Overview of API Authentication methods
API authentication verifies a client's identity before granting access to endpoints. Common methods include:
- API Key: A unique key typically passed in request headers (e.g.,
Authorization: API_KEY). - OAuth 2.0: A token-based framework for third-party authentication and delegated permissions.
- Bearer Token: Access tokens used in headers (e.g.,
Authorization: Bearer TOKEN), common in web and mobile apps. - HMAC (Hash-based Message Authentication Code): Uses cryptographic hashing to ensure request integrity and authenticity.
- Certificate-Based: Uses SSL/TLS certificates for mutual authentication, typically in enterprise environments.