hippocampus
Active·★ 13·AGPL-3.0·Updated 2026-09-29
Hippocampus is an open-source, self-hosted MCP memory server that provides persistent, cross-platform memory for AI assistants. Deploy once and connect to multiple AI platforms such as Claude, ChatGPT, Gemini, Cursor, and Perplexity, enabling them to share and recall context seamlessly. It uses a knowledge graph with local embeddings and encrypts the database at rest.
#ai#chatgpt#claude#encryption#gemini#knowledge-graph#mcp#mcp-server
01
Features
01Cross-platform memory sharing across major AI tools via MCP protocol
02Knowledge graph storage with entities, observations, and relationships
03Semantic search using local embeddings (all-MiniLM-L6-v2)
04AES-256 database encryption via SQLCipher, including embedding vectors
05Self-contained OAuth 2.1 authentication with PKCE
02
Compatibility
Claude.ai (browser + mobile)
Native support
Verified via docs
Claude Code
Native support
Verified via docs
Claude Desktop
Native support
Verified via docs
ChatGPT (web + mobile)
Native support
Verified via docs
ChatGPT API
Native support
Verified via docs
Gemini CLI
Native support
Verified via docs
03
Quick start
1
$ git clone https://github.com/karrolcia/hippocampus.git
2
$ cd hippocampus
3
$ npm install
4
$ cp .env.example .env
5
$ npm run dev
04
Use cases
↳Store and recall personal preferences across different AI assistants
↳Maintain project context and decisions when switching between AI tools
↳Avoid repeating information when using multiple AI platforms simultaneously
05
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