MCP server + Colab backend for mechanistic interpretability research. Bring-your-own-agent. Privacy-first.
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# openinterp-mcp > **v0.1.0 beta · API may shift before v1.0** > > MCP server + Colab backend for mechanistic interpretability research. > **Bring your own agent.** Works with Claude Code, Cursor, Cline, OpenHands, Aider, or any harness that speaks MCP. > **Privacy-first.** We do not host inference. We do not custody your keys. Your Colab session, your model, your data. <a href="https://www.producthunt.com/products/openinterpretability?embed=true&utm_source=badge-featured&utm_medium=badge&utm_campaign=badge-openinterpretability" target="_blank"><img src="https://api.producthunt.com/widgets/embed-image/v1/featured.svg?post_id=1146555&theme=light&t=1778728126905" alt="OpenInterpretability - Open-source toolkit to audit what your LLM knows | Product Hunt" width="250" height="54" /></a> ## What this is A research toolkit that turns probe-causality and SAE-feature experiments into agent-callable primitives. Researchers run the model on their own compute (Colab Pro recommended), expose an HTTPS endpoint over ngrok, and let an LLM agent drive experiments via **8 typed MCP tools**. The 8 MCP primitives: | Tool | What it does | |---|---| | `colab_attach` | Attach to a running Colab/vast.ai/runpod session via its public HTTPS URL. Validates `/health`, caches the endpoint locally. | | `colab_status` | Health check — loaded model, probes in memory, captures held. | | `list_probes` | List probes currently loaded in the backend (model_id, layer, position, source). | | `capture_acts` | Run a forward pass with hooks, extract activations at specified layers/positions. Returns `capture_id`. | | `probe_eval` | Apply a loaded probe to a stored capture, return AUROC + per-sample scores. | | `steer` | Inject direction×α at layer L. Returns base + steered generation + control-token-normalized Δrel (paper-6 protocol). | | `sae_lookup` | Decompose a stored activation into top-K SAE features with auto-interp descriptions. | | `causality_protocol` | Run the three mandatory checks (rand…
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