Signal Cli Android

signal-cli (formerly textsecure-cli) provides a commandline and dbus interface for WhisperSystems/libsignal-service-java


signal-cli is a commandline interface for libsignal-service-java. It supports registering, verifying, sending and receiving messages. To be able to link to an existing Signal-Android/signal-cli instance, signal-cli uses a patched libsignal-service-java, because libsignal-service-java does not yet support provisioning as a slave device. For registering you need a phone number where you can receive SMS or incoming calls. signal-cli is primarily intended to be used on servers to notify admins of important events. For this use-case, it has a dbus interface, that can be used to send messages from any programming language that has dbus bindings.


You can build signal-cli yourself, or use the provided binary files, which should work on Linux, macOS and Windows. For Arch Linux there is also a package in AUR. You need to have at least JRE 7 installed, to run signal-cli.

Install system-wide on Linux

See latest version.

export VERSION=<latest version, format "x.y.z">
sudo tar xf signal-cli-"${VERSION}".tar.gz -C /opt
sudo ln -sf /opt/signal-cli-"${VERSION}"/bin/signal-cli /usr/local/bin/


Important: The USERNAME (your phone number) must include the country calling code, i.e. the number must start with a "+" sign. (See Wikipedia for a list of all country codes.

  • Register a number (with SMS verification)

      signal-cli -u USERNAME register
  • Verify the number using the code received via SMS or voice

      signal-cli -u USERNAME verify CODE
  • Send a message

      signal-cli -u USERNAME send -m "This is a message" RECIPIENT
  • Pipe the message content from another process.

      uname -a | signal-cli -u USERNAME send RECIPIENT
  • Receive messages

      signal-cli -u USERNAME receive

For more information read the man page and the wiki.


The password and cryptographic keys are created when registering and stored in the current users home directory:


For legacy users, the old config directory is used as a fallback:



This project uses Gradle for building and maintaining dependencies. If you have a recent gradle version installed, you can replace ./gradlew with gradle in the following steps.

  1. Checkout the source somewhere on your filesystem with

     git clone
  2. Execute Gradle:

     ./gradlew build
  3. Create shell wrapper in build/install/signal-cli/bin:

     ./gradlew installDist
  4. Create tar file in build/distributions:

     ./gradlew distTar


If you use a version of the Oracle JRE and get an InvalidKeyException you need to enable unlimited strength crypto. See for instructions.


This project uses libsignal-service-java from Open Whisper Systems:


Licensed under the GPLv3: