@mastra/core/dist/docs/references/docs-capabilities-channels-telegram.md

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# Telegram

Telegram channels let a Mastra agent receive direct messages, group messages, and bot mentions from Telegram. Mastra handles the agent wiring and webhook route; the Chat SDK Telegram adapter docs cover bot setup, webhook registration, and polling behavior.

## Install the adapter

Install the Telegram adapter from the Chat SDK:

**npm**:

```bash
npm install @chat-adapter/telegram
```

**pnpm**:

```bash
pnpm add @chat-adapter/telegram
```

**Yarn**:

```bash
yarn add @chat-adapter/telegram
```

**Bun**:

```bash
bun add @chat-adapter/telegram
```

## Agent configuration

Add `createTelegramAdapter()` to the agent's `channels.adapters` object:

```typescript
import { Agent } from '@mastra/core/agent'
import { createTelegramAdapter } from '@chat-adapter/telegram'

export const telegramAgent = new Agent({
  id: 'telegram-agent',
  name: 'Telegram Agent',
  instructions: 'Answer questions and help with tasks in Telegram.',
  model: 'openai/gpt-5.6-sol',
  channels: {
    adapters: {
      telegram: createTelegramAdapter(),
    },
  },
})
```

Register the agent on the Mastra instance:

```typescript
import { Mastra } from '@mastra/core'
import { telegramAgent } from './agents/telegram-agent'

export const mastra = new Mastra({
  agents: { telegramAgent },
})
```

## Adapter setup

Follow the [Chat SDK Telegram adapter docs](https://chat-sdk.dev/adapters/official/telegram) for Telegram-specific setup, including BotFather, webhook registration, secret tokens, and polling mode.

The adapter reads Telegram credentials from environment variables such as:

```bash
TELEGRAM_BOT_TOKEN=your-telegram-bot-token
TELEGRAM_WEBHOOK_SECRET_TOKEN=your-webhook-secret-token
TELEGRAM_BOT_USERNAME=your_bot_username
```

## Webhook URL

Mastra generates the Telegram webhook route from the agent ID and adapter key:

```text
/api/agents/telegram-agent/channels/telegram/webhook
```

Use your public Mastra server URL as the base URL:

```text
https://your-app.example.com/api/agents/telegram-agent/channels/telegram/webhook
```

Use this URL anywhere the Telegram adapter docs ask for the webhook URL. Telegram also supports polling mode; follow the Chat SDK adapter docs if you want to use polling for local development.

## Related

- [Channels overview](https://mastra.ai/docs/capabilities/channels/overview)
- [More](https://mastra.ai/docs/capabilities/channels/other-adapters)