Understanding the Three Telegram APIs
Confusion often arises when developers conflate the distinct interfaces provided by Telegram. As of 2026, the platform offers three primary API types: the Bot API, the MTProto API (via TDLib), and the Gateway API. Each serves a specific purpose, and selecting the wrong one can lead to significant development delays. The Bot API is an HTTPS interface designed specifically for bot accounts, making it the standard choice for sending posts, alerts, and media to channels or groups. In contrast, the MTProto API allows applications to act as user accounts, requiring phone number login and handling complex encryption protocols directly. The Gateway API is a niche service that delivers verification codes via Telegram instead of SMS, charging a small fee per delivered code.
Choosing the Right Tool for Automation
For most automation tasks, such as posting news updates or managing chatbots, the Bot API is the recommended path. It simplifies the process by using plain HTTPS and JSON, with Telegram’s servers handling the underlying MTProto encryption. This approach is ideal for developers who need to send content to users who have started the bot. However, if your project requires acting as a human user—such as reading private history or interacting with non-bot accounts—you must use the MTProto API. This requires obtaining an api_id and api_hash from my.telegram.org, in addition to a phone number login. It is crucial to note that using unofficial clients for flooding or spamming can result in permanent account bans, and the terms of service explicitly forbid using Telegram data to train AI models.
Creating Your Bot and Obtaining Credentials
The process of creating a bot begins with @BotFather, the official tool for managing bot accounts. Users must send the /newbot command to initiate the creation process. You will be asked to choose a display name and a unique username, which must end in bot. Once created, BotFather provides a unique token, which serves as the primary authentication key for your bot. This token should be treated with the same security as a password, as anyone with access to it can control your bot. If a token is compromised, it can be regenerated immediately via the /token command, invalidating the previous one. To verify the token, developers can call the getMe method, which returns the bot’s basic information in JSON format.
Every Bot API call is https://api.telegram.org/bot<token>/METHOD_NAME, with GET or POST, and parameters as a query string, form fields, JSON, or multipart form data.
Sending Messages and Media
Interacting with the Bot API is straightforward. Every request is sent to a specific endpoint using the bot token. For text messages, the sendMessage method is used, accepting parameters such as chat_id and text. The chat_id can be a numeric ID or a public channel username prefixed with an at sign. For media, specific methods like sendPhoto, sendVideo, and sendDocument are available. These methods support file uploads via multipart form data, with size limits varying by file type. For example, photos are limited to 10 MB, while videos can be up to 50 MB through the public Bot API. Developers can also send media groups, allowing multiple files to be posted as a single album, which is useful for visual content.
Handling Group Privacy and Admin Rights
When adding a bot to a group, it is important to understand the default privacy mode. By default, bots in privacy mode only receive commands and direct replies, not all group messages. This limitation affects what the bot can process but does not prevent it from posting. To grant a bot full visibility of all messages in a group, it must be added as an administrator. This distinction is critical for bots designed to monitor or moderate group conversations.
Best Practices and Future Developments
The Bot API is actively maintained, with the current version being 10.3, released in August 2026. Developers should regularly check the recent changes log to ensure their applications remain compatible with the latest features. While older tutorials may still cover basic functionality, newer versions introduce enhancements that can improve performance and user experience. For complex interactive bots, libraries such as python-telegram-bot are widely used, offering asynchronous handling and robust command management. As automation tools continue to evolve, staying updated with these changes is essential for building reliable and efficient Telegram integrations.