Controlling API Access With the Client Credentials Grant in FusionAuth
This video explains how the client credentials grant works, how to use FusionAuth's entity management to control API access, and how JWT-based permissions let you securely manage service-to-service communication.
📌 Get Started with FusionAuth for free: https://fusionauth.io/docs/get-started
📌 Example Client Credentials Grant: https://fusionauth.io/docs/lifecycle/...
Timestamps:
00:00 – Introduction to Client Credentials Grant
00:17 – License Key Requirements
00:42 – What Are Entities and Entity Types?
01:41 – Setting Up API Entity Types with Permissions
02:57 – Creating Example API Entities (To-Do, Reminder, Email)
04:14 – Defining Grants Between Internal APIs
05:13 – How the Client Credentials Grant Works in FusionAuth
06:20 – Requesting a JWT for Service Authentication
07:26 – Passing the Token to Target APIs
08:19 – Common Permission Mismatch Debugging
09:02 – Viewing and Decoding the JWT
10:45 – Audience, Scopes, and Subject Validation
11:40 – Permission Checks at the API Layer
12:12 – Example: Denied Request Without Proper Scope
12:48 – Benefits of Centralized Permission Management
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