Express

Fern has a first-class integration with Express. Fern automatically generates:

• Typescript interfaces for your API types
• Exceptions that you can throw for non-200 responses
• Interfaces for you to define your business logic.

All the networking/HTTP logic is auto-generated by Fern under the hood.

Repos:

• Fern Definition Registry is an Express server that uses Fern under the hood.
• The Fern Express Starter is a simple example of a Fern-powered Express server.

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Demo video