HARPA AI
Hybrid agent + chat extension with website monitoring, summarisation, and natural-language automation.
HARPA AI is a hybrid agent + chat extension with website monitoring, summarisation, and natural-language automation. Supports multiple AI model providers including OpenAI GPT, Anthropic Claude, and Google Gemini through a BYOK approach.
About HARPA AI
HARPA AI is a browser extension that combines an AI agent and chat interface to automate web tasks, monitor pages, and summarize.
Its distinctive combination: it runs web automation like page interaction and data extraction, monitors websites to detect page changes and trigger AI-driven actions or summaries, and works across multiple model providers — OpenAI GPT, Anthropic Claude, and Google Gemini — through a bring-your-own-key approach. It installs as an extension that sits inside your browsing workflow, with no separate application.
It suits people who want AI automation and monitoring where they already browse and who are willing to supply their own API keys. It's a weaker fit if you'd rather not obtain and manage third-party API keys, since it relies on BYOK, if you hit the free tier's limits on AI queries and advanced automation, or if you need to work outside the browser — its functionality is confined to that environment and depends on web page accessibility.
Among Browser Extensions, HARPA's angle is pairing agent-style automation and page monitoring with your choice of model provider rather than locking you to one.
Sources: https://harpa.ai, this listing
HARPA AI pros and cons
Pros
- Supports multiple AI model providers including OpenAI GPT, Anthropic Claude, and Google Gemini through a BYOK approach.
- Functions as a hybrid agent and chat interface that can perform web automation tasks such as page interaction and data extraction.
- Includes website monitoring capabilities that can detect page changes and trigger AI-driven actions or summaries.
- Available as a browser extension that integrates directly into the user's web browsing workflow without requiring a separate application.
Cons
- Free tier imposes usage limits on AI queries and advanced automation features.
- Relies on a BYOK model, requiring users to obtain and manage their own API keys from third-party providers.
- Functionality is confined to the browser environment and depends on web page accessibility.
Tagged
- Bring Your Own Key
- Supports Claude
- Supports GPT
- Supports Gemini
- Web-based
- Agentic Mode
- Freemium
HARPA AI alternatives
More from Browser Extensions.
- 01Freemium →Sider
ChatGPT + Claude sidebar for any browser tab — chat about the page, summarise, translate, draw.
- 02→Hintly for Google Meet™
Real-time hints for every term you miss on Google Meet
- 03→Retriever AI
Free AI browser agent: find leads, reach out, apply to jobs
- 04→Lisen
Free Read Aloud with Cartesia Voices
- 05→AI Toolbox 3.0
Search, organize and export every AI chat in one place
- 06→Sider Code
Reshape any website with plain words via Sider extension
HARPA AI pricing
Read off the vendor’s own pricing page on 2026-09-16.
| Plan | Price | Best for |
|---|---|---|
| S1 (Everyone) | $ 12 per month, billed annually | Solo founders who want the Cloud GPT connection with most features and don't need scheduled automation |
| S2 (Pros) | $ 19 per month, billed annually | Power users running heavy page-aware or automation workloads |
| X (Life) | $ 240 / LIFE paid once | Single users with their own API keys who want a one-time payment and unlimited Web Session connections |
| DEMO (free) | Free | Trying HARPA before paying |
Full HARPA AI pricing breakdown — limits, hidden costs, change log →
Related reading
Featured on Vibedonalds
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</a>Frequently asked questions
- What is HARPA AI?
- HARPA AI is a hybrid agent + chat extension with website monitoring, summarisation, and natural-language automation.
- How much does HARPA AI cost?
- HARPA AI pricing, read from the vendor's page on 2026-09-16: S1 (Everyone) — $ 12 per month, billed annually; S2 (Pros) — $ 19 per month, billed annually; X (Life) — $ 240 / LIFE paid once; DEMO (free) — Free.
- Is HARPA AI free?
- Yes. HARPA AI has a free plan (DEMO (free)) — 10 messages/day on Web Session (ChatGPT, Claude, Gemini); up to 100 total AI command runs. Verified against the vendor's pricing page on 2026-09-16.
- What platforms does HARPA AI support?
- HARPA AI runs on web.
- What are the alternatives to HARPA AI?
- Similar tools in Browser Extensions on vibedonalds: Sider, Hintly for Google Meet™, Retriever AI, Lisen.
- What are the downsides of HARPA AI?
- Free tier imposes usage limits on AI queries and advanced automation features. Relies on a BYOK model, requiring users to obtain and manage their own API keys from third-party providers. Functionality is confined to the browser environment and depends on web page accessibility.