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ClaudeAI agency owner (r/agencynewbies)

A Claude agent finds leads and writes cold emails that book 4-5 calls a week

In plain words

A Claude agent scans for businesses showing signs they need help, saves them to a sheet, reads their websites and writes personal emails.

What happened: About 400 emails a day; 23 booked sales calls in a month (their own figures)

These numbers come from the builder and haven't been checked independently.

Source: reddit.com ↗

⏱ About 1-2 weeks to set up🎓 Comfortable with no-code toolsEasier with a builder's help

How to do it yourself

Our suggested steps. The company didn't publish theirs.

  1. 1

    Define your ideal customer and 2-3 buying signals.

  2. 2

    Have the agent collect matching businesses into a sheet.

  3. 3

    Write emails with the prompt below from each website.

  4. 4

    Warm up inboxes and start with 50 a day.

  5. 5

    Read replies daily and tighten targeting.

The instructions to give the AI

Paste this into Claude (the free plan is fine), swap the [brackets] for your details, and test it on a few real examples.

This is one part of the setup. It won't connect to your phone, inbox or other apps on its own; the steps above cover that.

Agent instructions (prompt)

Here is [company]'s website text: [paste]. Write a cold email under 90 words: one specific observation about their business, the problem it likely causes, how we fix it in one line, and a soft question. No flattery, no links.

[Highlighted] = replace with your own details before you run it.

What you should get back: "Hi Tom — your booking page only works on desktop, so mobile visitors probably bounce. We fix that in a week. Worth a quick chat?"

Written by Quickly and Good, inspired by this case.

More detail: tools, prices and what you'll need

The company used: Claude agent + Google Sheets + email sender

You could use: Claude + Google Sheets + a cold email tool (e.g. Instantly)

  • Claude

    AI assistant for writing, analysis and long documents; can connect to your tools.

    Free plan; Pro $20/mo (monthly) · Official site ↗

Prices from each tool's own pricing page, checked Oct 2026.

What you'll need

  • ☐An automation tool (n8n, Make or Zapier)
  • ☐Connections to each app involved (email, CRM, sheets, calendar)
  • ☐An AI model account/API key
  • ☐The agent instructions (prompt)
  • ☐Error handling: what happens when a step fails
  • ☐Testing with real data for a week
  • ☐A human review step before anything goes out to customers

Can I do this myself?

Yes if you have built a Zapier/Make/n8n workflow before. If those words are new, hire a builder.

Useful? Vote so others find it.

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