Using mtcute

using mtcute

Core Rule

Treat mtcute as a TypeScript MTProto library, not a Bot API wrapper. Prefer high-level TelegramClient methods first, then raw TL .call() only when there is no high-level method.

Use the platform package for the target runtime:

import { TelegramClient } from '@mtcute/node'

Do not import TelegramClient from @mtcute/core in normal apps; platform packages preconfigure runtime crypto, storage, transport, and file helpers.

Workflow

1. Identify the runtime and install/import the right package:
   • Node.js: @mtcute/node
   • Bun: @mtcute/bun
   • Deno: jsr:@mtcute/deno
   • Browser: @mtcute/web
   • Update routing: add @mtcute/dispatcher
   • PostgreSQL storage: add @mtcute/postgres and pg or PGlite
2. Search the current project before writing code. Reuse existing client construction, storage names, dispatcher setup, env handling, and logging patterns.
3. Use the bundled lookup scripts in this skill directory to inspect the installed/generated API when method names, options, or TL types are uncertain.
4. Read only the relevant reference file:
   • references/app-patterns.md for clients, auth, storage, updates, dispatcher, errors, and common implementation patterns.
   • references/api-lookup.md for high-level method lookup, raw TL calls, and TypeDoc/reference navigation.
5. Verify with the project’s TypeScript/test commands when code changes are made.

Minimal Bot

import { Dispatcher, filters } from '@mtcute/dispatcher'
import { TelegramClient } from '@mtcute/node'

const tg = new TelegramClient({
  apiId: Number(process.env.API_ID),
  apiHash: process.env.API_HASH!,
  storage: 'bot.session',
})

const dp = Dispatcher.for(tg)

dp.onNewMessage(filters.command('start'), async (msg) => {
  await msg.replyText('Hello from mtcute')
})

await tg.start({ botToken: process.env.BOT_TOKEN })

Method And Type Lookup

Resolve bundled scripts relative to this SKILL.md file, not relative to the user's project. In examples below, replace <skill-dir> with the absolute path to the directory containing this SKILL.md.

node <skill-dir>/scripts/get-method.js sendText
node <skill-dir>/scripts/get-method.js --search forum
node <skill-dir>/scripts/get-class.js Message
node <skill-dir>/scripts/get-constructor.js --with-references messages.sendMessage

Run these commands from the project or app root so the scripts can resolve local node_modules or the mtcute monorepo workspace. Use these scripts before guessing signatures. They read the installed @mtcute/* packages or this monorepo workspace and support fuzzy matching.

Key Practices

• Keep secrets in environment variables: API_ID, API_HASH, BOT_TOKEN, session strings.
• Use persisted storage for real apps. String storage names map to runtime defaults: SQLite in Node/Bun/Deno, IndexedDB in web.
• Pass InputPeerLike values directly to high-level methods: 'me', usernames, marked IDs, User, Chat, Message, or input peers.
• Prefer Chat, User, Message, or .inputPeer over username/phone when a peer object is already available.
• Use @mtcute/dispatcher for bots with update routing, filters, middleware, scenes, state, or callback handling.
• Use html, thtml, or md tagged templates for formatted text instead of manually building entities unless the task requires raw entities.
• Use InputMedia and BotKeyboard builders for media and keyboards.
• For raw TL calls, read node_modules/@mtcute/core/tl/index.d.ts or use get-constructor.js; handle returned Updates with tg.handleClientUpdate(...) when needed.
• Handle tl.RpcError.is(e, 'FLOOD_WAIT_%d') and other RPC errors explicitly when user-facing behavior matters.

Source Material

Local docs are in docs/guide. Hosted docs and API reference:

• Guide: https://mtcute.dev/guide/
• API reference: https://ref.mtcute.dev/
• LLM index: https://mtcute.dev/llms.txt

Prefer local docs in this repository when available because they match the source checkout. Use the hosted TypeDoc reference for exact public API pages or when working outside this repo.