Matterdelta

April 13, 2026 ยท View on GitHub

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Matterdelta is a Matterbridge API plugin allowing to connect Delta Chat group chats to the various chat services supported by Matterbridge.

Install

pip install matterdelta

Usage

Configure the bot's Delta Chat account:

matterdelta init dcaccount:nine.testrun.org

The bot's display name, avatar and status/signature can also be tweaked:

matterdelta config selfavatar "/path/to/avatar.png"
matterdelta config displayname "Bridge Bot"
matterdelta config selfstatus "Hi, I am a Delta Chat bot"

To run the bot so it starts processing messages:

matterdelta serve

To see all available options run matterdelta --help

Example Configuration

matterbridge.toml

[api]
    [api.deltachat]
    BindAddress="127.0.0.1:4242"
    Token="MATTERBRIDGE_TOKEN"
    Buffer=1000
    RemoteNickFormat="{NICK}"

...

[[gateway]]
name="gateway1"
enable=true

    [[gateway.inout]]
    account="api.deltachat"
    channel="api"

    ...

Add these to your existing Matterbridge config to set up an API instance that Matterdelta can connect to.

config.json

{
  "gateways": [
    {"gateway": "gateway1", "accountId": 1, "chatId": 1234}
  ],
  "api": {
    "url": "http://127.0.0.1:4242",
    "token": "MATTERBRIDGE_TOKEN"
  },
  "quoteFormat": "{MESSAGE} (re @{QUOTENICK}: {QUOTEMESSAGE:.46})"
}

This file should be in Matterdelta's configuration directory, usually ~/.config/matterdelta/ in Linux-based systems.

To get the accountId and chatId of the chat you want to bridge, run the bot and add its address to your Delta Chat group, then send /id in the group, the bot will reply with the account and chat id, then edit the configuration file and restart the bot.