# Integrating your Amazon Lex Bot with Facebook Messenger

## Create a Facebook Application and Facebook Page

On the Facebook developer portal, create a Facebook application and a Facebook page.

Write down the following:

- The App Secret for the Facebook App
- The Page Access Token for the Facebook page

## Integrate Facebook Messenger with the Amazon Lex Bot 

After you complete this step, the console provides a callback URL. Write down this URL.

1. - Sign in to the AWS Management Console and open the Amazon Lex console at https://console.aws.amazon.com/lex/

    - Choose your Amazon Lex bot.

    - Choose **Channels**.

    - Choose **Facebook** under **Chatbots**. The console displays the Facebook integration page.

    - On the Facebook integration page, do the following:
        + Type the following name: CloudBankFacebookAssociation.
        + For **KMS key**, choose **aws/lex**.
        + For **Alias**, choose the bot alias (**prod**).
        + For **Verify token**, type a token. This can be any string you choose (for example, CloudBankToken). You use this token later in the Facebook developer portal when you set up the webhook.
        + For **Page access token**, type the token that you obtained when created the Facebook page.
        + For **App secret key**, type the key that you obtained when created the Facebook app.
        + Choose **Activate**.

        The console creates the bot channel association and returns a callback URL. Write down this URL

2. On the Facebook developer portal, choose your app.

3. On the left menu click (**+**), add the **Messenger** product, and choose **Add callbak URL** in the **Webhooks** section of the page.

4. On the popup page, do the following:

    + For **Callback URL**, type the callback URL provided in the Amazon Lex console earlier in the procedure.

    + For **Verify Token**, type the same token that you used in Amazon Lex.

    + Choose **Verify and Save**. This initiates a handshake between Facebook and Amazon Lex.

5. Click **Add suscription** buttons, check **messages**, **messaging_postbacks**, and **messaging_optins** and click **Save**

6. You can now start a conversation from Facebook Messenger with your Amazon Lex bot. Open your Facebook page, and choose Message.

You are now ready to go to step 5: [Using the solution](../05_UserGuide/README.md)