What This Does
Scalelist MCP uses the Model Context Protocol to connect Claude with your Scalelist account.
This will allow you to perform the following actions inside Claude:
Find leads by job title, seniority, company, industry, company size and location
Count how many people match your search, to see the size of your market
Find leads with their emails from any domain or company name (up to 100 per company)
Find emails for a single lead
Find emails in bulk from a CSV, Excel file or list of leads
Find mobile numbers for a single lead
Find mobile numbers in bulk from a CSV, Excel file or list of leads
Check your credits and your plan
Claude will call Scalelist in the background and return verified results instantly. Every find costs credits from your Scalelist plan. No result = no charge.
What It Costs
1 lead found = 1 credit
1 email found = 1 credit
1 mobile number found = 10 credits
What You Need
A Scalelist account (sign up here)
Claude Pro, Max or Team - Connectors aren't available on the free plan
Setup - 1 Minute
1. Go to claude.ai (or your Claude desktop app), and log in to your Claude account.
2. Click on "Customize" in the left sidebar.
3. Click on "Connectors" → then click "+ Add" at the top right.
4. Select "Add custom connector".
5. Fill in:
Name: Scalelist
URL:
https://mcp.scalelist.com/mcp
Click Continue.
6. A browser tab will open automatically so you can log in to your Scalelist account. Sign in with Google, Microsoft, or your email and password. Click Authorize.
When you see "Authentication complete", close the tab.
7. Turn it on in a conversation Open a new Claude chat → click + in the message bar → Connectors → toggle Scalelist on.
8. Confirm it's working Type: "Check my Scalelist credits"
Claude should return your balance. If it does, you're live.
Try These Prompts
"How many Heads of Marketing work at software companies in Germany with 50 to 200 employees?"
"Find 25 founders of fintech companies in London."
"Find the email of Jane Smith at acme.com."
"Find the emails of these 40 people" + attach your CSV or Excel file.
Tip: ask Claude to count first. You see the size of your market before you build your list.
Troubleshooting
"No Connectors option in Claude" → You need a Claude Pro or Max plan. The free plan doesn't support connectors.
"Auth window opened but Claude shows disconnected" → Close the browser tab and go back to Claude - the connection finalises automatically. If it still shows disconnected, repeat from Step 3.
"Claude can't search for leads" → Start a new chat so Claude loads the latest Scalelist tools. If it still can't, remove the connector and add it again (Steps 3 to 6).
"Claude says the count limit is reached" → You can run a limited number of counts per minute and per day. Wait one minute and try again. If the daily limit is reached, it resets within 24 hours. Paid plans get a higher limit.
"Scalelist is connected but Claude returns nothing" → Check two things: (1) the connector is toggled on in + → Connectors for this conversation - it needs to be enabled per chat. (2) Your credit balance in Scalelist - if you're at zero, Claude can't return results.
"Claude found fewer leads than I asked for" → Claude never returns more leads than your credits can pay for. Top up your credits and ask again.
"No result for a specific contact" → Try again with the person's full name and company name (preferably with the company domain) spelled out. Nicknames or abbreviations reduce match accuracy. No credits are charged for empty results.
"I want to disconnect" → claude.ai → Customize → Connectors → Scalelist → Remove.
Need Help?
Chat with us on scalelist.com or email hello@scalelist.com.