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How to check high-entropy secret detection offline in minutes with Cosy Redact Gateway

Run a local demo that shows how the gateway handles an unlabeled random string with and without detection.

Who it is forA developer or security reviewer who wants proof that the gateway catches random credentials without a known prefix before trusting it with real prompts.

The problemVendor claims about secret detection are hard to judge without seeing how the detector treats a value that has no key prefix or password label.

The outcomeYou see the gateway's output for the same synthetic string under three detector settings, plus the exact restore check, without any network call or API key.

What you need first

  • Node.js 20+, Git, and a terminal
  • An OpenAI or Anthropic API key and an available model name, only if you make live upstream calls
  • A trusted environment for running the gateway, since it handles raw requests and provider credentials

Steps

  1. Clone the repository with git clone https://github.com/CassiopeiaCode/CosyRedactGateway.git
  2. Enter the project folder with cd CosyRedactGateway
  3. Run the offline demo with node scripts/demo-high-entropy.mjs
  4. Run the regression and entropy tests with npm test and npm run entropy-report

Prompt for your agent

Clone https://github.com/CassiopeiaCode/CosyRedactGateway, run `node scripts/demo-high-entropy.mjs` from the repo root, and report the output for the PSIBEG, H, and all-enabled settings. Verify that the restore check passes and state that the results describe only the synthetic samples, not production leak rates.

Caveat. The demo and calibration numbers use synthetic samples only, so they do not measure how the gateway performs on your own data.

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