# Broadcast WhatsApp Message Templates with Flow Builder & Postman

In this guide, you will learn how to broadcast any WhatsApp Messages Template with [Flow Builder](https://dashboard.messagebird.com/en/flow-builder) by creating a flow using a webhook as a trigger and [Postman](https://www.postman.com/downloads/) to trigger the webhooks.

* [Before you begin](#h_01F4VAAMRAVHAEJ0AAH8H11NAV)
* [Step 1: Create a webhook trigger flow ](#h_01F4VAAS2138EA082CRS91EBDE)
* [Step 2: Create a CSV list ](#h_01F4VAAXBGT4ET89E046X6C4Y8)
* [Step 3: Import contacts.csv into Postman](#h_01F4VAB29R19D5DC0H8W7ZKFF5)

### Before you begin <a href="#h_01f4vaamravhaej0aah8h11nav" id="h_01f4vaamravhaej0aah8h11nav"></a>

Before you get started, you will need to complete the following 3 steps first:&#x20;

* Create a business account by signing up with [MessageBird - WhatsApp Business Plan](https://www.messagebird.com/whatsapp/).&#x20;
* Submit your [pre-approved Message Templates](/connectivity-platform/getting-started/working-with-whatsapp-message-templates.md) via the [WhatsApp Template Manager](https://dashboard.messagebird.com/en/whatsapp-template-manager/) in your MessageBird Dashboard. You can use the following example as a guide:

E.g. *Hi **{{1}}**,*

*This is an automated system that helps facilitate your registration process through WhatsApp. Visit this link to find out what documents you need before we get started:* [*https://www.messagebird.com/en/*](https://www.messagebird.com/en/)

*Reply with Start when you're ready to proceed.*

* Install [Postman](https://www.postman.com/downloads/).&#x20;

&#x20;

<figure><img src="/files/PPjwFigUrE5dfFqnfkcy" alt=""><figcaption></figcaption></figure>

\ <br>

### Step 1: Create a webhook trigger flow  <a href="#h_01f4vaas2138ea082crs91ebde" id="h_01f4vaas2138ea082crs91ebde"></a>

1\. Go to [Flow Builder](https://dashboard.messagebird.com/en/flow-builder) and **create a new flow**.&#x20;

2\. Select **Webhook** as the trigger.

<figure><img src="/files/npBNGj7iSVKGFgU6LfP7" alt=""><figcaption></figcaption></figure>

&#x20;

3\. Add **phone** and **firstname** as your **webhook variables**.

<figure><img src="/files/1I0lV7cc7yJPvlbSHmAl" alt=""><figcaption></figcaption></figure>

\ <br>

4\. Done? Awesome! Add a **Send WhatsApp HSM** step below your Webhook.  Choose your template, add **phone** as the **Recipient**, and **firstname** as **variable 1**.

<figure><img src="/files/HS6Zb1EePf3NcutLASyH" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/VApWaCK1c8J30DtHXujS" alt=""><figcaption></figcaption></figure>

\ <br>

**5. Publish** your flow in the top-right corner of your screen, and you're good to go!&#x20;

&#x20;

### Step 2: Create a CSV list  <a href="#h_01f4vaaxbgt4et89e046x6c4y8" id="h_01f4vaaxbgt4et89e046x6c4y8"></a>

&#x20;1\. Create an excel or Google form. If you have an existing contact list, please update it like the following: &#x20;

<figure><img src="/files/M3G0KL9BHcC20lKHSpMx" alt=""><figcaption></figcaption></figure>

\ <br>

Make sure the phone number starts with the country code.

2\. Save your file as **contacts.csv** when you are done. Don’t forget to save your file as a CSV format.&#x20;

&#x20;

### Step 3: Import contacts.csv into Postman <a href="#h_01f4vab29r19d5dc0h8w7zkff5" id="h_01f4vab29r19d5dc0h8w7zkff5"></a>

1\. Open your flow, click on the **Webhook** step and tap **copy.** Paste the **Flow Builder Webhook URL** into the request URL in **Postman**. The **HTTP Request Method** can be **GET** or **POST**.

&#x20;

<figure><img src="/files/flhC6R2axxXQL6zOxEjn" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/afQf3PhGcKHVPG7bg9Rl" alt=""><figcaption></figcaption></figure>

\ <br>

2\. Copy **phone** and **firstname** from the **Configure webhook variables** section into **Query Params** as **KEY** values:&#x20;

* Type {{phone}} in the **phone** VALUE field&#x20;
* Type {{firstname}} in the **firstname** VALUE field.

<figure><img src="/files/EbYQTLCZeTwPQyTEMTmo" alt=""><figcaption></figcaption></figure>

&#x20;

<figure><img src="/files/3psZp5Z62GXntvoS4Nrm" alt=""><figcaption></figcaption></figure>

\
3\. Press **Save**. A **SAVE REQUEST** window will pop up, tap **+ Create Collection** and name it **WA Broadcast**. Once the new collection is created, save your request by clicking on the **Save to WA Broadcast** button.

<figure><img src="/files/R82PmFQeykQwQQ6aOtcP" alt=""><figcaption></figcaption></figure>

<br>

&#x20;

<figure><img src="/files/8gq9lMyvUne1LqEOeom5" alt=""><figcaption></figcaption></figure>

\ <br>

4\. Choose **Runner** from the top row. A **Collection Runner** window will pop up, select your **WA Broadcast** collection — the saved request will populate into the **RUN ORDER**.<br>

<figure><img src="/files/HixX0HzlbyTpVClbVbB9" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/wdU8m46LRGtPGFhLF7EK" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/tpFFXcJRxUIhOafDWh9B" alt=""><figcaption></figcaption></figure>

\ <br>

5\. Click **Select File** and open **contacts.csv**.

<figure><img src="/files/Md0V0CQIjW8g5Q2Q6hez" alt=""><figcaption></figcaption></figure>

\ <br>

6\. Click the **RUN WA Broadcast** button. **Runner** will then send the webhook request to the webhook flow following from the 1st row until the last row of the **contacts.csv** file.

&#x20;

#### Status:

* Passed: A green flag and **204 No Content**.
* Failed: A red flag and **400 Bad request**. If that’s the case, please make sure you did not miss any previous steps. &#x20;

  <figure><img src="/files/bKNSbbxghCdn9uWODz4i" alt=""><figcaption></figcaption></figure>

And that’s it! 🎉Now you know how to broadcast any WhatsApp Message Templates through [Flow Builder](https://dashboard.messagebird.com/en/flow-builder) using [Postman](https://www.postman.com/downloads/).&#x20;


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