Hi Wesley, and welcome to the community!
Here's a post with a lot of documentation:
Here are few interesting links (that may narrow your search) from that post also:
https://docs.particle.io/tutorials/device-cloud/console/#asset-tracker-features
https://docs.particle.io/reference/device-cloud/api/#asset-tracking-events
https://docs.particle.io/reference/device-cloud/api/#asset-tracking
For sending info to your own API you could use webhooks. Perhaps, I'm not 100% sure.
https://docs.particle.io/reference/device-cloud/webhooks/
Please keep the questions coming!
Gustavo.