Free Tool · Claude Skill

You bring the list. Claude writes the emails.

Install once. Drop your URL + a CSV of prospects in any Claude chat. Get a research brief + 2 personalized cold emails per prospect. Same engine as the web tool — but no 10-prospect cap. BYOL: bring your own list, any size.

Option 1 · No terminal needed

Install in claude.ai (web)

  1. 1
    Download the skill bundle (ZIP, ~5KB).
  2. 2
    In claude.ai, go to Settings → Customize → Skills → Upload a skill.
  3. 3
    Select the downloaded ZIP. The skill appears in your list.
  4. 4
    In any chat: attach your prospect CSV + your URL. Say "build a campaign from this list".
↓ Download skill ZIP
Option 2 · For Claude Code users

Install in Claude Code (terminal)

  1. 1
    Paste this one line into your terminal:
  2. 2
    mkdir -p ~/.claude/skills/campaign-builder && \ curl -L https://raw.githubusercontent.com/Buzzlead-dev-org/campaign-builder/main/skill/SKILL.md \ -o ~/.claude/skills/campaign-builder/SKILL.md
  3. 3
    Restart Claude Code.
  4. 4
    Say "build a campaign from prospects.csv with my site as sender".
What it looks like

One file in. A campaign-ready CSV out.

You
build a campaign from this list (attaches prospects.csv with 25 names)
Claude
Running Campaign Builder. Sender context: your site. 25 prospects in the file. This will take ~8 minutes.
Claude
✓ Read your site — built sender profile
Claude
✓ [1/25] Drew Houston · CEO @ Dropbox
Claude
✓ [2/25] Sarah K. · VP Sales @ Initech
Claude
… [continues] …
Claude
Done in 7m 48s. 24 written, 1 skipped (site unreachable). CSV saved. Show first email?
API key you’ll need

Just one. Approximate cost: ~$0.05 per prospect (so 25 prospects ≈ $1.25, 100 ≈ $5).

ANTHROPIC_API_KEY
Site analysis + research + email generation
Get one →
Also available as

Same engine, three surfaces.

Web tool
Run in the browser →
No install. 10 prospects per run, no API key needed.
GitHub · CLI
Run from your terminal →
npx @buzzlead/campaign-builder. Unlimited list size.
Ready?

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