Add or update Mailchimp subscribers from new Square transactions

First, we need to connect Square and Mailchimp to Zapier.

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  Create Zapier account.

  Create Zapier account if you don't have one.

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  Connect Square to Zapier.

  Give Zapier access to your Square account, using Square credentials.

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  Connect Mailchimp to Zapier.

  Give Zapier access to your Mailchimp account, using Mailchimp credentials.

Next, we need to create a workflow automation scenario using graphical no-code web interface of Zapier.

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  Set up a Trigger action for Square

  Choose the following trigger: New Transaction (Triggers when a new transaction is processed.).

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  Then set up an Action for Mailchimp

  Choose this action: Add/Update Subscriber (Add a new subscriber to an audience of your choosing. Can be used to update an existing subscriber too.).

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  Then set up another Action for Square

  Choose this action: New Order (Triggers when a new order is processed.).

Finally, we need to test this automation and publish it.

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  Customize data flow

  Configure the data that is exchanged between Square and Mailchimp.

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  Test the workflow and turn it on for production use

  Test your scenario and publish to production. Now you have an automatic workflow, that will Add or update Mailchimp subscribers from new Square transactions!