Open Sentinel

Transparent proxy that sits between your app and any LLM provider, evaluating every response against plain-English rules you define in YAML — before output reaches users.

Source: https://github.com/open-sentinel/open-sentinel | License: Apache 2.0

Get started

1. Install

pip install opensentinel

2. Initialize and serve

export ANTHROPIC_API_KEY=sk-ant-...   # or OPENAI_API_KEY, GEMINI_API_KEY
osentinel init --quick                # creates starter osentinel.yaml
osentinel serve                       # starts proxy on localhost:4000