ctx4.ai
A Notion for your AI agents
Portable context and long-term memory for Claude & ChatGPT.
Works via MCP. Your data lives in your GitHub repo — you own it.
Free and open source.
Personal Context
Your preferences, role, and working style. The AI loads this at the start of every conversation.
Knowledge Base
Processes, docs, and reference material. Organized by you or the AI.
Skills
Reusable routines and workflows. Teach the AI once, use everywhere.
Open Source— Apache 2.0
Free— Cloud or self-hosted
Your Data— Lives in your GitHub repo
Portable— Works with any MCP client
Open Source— Apache 2.0
Free— Cloud or self-hosted
Your Data— Lives in your GitHub repo
Portable— Works with any MCP client
How it works
Connect
Add the MCP server to Claude or ChatGPT
Context loads
The AI reads your instructions, knowledge, and skills
AI remembers
New learnings are saved to your repo automatically