What is API authentication vs API authorization?

Updated May 6, 2026

Short answer

Authentication verifies identity; authorization controls access.

Deep explanation

APIs first validate identity (tokens/keys) then enforce permissions for resources.

Real-world example

Stripe API permissions per endpoint.

Common mistakes

  • Mixing auth logic in one layer.

Follow-up questions

  • What is API key security risk?
  • What is fine-grained auth?

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