Last updated 07-29-2026
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HARPA AI
HARPA AI is a browser extension that puts GPT-5.4, Claude 4.6, Gemini 3.1, DeepSeek, and Perplexity on any web page you visit. Press Alt+A to summarize YouTube videos, draft Gmail replies, rewrite selected text, monitor pages for price drops, and run 100+ page-aware automations without copying content into a separate chat window.
Unlike standalone ChatGPT tabs, HARPA reads the page you are on, so summaries, email drafts, and data extraction stay grounded in the actual source. It also bundles web monitoring, SEO keyword research, Midjourney prompt builders, and Zapier or Make.com triggers in one sidebar, which general chatbots do not ship out of the box.
Marketers, researchers, recruiters, and developers use HARPA to speed up search, inbox triage, copywriting, and lightweight browser automation. The extension runs locally, does not log conversations by default, and supports local Llama models plus your own API keys if you want full control over data routing.
Press Alt+A to access GPT-5.4, Claude 4.6, Gemini 3.1, and Perplexity on any tab
YouTube summarizer pulls transcripts and jumps to timestamps from hours-long videos
Gmail assistant categorizes threads, summarizes long chains, and drafts replies in your tone
Page monitors check websites for price drops, stock changes, or content updates
100+ ready-made page-aware automations for SEO, recruiting, copywriting, and coding
Connects to Zapier, Make.com, and n8n for no-code browser automation chains
Reads the active web page so summaries and drafts stay tied to real on-screen content.
Bundles YouTube summaries, Gmail help, page monitors, and Zapier hooks in one sidebar.
Supports multiple frontier models plus local Llama and custom API keys.
Free browser-session mode lets you test core workflows before paying.
Privacy-focused design runs locally and avoids storing site data on HARPA servers.
Chrome-only today with no Firefox release yet.
CloudGPT token allowances cap heavy users unless you bring your own API keys.
Some sites like Google Sheets and Discord need shield or popup exceptions to work.
Lifetime plan includes only 30 megatokens, so sustained cloud usage still needs top-ups.
What is HARPA AI?
HARPA AI is a Chrome browser extension that adds an AI sidebar to any website. HARPA AI can summarize pages and YouTube videos, draft Gmail replies, rewrite text, monitor pages for changes, and run automations using models like GPT-5.4, Claude, and Gemini.
How much does HARPA AI cost?
HARPA AI offers a free tier with browser-session AI connections. Paid plans start at $12 per month billed annually on the Everyone plan with 75 megatokens per year. The Pros plan is $19 per month with 225 megatokens, and a $240 lifetime license is also available.
Which AI models does HARPA AI support?
HARPA AI supports GPT-5.4, Claude Sonnet 4.6, Gemini 3.1 Pro, DeepSeek V3, Perplexity Pro, Grok 4.1, and Llama 4 through its CloudGPT service. You can also connect your own OpenAI, Google, or Anthropic API keys.
Does HARPA AI work with Gmail?
Yes. HARPA AI includes a Gmail assistant that categorizes incoming mail, summarizes long threads, and drafts contextual replies in your tone. It runs inside the browser alongside your inbox without a separate app.
Can HARPA AI monitor websites for changes?
HARPA AI lets you set page monitors that periodically check a URL for updates such as price drops or content changes. It can also send alerts when products come back in stock on Amazon, Walmart, eBay, and other stores.
Is HARPA AI private and secure?
HARPA AI runs locally in your browser and does not store website data on remote servers by default. Prompts sent to cloud models go to the provider you select, and HARPA AI states it is GDPR compliant with no ad tracking or data resale.