How to trigger a WhatsApp automation - Simio
This guide explains how to connect Batch to Simio, a WhatsApp messaging platform, using Batch’s Universal Channel feature.
You will create one API-triggered flow in Simio, add your Simio API key into Batch, and finally configure a Universal step that sends the request.
Step 1 — Create an API-triggered automation in Simio
Start in Simio. You need a WhatsApp automation that begins when it receives an API request — this is what Batch will trigger.
What to do
Open Automations in Simio
Create a new automation
Choose API as the trigger
Save your automation
You can write the WhatsApp message now or add it later

This panel also displays the destination URL, API key name, and JSON example you will use later.
Step 2 — Add your Simio API key into Batch
Batch needs your Simio API key to authenticate each time it sends a trigger request.
In Simio
Copy the hidden Value (your actual API key) from the API trigger panel, just below the SIMIO-API-KEY field.

In Batch
Go to Settings → Channels → Universal
Click New Credential Headers
Choose a name (e.g., “SIMIO”)
Key →
SIMIO-API-KEYValue → paste the key from Simio
Save

Note: If you create multiple automations in Simio, they will all use the same API key. You only need to add the credential once in Batch.
Step 3 — Configure the Universal step in Batch
In this step, you will add the Universal step in your Batch automation and configure it to trigger the Simio automation you created in Step 1.
Add the Universal Step
Open the Batch automation where you want to trigger WhatsApp
Click the + button
Select Universal
This opens the Universal step configuration screen.

Configure the Simio request
Fill in the fields using the information from Simio:
1. Destination URL
Paste the URL shown in Simio’s API trigger (example: https://app.getsimio.com/api/campaign/9753)
3. Headers
Choose the credential header you created earlier (e.g., SIMIO)
4. JSON Body
Start with the phone number:
{
"phone": "{{b.phone_number}}"
}
Step 4 — Test the connection
Once your Universal Step is configured, you can test it directly from Batch to make sure everything is working properly.
How to test
In the Universal Step, click Test API.
If your JSON body includes personalization (e.g.,
{{b.phone_number}}), choose a test profile so Batch can fill in real data.Click to send the test request.

What the test does
Batch performs the exact same API call it will make when the automation is live.
Simio receives the request and triggers the corresponding WhatsApp automation for the selected profile.
What Batch validates
Batch will display whether the request was successfully delivered to Simio or if something needs fixing (e.g., wrong URL, missing key, invalid JSON).
Note: Batch can only confirm that the trigger was correctly called. It does not have visibility on what happens inside Simio afterward (e.g., whether the message was sent or failed).
Step 5 — Activate your Batch automation
When the test is successful, you can turn your Batch automation live.
To activate
Review your workflow, including the Universal step.
Run your automation
Once live
Every time a profile moves through this step in your automation, Batch will send the API request to Simio.
Simio will then run the WhatsApp automation linked to the URL you configured.
Additional Universal steps
If you want to trigger multiple WhatsApp scenarios (e.g., a follow-up message, or different Simio automations), you can add more Universal Steps within the same Batch automation or in a new one by following these steps again (Step 2 can be skipped).
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