Promptmkr Companion — Privacy Policy

Promptmkr Companion is a free Chrome extension that helps users grade, improve, and refine prompts they are about to send to ChatGPT or save in Promptmkr. This page describes exactly what the extension collects, stores, transmits, and shares.

What the extension does

The extension runs ONLY when you:

• Visit https://chatgpt.com/*. A content script detects the active prompt input so it can read the current prompt text on demand.
• Open the Promptmkr Companion popup. The popup may send the prompt text to Promptmkr's grading, improvement, or refinement APIs.

The extension does not run on any other site.

What we collect

When you click Grade this prompt, Improve prompt, or one of the refiner buttons (Add more logic / Simplify), the extension sends the prompt text you supplied to one of these endpoints on https://www.promptmkr.com:

• POST /api/companion/grade
• POST /api/companion/improve
• POST /api/companion/refine

These endpoints process the prompt text to return a grade, an improved version, or a refined version. Each request is rate-limited per IP address.

We log the request method, response status, and a short summary of errors for operational reliability. We do not link this telemetry to a personal account because the extension does not require sign-in.

We do NOT collect:

• your name, email, or any personally identifying information
• your ChatGPT conversation history beyond the single prompt text you choose to send to the extension
• payment information
• analytics tracking across the rest of the web
• third-party advertising data

What is stored locally

The extension uses chrome.storage.local to persist:

• the most recent prompt text you used
• the most recent grade result
• the most recent improved prompt
• the most recent refined prompt
• the timestamp of the last save

This local state expires after 30 minutes. It never leaves your browser unless you explicitly click an extension action that triggers an API request (Grade / Improve / Add more logic / Simplify), in which case only the prompt text you submit is transmitted.

You can clear local state at any time by removing the extension or clearing storage from chrome://extensions.

What we share with third parties

To produce improved and refined prompt outputs, prompt text submitted to POST /api/companion/improve and POST /api/companion/refine is forwarded to Anthropic's Claude API as part of generating a response. Anthropic's processing of that text is governed by Anthropic's own terms and privacy policies. We do not retain prompt text in our own logs.

We do not sell or rent any data. We do not share data with advertisers.

Permissions the extension requests

Account, sign-in, and saved prompts

The extension itself does not require a Promptmkr account. If you click Refine in Foundry →, the extension opens https://www.promptmkr.com/playground in a new tab and prefills your current prompt. Using the Foundry there requires a Promptmkr membership and is governed by the main Promptmkr Terms and Privacy Policy.

Contact

For privacy questions or to request data review, contact: jon@promptmkr.com.

Promptmkr is operated by Jon Hardisty (East Honolulu, Hawaii, USA).