Post a message in Slack when a subscriber’s details change in Mailchimp

What each client fills in

Slack: Channel

For example #leads or C0123456789

Mailchimp: Audience ID

Audience → Settings → Audience name and defaults: the Audience ID.

The accounts it needs

Each is the client’s own, stored encrypted and never copied between clients. Until one is added the client’s checklist shows it, and nothing runs.

• 

  In the client’s Mailchimp: Profile → Extras → API keys → Create A Key. The server prefix is the part after the dash (us21).

• 

  In the client’s Slack: api.slack.com/apps → Create New App → OAuth & Permissions → add the chat:write scope (and channels:history, plus groups:history for a private channel, for the message trigger) → Install to Workspace → copy the Bot User OAuth Token. Invite the app to the channel.

After you install it

It lands switched off. The client’s checklist holds exactly this:

1. Connect the client’s Mailchimp, for “A subscriber’s details change”
2. Connect the client’s Slack, for “Post a message”
3. Fill in Mailchimp: Audience ID (Audience → Settings → Audience name and defaults: the Audience ID)
4. Fill in Slack: Channel (For example #leads or C0123456789)