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Val Town is a collaborative website to build and scale JavaScript apps.
Deploy APIs, crons, & store data – all from the browser, and deployed in milliseconds.
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This Telegram bot uses OpenAI's GPT-4o-mini model via the AI SDK to provide intelligent responses to user messages.
- Responds to text messages using OpenAI's GPT-4o-mini
- Shows typing indicator while generating responses
- Handles errors gracefully
- Concise and friendly AI responses optimized for chat
- Customizable system prompt via markdown file
-
TELEGRAM_TOKEN: Your Telegram bot token
- Get this from @BotFather on Telegram
- Create a new bot with
/newbotcommand - Copy the token provided
-
OPENAI_API_KEY: Your OpenAI API key
- Get this from OpenAI Platform
- Create a new API key
- Make sure you have credits in your OpenAI account
/start- Welcome message and bot introduction- Any text message - Gets an AI-generated response
The bot's personality and behavior can be customized by editing the system-prompt.md file. This markdown file contains:
- The main system prompt that defines the AI's role and behavior
- Guidelines for response style and tone
- Instructions for handling specific scenarios
Simply edit the markdown file and redeploy to update the bot's behavior. The bot will fail to start if the system prompt file cannot be loaded, ensuring you always know when there's an issue with your configuration.
- Uses Grammy framework for Telegram bot functionality
- Integrates AI SDK with OpenAI provider
- Configured to use GPT-4o-mini model (cost-effective and fast)
- Maximum response length: 500 tokens
- System prompt loaded from
system-prompt.mdfile for easy customization
- Validates required environment variables on startup
- Validates system prompt file exists on startup
- Handles API errors gracefully with user-friendly messages
- Logs errors for debugging
- Only responds to text messages (ignores media, stickers, etc.)
- Set up the required environment variables in Val Town
- Customize the system prompt by editing
system-prompt.md - Deploy the val as an HTTP endpoint
- Start chatting with your bot on Telegram!
The bot will automatically set up the webhook when it receives its first request.