A: if you are using our API for sending messages or setting up automations, then yes you have to use your API Key. But you can also send/schedule messages through simple excel upload if you dont want to use API - https://youtu.be/0MpR71urCiY?feature=shared

Here is a documentation on how to use API for sending messages, which also mentions from where you can find your API key - https://wbiztool.com/docs/send-message-api/

Automations -
https://youtu.be/RA_UKbJFruE?feature=shared