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  • Optum (formerly, Change Healthcare) provides REST APIs with resource-based URLs
  • Our APIs are only accessible through HTTPS
  • Request bodies and responses are JSON encoded
  • Our API requests are protected by OAuth2 Bearer authorization token to obtain access
  • Base URL:

Our interactive Try It feature demonstrates our APIs using curl to interact over HTTPS. Select one of the languages to explore the examples, such as this.

Use our sandbox to test and familiarize yourself with our APIs.



DO NOT perform load testing or production data testing in the sandbox environment. Please use the sandbox ONLY to view sample API responses to HTTP requests using our predefined values and to familiarize yourself with our APIs.

To perform load testing and production data testing, we recommend using our APIs in production environment.

See Also