ActiveCampaign uses an account-specific subdomain pattern (e.g., acmecorp.api-us1.com). You'll grab both the URL and the key from one screen.
Before you start
- Any ActiveCampaign plan with API access (essentially all of them).
Step 1 — Find your API URL and key
Log in to ActiveCampaign. Click Settings (gear icon, bottom left).
Click Developer in the left sidebar.
On this screen you'll see:
- URL — looks like
https://yourcompany.api-us1.com - Key — a long string of letters and digits
Copy both. You'll need them in a sec.
Step 2 — Connect in Anexus
In Anexus, Settings → CRM Integrations → ActiveCampaign → Connect.
Enter:
- API URL: the full URL from ActiveCampaign (e.g.,
https://yourcompany.api-us1.com) - API Key: the key from the same screen
Click Save & connect.
What syncs to ActiveCampaign
Each captured contact becomes (or updates) an ActiveCampaign Contact with:
- Email (the unique key — we use ActiveCampaign's
syncendpoint so duplicates are merged automatically) - First name, last name
- Phone (if provided)
To backfill, click Sync past contacts on the ActiveCampaign card.
If something goes wrong
"ActiveCampaign rejected the API key"
Most often the URL is missing the https:// prefix, or the API key has a typo. Re-copy both from Settings → Developer.
How to disconnect
Click Disconnect in Anexus. There's no way to revoke just this key in ActiveCampaign — to invalidate it you'd need to regenerate the account's API key (which also breaks any other integrations using it).