Setup:

You need to get a personal APIkey before using the API. So only you can send messages to yourself. 

Just follow these simple steps:

  1. Add the phone number +34 644 52 74 88 into your Phone Contacts. (Name it it as you wish)
  2. Send this message "I allow callmebot to send me messages" to the new Contact created (using Signal Messaging of course)
  3. The bot will answer you with your personal apikey.

You can now start sending messages to yourself through Signal Messaging App.

Example of apikey generation:

5. Enjoy

Note: If you phone number is not visible by the Bot (because of your privacy settings), then the Bot will take your UUID (Unique User ID) as your phone number. For example: 25a7d32b-0c51-44d8-b11b-c5bc73294abc.  You can still use the API with the UUID instead of the phone number.