Learning Objective
By the end of this guide, you’ll know how to connect Clay to lemlist using your lemlist API key and then use lemlist actions inside a Clay table to add leads to campaigns, look up leads, or update lead information.
Why This Matters
Clay is a data enrichment and workflow automation platform. Integrating it with lemlist lets you:
Automate lead management – Add enriched leads from Clay directly to lemlist campaigns
Update lead data – Keep contact information synced between platforms
Build workflows – Combine Clay enrichments with lemlist outreach actions
Without the integration, you’ll need to export from Clay and import into lemlist manually—slower and more error-prone.
Prerequisites
Clay account with access to tables and enrichments
lemlist account with API access
A lemlist campaign (you’ll need its Campaign ID)
Step 1: Open Clay Settings
Log in to Clay.
Open the profile menu and click Settings.
Step 2: Go to Connections
In Settings, click Connections in the left sidebar.
Step 3: Add a lemlist Connection in Clay
Click Add connection.
In the search bar, type lemlist, then select lemlist from the list.
Step 4: Get Your lemlist API Key
Clay will ask you for a lemlist API key. To find it, open lemlist in a new tab.
Log in to lemlist.
Click your profile/name in the bottom-left, then select Settings.
In Settings, click Integrations, then click Generate in the API section.
In the Generate a new API key pop-up, enter a name for your key and click on Create Key
Copy the API key that appears and keep it somewhere secure.
Important: Keep your API key secure and do not share it publicly.
Step 5: Paste the API Key into Clay
Return to Clay.
Paste your lemlist API key into the API key field.
Click Save.
Step 6: Add a lemlist Action in a Clay Table
Open the Clay table where you want to run lemlist actions.
Click Add enrichment.
Search for lemlist and choose one of the available actions (for example: Add Lead to Campaign, Lookup Lead in Campaign, or Update Lead in Campaign).
Step 7: Find Your lemlist Campaign ID
Most lemlist actions require a Campaign ID. You can find it in the campaign URL in lemlist—it usually starts with CAM_.
In lemlist, open the campaign you want to use.
Copy the Campaign ID from the browser URL.
Step 8: Configure the lemlist Action in Clay (Example: Add Lead to Campaign)
In the Clay enrichment setup, paste the Campaign ID.
Map the required Clay columns (for example, Email, and any other fields you want to send).
How You’ll Know It Worked
lemlist appears in Clay → Settings → Connections as connected.
Leads appear in your lemlist campaign after you run the Clay enrichment.
Troubleshooting
Issue: API key not working
Make sure the entire key was copied (no extra spaces).
Generate a new API key in lemlist (Settings → Integrations).
Confirm your lemlist plan/user has API access.
Issue: Campaign ID field shows no options / action fails
Verify the Campaign ID starts with CAM_ and was copied from the campaign URL.
Confirm required fields (especially Email) are mapped in Clay.
Check for duplicates—lemlist may reject leads that already exist in the same campaign.