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OpenAPI Generator

Generates clients and servers from an OpenAPI specification.

CLIOpen source
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Generates client SDKs, server stubs and documentation in dozens of languages from an OpenAPI file.

When to use

When the API has an OpenAPI contract and several clients in different languages.

When to avoid

If the generated code gets heavy or you prefer shared types straight in code (tRPC).

Alternatives

They do a similar job. Compare before choosing.

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