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Tech riderRev. 4 Oct 2026

oapi-codegen

Ch 176.7of 33 Code Generators
  1. 1Runs onLinux, self-hosted
  2. 2CostsFree plan
  3. 3Custom templatesYes
  4. 4Schema-to-code generationYes
  5. 5CLI availableYes
  6. 6Supported languagesGo
6 lines stated Written from the maker's own pages: github.com
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Overview

oapi-codegen is ranked #17 of 33 in code generators on Specifiction. It runs on Linux, Self-hosted. There is a free plan.

oapi-codegen plans and pricing

All plans
Open source Free OpenAPI-to-Go code generation; Go 1.25+ required to build and install github.com · 4 Oct 2026

Compared on code generators

Custom templates
Yesgithub.com
Schema-to-code generation
Yesgithub.com
CLI available
Yesgithub.com
Supported languages
Gogithub.com

Facts

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

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