Etch

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Install Etch for Hermes

Elixir-native MCP agent runtime

Prerequisite: you need a project_id and app_token. Sign up in 30 seconds if you don't have them yet. Free tier, no credit card.

Install

pip install world-model-mcp
cd /path/to/your/hermes/project
python -m world_model_server.cli install-hermes \
    --etch-project YOUR_PROJECT_ID \
    --etch-token wm_YOUR_APP_TOKEN

Verify

# Restart Hermes; check its MCP client logs for the world-model-mcp handshake.
# Or use install-hermes-provider to run the Elixir-native memory provider path.

How it works

Two Hermes paths ship: install-hermes registers world-model-mcp as an MCP server Hermes calls (stdio), and install-hermes-provider installs the Elixir-native memory-provider variant. Pick the one that matches how you run Hermes today.

Source: adapters/hermes/ and adapters/hermes-memory-provider/

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