ContextBolt vs HARPA AI · an honest comparison

ContextBolt vs HARPA AI

HARPA does things to the page you are on. ContextBolt remembers the pages you already left.

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Basic is free · no account, no card · capped at 150 bookmarks
Bookmarks MCP server for Claude, Cursor & Codex Claude Desktop · ContextBolt connected example library
What did I save about rate limiting?
Used search_bookmarks
Token buckets beat fixed windows for bursty trafficX · @dan_abramov
How we rate limit 40k req/s on one boxReddit · u/pgstash
Rate limiting is a product decision, not a configPriya Patel
Searched 847 saves across X, Reddit and LinkedIn

Web pages and social saves in one library. On Pro, your agent searches it without you leaving the conversation. Example exchange.

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Here is the verdict.

ContextBolt is the pick if the problem is finding what you already read. It captures your X, Reddit and LinkedIn saves automatically, keeps the text of any page you save, tags it with AI, and on Pro your agent can search the lot by meaning. HARPA is a browser automation tool that fills forms, scrapes tables and watches pages for changes, which is a different job, and plenty of people run both. Automation without good inputs just does the wrong thing faster. Basic is free. Pro is $6 a month.

Where ContextBolt wins
  • It remembers, which automation cannotA scraper reads the page in front of it. ContextBolt holds the two hundred pages you decided were worth keeping, and can hand any of them back six months later.
  • Your social saves arrive on their ownHit save on X, Reddit or LinkedIn and it lands in the library. No workflow to build, no selector to maintain when the site changes.
  • It is a server, not another clientPro exposes your saves over MCP, so the agent you already use can read them. You are not moving into a new chat interface to get the benefit.
What HARPA AI is built for
  • Doing things, not keeping thingsForm filling, clicking, multi-step workflows, structured extraction to CSV or JSON. That is HARPA's job. ContextBolt keeps the pages and posts those workflows would otherwise forget.
  • Summaries and page monitoringHARPA summarizes pages, PDFs and videos, and watches pages for price or content changes. ContextBolt keeps the source instead, and your agent can summarize what it retrieves.
  • Different ends of MCPHARPA acts as an MCP client that calls tools inside its own interface. ContextBolt is a server that answers them, so it slots into the agent you already use. Check your setup supports the connection you need.

Here is every feature side by side.

FeatureContextBoltHARPA AI
What it is for Keeping and finding what you saved Acting on the page in front of you
X, Reddit and LinkedIn saves Captured as you save them, nothing to resave (ahead) Not a capture tool
Finding an old source Ranked local search over text and tags. Pro adds semantic search over MCP (ahead) No saved library to search
Summarizing a page Your agent summarizes what it retrieves Summarizes pages, PDFs and YouTube videos
Pulling data out of a page Keeps the article text of the page so search works. Not an extraction tool Structured CSV and JSON extraction
MCP role Server. Your agent queries your library Client. It calls other tools

ContextBolt ahead on that row

What each one costs.

ContextBolt Basic (free) + $6/month Pro AI search, MCP endpoint, social bookmarks
HARPA AI Free (limited) / ~$12/mo / ~$19/mo / $240 lifetime View pricing

The longer story.

Search results put these two side by side because both are AI extensions for Chrome. They do almost nothing in common.

HARPA is a robot for the tab you are looking at. It fills the form, clicks the buttons, scrapes the table into a CSV, summarizes the PDF, and tells you when the price changes. It is good at that.

ContextBolt is the memory. It keeps the pages you saved and the X, Reddit and LinkedIn posts you bookmarked, tags them on arrival, and hands any of them back months later.

Automation is fast. It is not a memory

A scraper reads the page in front of it and then forgets. That is the correct design for what it does, and it is why automation never solves the problem people actually complain about.

The complaint is “I know I read something about this”. Not last week’s tab. Something from March, on a company blog, that explained the thing properly. A robot cannot fetch that, because nothing kept it.

ContextBolt keeps it. Web pages save in one click with their article text. Your X, Reddit and LinkedIn saves arrive on their own, because it captures the save as you make it. Everything gets AI-tagged as it lands, so searching “onboarding friction” finds the thread that only ever said “we lost them at the email step”.

One is a client, the other is a server

Both mention MCP, and this is the bit worth getting straight because it changes how each one fits your setup.

HARPA is a client. It calls tools, inside its own interface. ContextBolt Pro is a server. It answers questions from whatever agent you already use, so Claude or Codex can search your saves mid-conversation without you moving anywhere.

That difference decides how much rearranging each one asks of you. The MCP explainer covers the connection model if this is new. Claude, Claude Code, Cursor and Codex all connect to the endpoint.

What each costs

ContextBolt Basic is free with no clock on it, and Pro is $6 a month with no annual plan, removing the 150 cap, adding cloud sync and the MCP endpoint.

HARPA has a free tier and paid plans with usage limits that are worth reading in detail, since automation volume is what you are actually buying there. They are different line items solving different problems, so the comparison is not really a price one.

Where HARPA AI still fits

HARPA is for repetitive browser work. Form filling, clicking through multi-step workflows, scraping tables to CSV, summarizing the open PDF and watching a page for a price change. If that is your bottleneck, that is HARPA’s job.

It is not the job this page is about. ContextBolt is not an automation tool and runs in desktop Chrome, and it is built for the thing a robot cannot do, which is remembering what you read. Plenty of people run both, which costs less than either tool doing the other one badly, and Basic is free.

The test

Install ContextBolt and save nothing differently for a week.

On day eight, ask it for something you half-remember from months ago. No automation tool can answer that question, because none of them kept anything. Start free with ContextBolt Bookmarks, or read how to turn your bookmarks into a second brain.

Common questions.

Do these two actually compete?

Not really, and it would be dishonest to pretend they do. HARPA acts on pages. ContextBolt remembers them. People who use both tend to automate a task in HARPA and keep the research behind it in ContextBolt. Pick on the problem you have this week, and since Basic is free, ContextBolt costs nothing to start.

Can ContextBolt automate anything?

No. Form filling, clicking, scheduled monitoring and scraping to CSV are HARPA's job. ContextBolt saves web page text, captures your social saves, tags them and answers search, so the research behind any task is still there when you need it again.

Both mention MCP. Is that the same thing?

Opposite ends of it. HARPA is a client, so it calls tools. ContextBolt Pro is a server, so it answers them. That means ContextBolt slots into the agent you already use rather than asking you to move somewhere new. Claude, Claude Code, Cursor and Codex all connect to the endpoint.

Does ContextBolt summarize what I save?

No, and that is deliberate. It stores the article text and tags it so search works, rather than replacing the source with a summary you then have to trust. The point is getting you back to the original when you need it.

What can I do without paying?

Basic is free with no clock on it. One-click web saving with the page text, automatic capture of your X, Reddit and LinkedIn saves, AI tagging and ranked local search. Basic is capped at 150 bookmarks until you go Pro.

Go deeper: ContextBolt vs Monica · ContextBolt vs Sider AI · What Is the Model Context Protocol (MCP)? · How to Turn Your Bookmarks into a Second Brain · all comparisons

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Every save, findable.

Free up to 150 bookmarks. Pro removes the cap and adds the AI connection, for $6 a month.

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