Campaign Monitor integration: API key auth, client and list selection

Last updated May 19, 2026Integrations

Campaign Monitor uses API-key authentication. It supports multi-client setups where one Campaign Monitor account hosts multiple client sub-accounts.

Where to find your Campaign Monitor API key

  1. Sign into Campaign Monitor.
  2. Open Account Settings → API Keys.
  3. Generate or copy an existing key.

Connecting Campaign Monitor

  1. Bulk Upload → Connect Email Platform → Campaign Monitor.
  2. Paste the API key.
  3. If your account has multiple clients, you'll pick the client to verify against at list-selection time.
  4. Save Connection.

Cost

1 credit per subscriber verified.

Next steps