Introduction
OAuth grant types are methods that allow different authorization flows in OAuth 2.0. Understanding these grant types helps developers secure API integrations effectively.
Authorization Code Grant
This is the most common OAuth 2.0 grant type. It is used for server-side applications where source code and client secrets can be protected.
Client Credentials Grant
Used by server-to-server applications, this grant type allows applications to authenticate themselves instead of users, making it suitable for service accounts.
Implicit Grant
Primarily used in user-agent-based applications where tokens are issued directly to the client rather than the server. It eliminates the need for an authorization code.
Resource Owner Password Credentials Grant
This grant type is suitable when a high degree of trust exists between the resource owner and the client. The user provides credentials directly to the client, which exchanges them for tokens.
Refresh Token Grant
Enables an application to obtain a new access token when the current token becomes invalid or expires, improving user experience by reducing the frequency of login prompts.
Conclusion
Different OAuth grant types serve different scenarios and application needs. Understanding when and where to use each type ensures secure and seamless API integrations for developers.
View the original article here: https://blog.axway.com/learning-center/digital-security/keys-oauth/oauth-grant-types
