HARPA AI is a browser agent and extension that connects several AI models to web pages. Directories list GPT, Claude, Gemini, Perplexity, DeepSeek and Llama, support for local models, and the option to connect your own model through an API. It is used for summarising pages, writing, data extraction, price tracking and web monitoring, and it can trigger automations through services such as Zapier and Make.

It is available for Chrome, Brave, Opera, Edge and Firefox and can be launched with a keyboard shortcut. A public API is listed. A directory says the extension runs locally and does not log conversations, and that it supports GDPR-oriented handling, but this is a third-party summary of the vendor’s claims, so verify it in the privacy policy.

Pricing sources are inconsistent: one lists plans around $14.50 and $20 per month, Techjockey lists from $13, 10Web says from $12 per month and Toolworthy mentions signals from about $12 per year. A free tier or trial is listed by several sources. Because the extension can read and act on pages, use it with care on sensitive sites and review the permissions you grant. This page is a summary based on public listings and the vendor’s own description, dated 2026-11-13. It was not tested hands-on, and details may have changed.