt templates (briefing, debrief, project context, meeting prep, post-meeting)
- PostgreSQL + pgvector backend with hybrid semantic/full-text search
- Hosted at 3ngram.ai ($19/mo Individual, free tier available)
- Built by B3dmar ApS

## How it compares

- **vs Mem0**: Mem0 is a developer memory API (flat, untyped). 3ngram is a product with structured types, accountability, and workflows.
- **vs claude-mem**: claude-mem auto-captures flat observations for Claude Code only. 3ngram classifies memories, works cross-platform, and adds workflows.
- **vs Dust**: Dust requires a separate enterprise workspace. 3ngram runs inside your existing AI tools via MCP for $19/mo.
- **vs Glean**: Glean is enterprise search ($200K+/yr, 100-seat minimum). 3ngram is personal AI intelligence for $19/mo.
- **vs ChatGPT/Claude native memory**: Native memory stores preferences. 3ngram adds commitments with deadlines, overdue tracking, reusable workflows, and cross-platform sync.

## Links

- Website: https://3ngram.ai
- Documentation: https://docs.3ngram.ai
- API reference: https://docs.3ngram.ai/api-reference/overview
- Full docs for LLMs: https://docs.3ngram.ai/llms-full.txt
- Comparisons: https://3ngram.ai/compare