2.4 Install Slack app

Now we will create a Slack App with the Slash Command /askfaq so users in your workspace can send input to the API Gateway.

Step 1: Access Slack API Console

1. Go to: https://api.slack.com/apps
2. Click Create New App
3. Choose:
   • From scratch
   • App name: AWSChatbot
   • Workspace: select your workspace

Step 2: Create Slash Command

1. In the app dashboard, select “Slash Commands” > Create New Command

2. Fill in the following information:

Step 3: Grant permissions to the app

1. Select OAuth & Permissions from the left menu
2. In the Scopes section, add:
   • commands
   • chat:write
   • files:read
   • calls:write

Step 4: Enable Event Subscriptions

1. Go to Event Subscriptions
2. In this section, enable Enable Events
3. Enter Request URL: https://<your-api-id>.execute-api.<region>.amazonaws.com/slack (the endpoint from API Gateway you created earlier.)
4. Subscribe to bot events: file_shared
5. Save changes

Step 5: Install the app to your workspace

1. Go to Install App
2. Click Install to Workspace
3. Click Allow

✅ After installation, you will see:

• Bot User OAuth Token
• Verification Token (used to verify requests in Lambda if needed, but we will not use this for now)

Step 6: Test the Slash Command

Open Slack and try typing anything to see if you get a response. At this step, you just need to receive any response. If the API Gateway has an error, Slack will report a Timeout. Everything is set up correctly if you see a result like