The Ambassador Developer Hub is a great resource that includes comprehensive guides and documentation to help you start working with Ambassador.
How do I use Ambassador's API documentation?
Our API can be used to programmatically integrate with our referral system. All API requests require a username and key to be defined, so you’ll need to have an account with us before being able to successfully make requests. Your API username and key can be found here under "Your Account & Key."
Can I test an API call?
For each method documented, you can test calls utilizing the "Test in the API Explorer" button below the list of parameters.