Building a leads list is straightforward. Finding verified emails and phone numbers for everyone on it is not. It is tedious, manual, and takes hours.
This guide shows how to do the whole thing inside Claude Chat. You research companies, extract C-suite executives, and enrich both emails and phone numbers without ever switching tabs. The demonstration pulled 123 emails and 44 phone numbers from 141 NYC finance executives in one conversation.
What Makes This Lead Generation Tool Different?
Most lead generation tools separate each step. One tool for company research. Another for contact data. A third for email verification. Then you export from each, combine everything in a spreadsheet, and start over for the next campaign.
The Claude + Scalelist MCP workflow combines all four steps inside one chat. You describe what you need. Claude handles research and extraction. Scalelist verifies emails and finds phone numbers. You get a spreadsheet with everything.
No switching tabs. No exporting and importing. One conversation.
What You Need to Get Started
You need two things:
- A Claude account. Free accounts allow one custom MCP connector. If you already use another connector, you will need Claude Pro at $20 per month.
- A Scalelist account. Sign up at scalelist.com. New accounts receive free credits.
How to Connect Scalelist to Claude
This is a one-time setup that takes under 4 minutes.
Step 1. Log into Scalelist. Click API in the left navigation panel. Click the blue New Key button. Copy the API key.
Step 2. Open Claude. Click Customize at the top of the left panel, then Connectors. Click the plus button and select Add Custom Connector.
Step 3. Name it Scalelist. Paste the MCP URL from the description below. After the equals sign at the end of the URL, paste your API key. Click Add. The Scalelist MCP appears in your connectors list.
Step 4. Verify: ask Claude “Are you connected to my Scalelist MCP?” Claude confirms and lists available tools.
Step 1: Build Your Target Company List
Start a new Claude chat. Ask Claude to generate a list of companies in your target market.
In the video, the prompt was: create a list of the top 100 finance companies in New York City.
Claude uses its knowledge base and web search to return the list. It organizes companies by finance sector: hedge funds, private equity, investment banks, asset managers, and insurance firms.
This step uses no Scalelist credits. It is entirely free.
Claude may offer to find emails or contacts at this stage. Decline. You want a clean company list first.
Step 2: Extract C-Suite Executives
Ask Claude to find the C-suite executives from every company on the list. Specify the columns: first name, last name, job title, company name, company website, and company type.
Tell Claude to use web search for this step. The result should be a spreadsheet, not a paragraph or list.
Claude processed all 100 companies and returned 170 C-suite executives in a clean spreadsheet.
This step also uses no Scalelist credits.
Step 3: Find Emails and Phone Numbers
Now ask Claude to find verified emails and direct phone numbers for all contacts. Specify four columns: email, email status, phone number, and phone status.
A permission prompt will appear. Select Always Allow so Claude can call Scalelist without prompting each time.
Scalelist processes all contacts. For each one, it searches its database, verifies the email, and looks for a direct phone number. Claude populates the new columns in real time.
What the Results Look Like
From 141 contacts enriched:
Emails:
- 123 emails found total
- 94 valid (SMTP-verified, confirmed deliverable)
- 29 risky (found but unverifiable)
- 18 not found (zero cost)
Phone numbers:
- 44 direct dials found
- 97 not found (zero cost)
Claude noted that the 31% phone hit rate is typical for C-suite executives. Their personal contact information is kept off public databases.
Pricing recap:
- 1 credit per email found (verification included)
- 20 credits per phone number found
- Nothing found = nothing charged
How to Export Your Leads
Once the enrichment is complete, you have three options.
Option 1: Download directly. Ask Claude to download the spreadsheet. It saves to your computer as-is.
Option 2: Send to Google Drive. If you have connected the Google Drive MCP to Claude, ask Claude to send the file to your Drive folder.
Option 3: Export as CSV. Ask Claude to convert the spreadsheet into a CSV file. This works with any CRM, outreach tool, or automation platform.
The exported file includes all columns: first name, last name, job title, company, website, company type, email, email status, phone number, and phone status.s.
Frequently Asked Questions
Do I need coding skills to use this workflow?
No. You write prompts in plain English. Claude handles all the orchestration. Scalelist handles the data retrieval. There is no code, no API calls, and no command line involved.
Why does Claude try to use Scalelist during the company and executive stages?
Claude recognizes that Scalelist can help at multiple points in the workflow. You should decline at those early stages. Building a clean list first gives you better control over the final data quality before any credits are spent.
What is the difference between valid and risky emails?
Valid means the email passed SMTP verification. The mail server confirmed the inbox exists and can receive messages. Risky means an email was found but the server uses a catch-all configuration that accepts all messages without confirming individual inboxes. Risky emails may still deliver.
Why are phone number hit rates lower than email hit rates?
C-suite executives actively limit their public contact availability. Their direct lines are rarely in public databases. Lower hit rates for senior executives in competitive industries like finance are expected. You are not charged for contacts where no phone number is found.
Can I run this for industries other than finance?
Yes. The workflow works for any industry and any city. Change the prompt in Step 1 to target your specific market: tech companies in San Francisco, healthcare executives in Chicago, or SaaS startups in London.
Conclusion
A leads list with verified emails and phone numbers used to take hours. This workflow does it in one Claude conversation.
Research companies. Extract executives. Enrich emails and phone numbers. Export. All without leaving Claude Chat.
123 emails and 44 phone numbers from 141 NYC finance executives. That is what this lead generation tool delivers.
Create your Scalelist account, connect it to Claude, and build your first verified leads list today.
