Supertokens

SuperTokens is an open-source authentication platform designed for teams that want Auth0/Clerk-comparable developer experience with the option to self-host and own their identity data. The managed cloud option provides the simplicity of Auth-as-a-service while retaining the migration path to self-hosting if needed. For agents integrating with authentication systems, SuperTokens provides clean APIs for session management, user management, and multi-tenancy without the vendor lock-in risk of fully-managed commercial alternatives.

The API and SDK cover authentication flows (email/password, social login, passwordless), session management, user management, and multi-tenancy. The session management API is particularly well-designed — rotating refresh tokens with automatic rotation reduces session theft risk without implementation complexity. Multi-tenant support is available for agents building B2B products that need per-organization auth isolation.

Authentication credentials for SuperTokens consist of the API key and connection URI for managed or self-hosted deployments. The dual setup — API key plus endpoint — means agents need both pieces to connect. Teams self-hosting should protect both components. The managed cloud removes the self-hosted key management concern at the cost of vendor dependency.

Reliability for managed SuperTokens is appropriate for a production auth service. Self-hosted reliability is the team's responsibility, with the same operational considerations as any self-hosted auth infrastructure. Teams switching from commercial auth to SuperTokens should run parallel deployments during migration to validate reliability before cutover.

Documentation is comprehensive and well-organized for the developer-first audience SuperTokens targets. The integration guides for popular frameworks (Next.js, Express, etc.) cover the setup end-to-end, which reduces integration friction. Teams evaluating SuperTokens alongside commercial alternatives will find the documentation quality comparable.