Mailchimp Transactional - Connection

Mailchimp Transactional – Connection

Estimated reading time: 2 min

Mailchimp Transactional (formerly called Mandrill) is Mailchimp’s add-on service for sending one-to-one, triggered emails through their API rather than marketing campaigns. Typical uses are password reset emails, receipts, booking confirmations, and other system-generated messages that must reach an individual’s inbox quickly.

Unlike Mailchimp’s marketing campaigns, Transactional is designed for developers and platforms. It relies on API calls and webhooks instead of the drag-and-drop campaign editor.

Conditions to use Mailchimp Transactional:

Paid Mailchimp account
Transactional is not included in the free Mailchimp plan. You need a standard Mailchimp account first, and then purchase Transactional Email credits as an add-on.

Transactional API Key
To use these methods in Wiresk, you must generate a Transactional API key (different from the standard Mailchimp marketing API key). This key is scoped specifically to the Transactional service.

Verified sending domain
Mailchimp requires you to verify at least one domain for sending (through DNS records). Without this, you cannot send messages and some endpoints like List Sender Domains will return empty.

Credits balance
Every email sent consumes credits. If your balance runs out, the API will reject send requests. Read-only endpoints (like listing templates, searching messages) will still work without credits, but no send action can happen.

You can create a Mailchimp account here.
For developers, refer to Mailchimp API endpoint documentation.

Connect Mailchimp Transactional Email to Wiresk Copy Link

A connection to your Mailchimp is needed so we can sync it with our platform.

There are two ways to connect your app to Wiresk:

In “My apps” section, where you can manage your connections (select or create your group first to get access to this section, refer to the Group system ).
While building your Flow, you can easily establish a connection to your app directly within the Flow builder. This can be done during the setup of either a Trigger or a Method.

This guide explains how to set up a connection in “My apps” section, which is essentially the same process as creating one on-the-go.

Add Mailchimp Transactional app in Wiresk Copy Link

On your Wiresk’s Dashboard, select your Group.
On the left panel, go to “My apps” and select
Search the app name in the search field or select it in the apps list.

Animated image GIF, showing the step of how to create an app connection. First, select the group then select My Apps tab, and click on the "+ create" button.

On the connection settings panel:

Give a name to your connection, here we will name it “Mailchimp Transactional”.
Select Mailchimp Transactional connection tab.
Enter the Mailchimp Transactional API Key (see how to get the API Key below).
Then, click on “Create” button.

Voila! You have connected Mailchimp Transactional to Wiresk. You can now use this connection in your Flows.

How to get your Mailchimp Transactional API Key Copy Link

Go to your Mailchimp Account here.

Select Automations >Transactional email.
Click on “Launch App” button, you will be redirected to Mailchimp Transactional app (formerly mandrill).

Now, connect to Mandrill Using your Mailchimp account.

On Mandrill (Mailchimp Transactional) interface, go to Settings > Add API Key

A prompted screen shows your API Key, please copy this key and past it in Mailchimp Transactional connection.

Basic understanding of Flow creation Copy Link

Now that your app is linked to Wiresk, you’re ready to start building Flows.

Simple steps to create a Flow ↓

Select your Group, then on the Flow management screen click on “Create Flow”.
On the new screen, name the new Flow.

GIF animated screen of Wiresk, showing the way to create a new Flow.

Add a Trigger that will start your Flow

Flows can be executed by multiple Triggers, depending on the desired workflow. For example, you could use scheduled Triggers with different recurrence rules alongside a Webhook Trigger for immediate, event-driven runs of the Flow. If you choose to “Run Once“, the Flow will execute using only one Trigger and its sample data.

Click on the (+) button to open the Trigger settings side panel.
On the settings side panel, click on the “+ Add” button.

Screenshot of the Wiresk side panel titled “Trigger.” The panel shows a section labeled “All Triggers” with a blue “+ Add” button for inserting a new Trigger.

On the Trigger selection screen, search your app or select it from the list below the screen.

Screenshot of Wiresk Trigger setting screen. Red arrows shows that you can wether search your app in the search or or select it in the list below.

Select your preferred Trigger on the next screen and customize its settings.

As mentioned in “How to connect your app to Wiresk” above, during your Trigger settings, you can create a new connection to your apps at this stage.

Add a Method that will execute a task

The Method will perform a specific task on a particular app or service you’ve connected to Wiresk like get info or send emails.

You can add at least 1 or multiple Methods for complex Flows (a maximum of 255 Methods).

On the Flow builder, select the (+) plus button next the Trigger button.
Search or scroll down to select the app that will perform a task.
Configure the Methods settings, refer to it documentation in our Help Center.

Screenshot of Wiresk Flow Builder with a Flow named “Flow Example.” The canvas shows a Gmail Trigger on the left connected to an empty step placeholder marked with a plus icon in the center. On the right, the panel lists available apps and tools. A search bar is displayed at the top of the panel for filtering apps. Red arrows highlight the empty step placeholder, the search bar, and items in the app list.

Add Wiresk Tools to your Flow

If you want to build a complex Flow, Wiresk offers a selection of tools at your disposal. Refer to Wiresk’s Tools

To add Tools in your Flow, Follow the same step as adding the Methods.

On the Flow builder screen, click on the plus button (+) then just click on the “Tool” tab and select the Tool that you want to add.

Screenshot of Wiresk Flow Builder showing a Gmail Trigger connected to an empty Method placeholder. A red arrow points to the empty step circle with a plus sign where the next action will be added. On the right side, the “Tool” tab is selected in the panel. Another red arrow highlights the “Tool” tab label at the top. A search bar is shown above a list of available tools.

You can refer to “How to Create a Flow” tutorial for more detailed instructions, including step-by-step guidance on mapping and configuration.

Triggers and Methods Settings Copy Link

When you configure a Trigger or Method in Wiresk, the settings panel lets you define how data is collected or sent, and the type of values you enter depends on the field.

Field Type	Description	Example Value
Authentication	Secure access credentials that connect Wiresk to the app.	Wiresk connection, API Key or OAuth Token
Filters or search	Criteria that narrow which records are retrieved.	Search =”QUERY”, Status = “Active” or Type = “Email”
Limits	Maximum number of records to process in one run.	Records number = 100 Page number = 1
Field Mapping	Defines how fields in one step map to another. Can be static or dynamic.	Static: Subject = “Report” Dynamic: Recipient = value from Trigger

Make sure you enter the right values so your Flow works the way you expect and gives the right results. If you need step-by-step details on setting up Mailchimp Transactional, check the Triggers and Methods Settings documentation.

Going further Copy Link

Explore the full Wiresk User Guide to learn more.

Looking for an integration that’s not yet available? Submit a request to our team, we’ll do our best to support your needs.