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Telegram bot to post messages from a Telegram group to Mastodon.
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Daniele Tricoli 4de8ea7e06 Update README 9 months ago
cmd Don't use a regexp in splitTextAtChunk 9 months ago
.drone.yml Test sub packages 9 months ago
.gitignore Ignore envrc 9 months ago
LICENSE Initial import 9 months ago
README.md Update README 9 months ago
go.mod Rename the project to telegram-group2mastodon 9 months ago
go.sum Switch to github.com/cking/go-mastodon 9 months ago
main.go Rename the project to telegram-group2mastodon 9 months ago



telegram-group2mastodon is a Telegram bot to post messages from a Telegram group to Mastodon. It's written in Go and it is relased under the AGPL3+. Since the bot must be able to read all the messages you should use it only on public groups.


  1. Build the bot (for example if version is v0.1.0 and you are on a unix system):

    cd /tmp; GOPATH=/tmp/go go install noa.mornie.org/eriol/telegram-group2mastodon@v0.1.0

    You will find the binary at /tmp/go/bin/telegram-group2mastodon. You don't need to set GOPATH if you already have it set and you are fine having the bot installed there.

  2. Create your bot using Telegram @BotFather.

  3. The bot uses environment variables as configuration, you have to export the following (except variables with a default) before starting it:

    Variable Meaning Default
    MASTODON_ACCESS_TOKEN Mastodon access token N/A
    MASTODON_SERVER_ADDRESS Mastodon server address N/A
    MASTODON_TOOT_MAX_CHARACTERS Toot max lenght 500
    MASTODON_TOOT_VISIBILITY Default toot visibility unlisted
    TELEGRAM_BOT_TOKEN Telegram bot token N/A
    TELEGRAM_CHAT_ID Telegram alolowed chat id N/A
    TELEGRAM_DEBUG Debug messages from Telegram False

    MASTODON_TOOT_VISIBILITY allowed values are: direct, private, public and unlisted. To get MASTODON_ACCESS_TOKEN see next point.

  4. To get MASTODON_ACCESS_TOKEN use the subcommand authenticate:

    telegram-group2mastodon authenticate

    and follow the istructions.

  5. Launch the bot:

    telegram-group2mastodon run