oapi-codegen

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On the record

Compatibility limits

Only the latest minor release receives active development support, bug fixes are not backported, and some imported package internals and template overrides are described as unstable.github.com · read 4 Oct 2026

Configuration

The tool uses YAML configuration and provides a JSON Schema for editor suggestions; its command-line interface and configuration format are classed as stable.github.com · read 4 Oct 2026

Customization

Generated Go templates can be overridden, and supported OpenAPI extensions can customize generated types, names, JSON behavior, and struct tags.github.com · read 4 Oct 2026

Generated clients

Generated clients can use a custom HTTP client and can return either a raw HTTP response or parsed response data.github.com · read 4 Oct 2026

Integrations

It can be installed as a Go tool or binary and used with go:generate; the project also documents Renovate for updating a pinned configuration schema.github.com · read 4 Oct 2026

Large specifications

The tool can split large OpenAPI specifications across multiple Go packages using import mapping or external references.github.com · read 4 Oct 2026

OpenAPI support

It supports OpenAPI 3.0 and 3.1, including 3.1 webhooks and nullable type forms; it does not support OpenAPI 2.0 (Swagger).github.com · read 4 Oct 2026

Purpose

oapi-codegen is a command-line tool and library that converts OpenAPI specifications into Go server implementations, API clients, and HTTP models.github.com · read 4 Oct 2026

Requirements

Building and installing oapi-codegen requires Go 1.25 or newer; generated code can have lower Go version requirements depending on the server backend.github.com · read 4 Oct 2026

Security

The project links to an organizational security policy and says it may make breaking changes if needed to respond to a security vulnerability.github.com · read 4 Oct 2026

Server generation

It generates server boilerplate for Chi, Echo, Echo v5, Fiber, Fiber v3, Gin, gorilla/mux, Iris, and net/http.github.com · read 4 Oct 2026

Strict server

Strict server generation supports multiple request and response media types and status codes, form requests, automatic marshaling, and response status and content-type handling.github.com · read 4 Oct 2026

Support

The maintainers describe support as best-efforts because they work on the project during off hours from their jobs.github.com · read 4 Oct 2026

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