Independent server-side SDKs for Python, Node.js/TypeScript, PHP, .NET, Go, Rust and Ruby. Integrate username lookup, wallet balance, Telegram Stars and Premium gifting through one documented contract. Typed errors handle 429/Retry-After; exact balance strings preserve precision; purchases never auto-retry. Includes EN/RU/UZ docs and synthetic tests. Not official Telegram, Fragment or TON software. Purchase requests transmit wallet mnemonic and Fragment session/cookie data to the API operator.