DigiKey API products have shared principals, including OAuth, TLS, Access Control, Rate Limits, and Status Codes.
Developer Documentation
Developer and Sandbox
Developers register a client application to access DK API Solutions. The Sandbox is meant to be a safe way to test client application development against an API which will provide a valid data response structure..
Organization and Production
To make a production call to DigiKey APIs a developer must create, or be a member of, an organization. An Organization can have one or more members...
OAuth 2.0: 2 Legged Flow
For use with Product Information V4, both Sandbox and Production, follow a basic pattern when making requests to a DigiKey API with the OAuth 2.0 framework.
OAuth 2.0: 3 Legged Flow
All client applications, both Sandbox and Production, follow a basic pattern when making requests to a DigiKey API with the OAuth 2.0 framework.
SDKs and Tools
Digi-Key Github Repository
DigiKey API Client libraries for Java and C#.
DigiKey Postman OAauth2 Collection for Sandbox and Production.
OAuth Third Party Client Libraries
A list of language specific OAuth libraries can be found on the OAuth.net Code page.