Hello Nicholas,
The validate address endpoint allows you to validate whether a given address is valid as a Stuart pickup or dropoff address, the response is either success of failure. This endpoint checks whether the address is real, accurate enough and within the Stuart picking or delivery zones.
When creating the job, the address is geocoded which may cause it to change if it the address string you provided was not originally a google geocoded address. To prevent this from happening we recommend that you use a Google autocomplete field for your customer address to ensure the format you send us will be valid and recognised 100% of the time. Please refer to our address best practices post for more information.
It would be great to meet and discuss your integration with our team so that we can find out more about your project and answer any questions you have. Please see the related post Starting my Integration for more information.