AI Agents · Claude · Quick Guide
Three Ways Claude Can Use a Computer
Computer use, Claude in Chrome, and Claude Code. Three surfaces, one rule for picking the right one.
Most people use Claude like a smarter search box: ask, read, copy, paste, repeat. The marketers pulling ahead skip the copy-paste and let it use the computer itself: open the dashboards, read the numbers, write the report. That hour you spend stitching together a weekly recap? Handed off.
Claude does that three ways, and one rule sorts them: prefer a structured tool (an MCP server, a CLI, an API, a connector) whenever one exists. Reach for visual control only at the boundary where structured tools stop. (If you’re still pasting prompts into a chat window, wire up these five connectors first.)
1. Computer use: the tool (the whole screen)
Through the computer use tool in the Claude API, Claude operates a computer the way a person does: it reads a screenshot, moves the cursor, clicks, and types. It works any GUI, even software that was never built to be automated and apps that ship no API at all. It’s the broadest reach and the slowest, and it’s the most developer-facing of the three: you build it into an agent (usually pointed at a sandboxed VM), or use a product built on top of it.
You know the no-API portal that eats your Monday: the regional ad network, the co-op reimbursement system, the vendor dashboard from 2014. This is the surface that can log in and pull the numbers on a schedule, no human babysitting it. Claude already does a tamer, one-click version of this inside your spreadsheet, reading and writing the actual workbook (the $80 Excel feature that’s now $20).
- Use it for: native or legacy desktop apps, GUI-only flows, anything without an API, recurring multi-app jobs you want to schedule.
- Turn it on: it’s an API tool, still in beta. You build with it, or reach for an agent product that already has.
2. Claude in Chrome: your signed-in browser
A Chrome extension that lets Claude read, click, and navigate in your real browser: your tabs, your logins, working alongside you in a side panel. Same weekly-reporting win: four ad platforms behind your login, one summary, your coffee break.
- Use it for: cross-channel ad reporting, research across authenticated sites (Sales Navigator, Apollo, your analytics), pulling a prospect list together, form-filling tied to your account.
- Turn it on: install the Claude in Chrome extension (beta), then hand Claude the task in the side panel.
- Mind the boundary: the site reads Claude’s actions as yours. Anthropic ships permission prompts and site controls for exactly this. Keep sends, purchases, and posts behind your review. Your customers already half-distrust this stuff (49% use chatbots, 71% fear them). Don’t be the brand that proves them right.
3. Claude Code: your machine, through the terminal
The agentic surface, and the one marketers underestimate. Claude Code runs in your terminal or IDE and operates your real machine: running commands, editing files, calling MCP tools. It also connects to Claude in Chrome to drive a browser for building and testing. It’s the tightest build-edit-debug loop of the three, and it’s how people turn one-off prompts into a workflow that runs itself.
Build the landing page, preview it, point at the hero and say “make this the first thing,” watch it reload. Stand up a one-page client report from a research packet. This is the surface behind the marketers shipping their own tools in a weekend (from zero to a self-running factory with Claude Code).
- Use it for: building and shipping pages and small tools, running a local app, automating a recurring workflow, testing what you’re building.
- Turn it on: install Claude Code, then add the Chrome integration for browser automation.
Quick pick
Coding or driving your own machine? Claude Code. A browser task that needs your login? Claude in Chrome. An arbitrary desktop app, or a no-API portal? The computer use tool. And if a connector or MCP exists, use that first.
Resources
Official (Anthropic):
- Computer use, introduced
- Computer use tool (docs)
- Get started with Claude in Chrome
- Claude Code with Chrome
Related from MarketingAlec:
- Three Ways Codex Can Use a Computer — the same map for OpenAI’s stack
- Claude Cowork vs Claude Code: same engine, two doors — pick the right door into the agentic surface