OAuth2 Mock Server

OAuth2 Mock Server provides a publicly accessible platform for simulating OAuth2 and OIDC authentication flows. Designed as a drop-in replacement for real OAuth2 providers, it enables instant testing of authentication integrations without the need for actual API keys or complex configuration. The tool is intended for developers who require a frictionless way to test authentication processes across various providers.

The service supports multiple well-known OAuth2 and OIDC providers, including Google, Microsoft, GitHub, Facebook, Discord, Slack, and Apple/Generic, each with their specific authorization and token endpoint paths. Its intelligent routing mimics provider-specific behaviors automatically based on the URL path used, thereby closely reflecting the real-world responses of these services. well-known discovery endpoints, JWKS signing, and standard authorization code exchanges, not just the basic or 'happy path' scenarios.

OAuth2 Mock Server is accessed via a public URL, requiring no installation or configuration files; users simply swap the base URL in their environment file to begin testing. It also allows for multi-persona testing, enabling the injection of specific user data such as name and email directly through URL query parameters, which helps simulate different user profiles and test varied authentication scenarios.

The tool is open source and distributed under the MIT License. It is available for use free of charge, making it accessible for individual developers or teams seeking to streamline their authentication testing workflows.