See how you can extend the OAuth 2 flow in Docusign Extension Apps to integrate with non-OAuth system, or build custom onboarding flows.

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Docusign Extension Apps typically use OAuth 2 for authentication, but many external systems don't support it. This guide demonstrates how to extend the OAuth 2 flow by creating custom authorization and token endpoints that act as a bridge between Docusign and non-OAuth systems. The approach involves capturing user credentials through a custom form, encoding them in JWT tokens, and storing them securely on Docusign's side while maintaining the Extension App as a stateless proxy. The implementation uses Next.js to handle both frontend forms and backend API endpoints.

Advanced Authentication and Onboarding Workflows with Docusign Extension Apps

Extending the OAuth 2 Flow in Extension Apps