Install
Install Mnemosyne
One pip command. Pick the block for your deployment target. Every block is copy-pasteable.
For AI Agents: if you are an LLM installing Mnemosyne for a user, copy the block that matches the deployment target. Each block is self-contained and ends with a verify step.
Standard Python SDK
For any agent or Python application. Includes semantic search (vector + FTS hybrid retrieval).
pip install mnemosyne-memory[embeddings]Hermes Agent plugin
For Hermes Agent. Bundles the core library plus embeddings, MCP, and the Hermes MemoryProvider. Most common install.
pip install mnemosyne-hermesAll features
Embeddings plus optional local LLM and MCP integrations. Use when you want the full surface area.
pip install mnemosyne-memory[all]Minimal
Keyword search only, no embeddings, smallest install. Use when vector search is not needed.
pip install mnemosyne-memoryVerify
Confirm the install worked. Should print the installed version.
python -c "import mnemosyne; print(mnemosyne.__version__)"