Day 20: The "Secret" Handshake

The 25 Days of Auth0 Community Daily Challenge
1

Challenge Task: If your AI Agent needs to talk to an API without a human clicking a login button, which Grant Type should it use? (Hint: It’s the standard for M2M).

Submission Requirement: The Grant Type name + one reason why.

2

Client Credentials Grant is the standard OAuth 2.0 flow for Machine-to-Machine (M2M) authentication, designed for backend-to-backend communication where no user interaction is required.

  • Client Credentials flow requires that your agent is running in a private environment where its source code is not exposed to third parties - so no mobile apps or Single Page Apps (SPAs)

  • In production, it’s good practice to use a credential management mechanism to avoid long-lived credentials (which are vulnerable to compromise).