Multilingual Voice & Text Telegram Bot with ElevenLabs API and LangChain Agents

This workflow contains community nodes that are only compatible with the self-hosted version of n8n. # Telegram Voice AI Assistant This n8n template creates a **multimodal Telegram bot** that dynamically responds to users: - **Replies with voice** when receiving voice messages (using ElevenLabs API) - **Replies with text** for text-based queries - Supports **custom AI tools** (e.g., crypto APIs, databases, or custom functions) Built with **LangChain Agents**, it can integrate any external API or data source into conversations. ## Key Features **Smart Response Logic** - **Voice Query? → Voice Reply** 1. Transcribes audio via ElevenLabs API 2. Processes with AI (Groq/Gemini) 3. Converts text response to natural speech (ElevenLabs API) - **Text Query? → Text Reply** Bypasses API/API for faster responses **Extensible AI Tools** Add your own tools: - Database lookups - Weather/stock APIs - Custom Python functions - RAG (document retrieval) Supports **multi-step tool chaining** (e.g., Get BTC price → analyze trends → summarize) **Language & Context** - Auto-detects user language (via Telegram's *language_code*) - Maintains **session memory** (remembers conversation history) ## Use Cases - **Voice-first customer support** - **Crypto/analytics assistants** (e.g., What's Ethereum's current gas fee?) - **Multilingual FAQ bots** - **Educational tutors** (voice-interactive learning) ## Requirements - **Telegram Bot Token** - **ElevenLabs API Key** (For S2S) - **Groq API Key** or **Google Gemini API Key** ## Customization Tips - **Change AI personality**: Modify the *systemMessage* in the Voice Assistant node - **Add more models**: Swap Groq/Gemini for OpenAI, Anthropic, etc. - **Extend functionality**: Add RAG (Retrieval-Augmented Generation) for document queries Take this template to create a **Siri-like AI assistant** for Telegram in minutes!