Prospecting List Builder
A skill that builds you a clean, verified B2B prospecting list, every firm matched to your exact customer and ready for outreach, in about 15 minutes.
- ✓Cross-checks firms in Apollo and pulls verified emails, so your cold outreach actually lands.
- ✓Every firm matched to your exact customer: who you sell to, their industry, size and location.
- ✓Run it any time for a fresh Excel: website, LinkedIn, phone, revenue, and whether they're growing.
If you don't have the Claude desktop app, you'll need it first, so download it here.
(You'll also need Claude Pro, around $20, and a free Apollo account.)
Install Cowork
Download the Claude desktop app, sign in on a paid plan, then look at the top left and click the Cowork tab. It has to be the desktop app, not the browser, because that is the version that can save skills, work in your folders and connect to your tools.
Give it one folder
Cowork works inside one folder on your computer, and it can't see anything outside it.
- In the Cowork tab, click New Task, then Work in a Project, then Choose a folder.
- Create a brand new folder and select it (I call mine Claude Playground).
From now on every list the skill builds lands in this folder, like a colleague putting finished work on your desk.
Install the skill
A skill is a saved set of instructions Claude follows every time. You install it once, then it's yours.
Download the skill- It saves a small file, vet-then-scrape-coldlist.skill, to your Downloads.
- In a new Cowork task, drag the file into the chat, then click the Save skill button that appears on it.
- Check it worked: click + at the bottom of the chat, then Skills. You should see it listed.
You only do this once.
Get your Apollo account
Apollo is the biggest B2B contact database out there. The skill uses it to cross-check firms and pull verified emails, so your messages actually land.
- Go to apollo.io and sign up for free. Use your work email, no card needed.
- Back in Claude: Customize > Connect your apps, find Apollo, log in and approve.
On cost: the skill runs as cheap as possible. Any step that costs money, it stops, shows you the exact price and asks first. My last list of eighty contacts came in under a dollar.
Run it
- Open a New Task in your project folder.
- Click + > Skills > vet-then-scrape-coldlist.
- Answer the eight questions in plain English: who you sell to, industry, size, location.
Then leave it. Ten to fifteen minutes later an Excel file lands in your folder: every firm, website, LinkedIn, phone, revenue and whether they're growing. That's your list, ready for outreach. Run it again any time you need a fresh one.
Before you finish (quick checks)
- ›Claude desktop app installed, on a paid plan.
- ›Cowork tab open, one folder selected.
- ›Skill visible under + > Skills.
- ›Apollo connected.
- ›Skill run, Excel in your folder.
