🔗 How to Get a Slack Webhook URL

If you want your GitHub Actions or Python script to automatically send messages to Slack,
you first need to generate a Slack Webhook URL.

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1️⃣ Create a Slack App

1. Go to 👉 https://api.slack.com/apps
2. Click “Create New App” → “From Scratch”

3. Enter the following information:

   • App Name: e.g., Arxiv Daily Bot
   • Workspace: select the workspace you’ll use

4. Click Create App

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2️⃣ Enable Incoming Webhooks

1. In the left sidebar, click “Incoming Webhooks”
2. Toggle “Activate Incoming Webhooks” → ON

3. Scroll down and click “Add New Webhook to Workspace”
4. Choose the channel where you want to post messages (e.g., #arxiv-daily)

5. Click Allow

You’ll now get a URL like this 👇

https://hooks.slack.com/services/T00000000/B00000000/XXXXXXXXXXXXXXXXXXXXXXXX

✅ This is your Slack Webhook URL.
You’ll use it in GitHub Actions or Python code.

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3️⃣ Test Your Webhook with Python

You can quickly test if your Webhook is working —for example, using Colab 👇

import requests

webhook_url = "https://hooks.slack.com/services/T00000000/B00000000/XXXXXXXXXXXXXXXXXXXXXXXX"
message = "recommendation"

response = requests.post(webhook_url, json={"text": message})

if response.status_code == 200:
    print("✅ Message sent successfully")
else:
    print(f"⚠️ Failed to send: {response.status_code}, {response.text}")

If the message appears in your selected Slack channel, you’re all set 🎉