Ogen

aid: ogen
name: Ogen
description: 'Ogen is an Apache-2.0 OpenAPI v3 code generator for Go, maintained by the ogen-go organization. It reads an
  OpenAPI v3 document at build time and emits a statically typed Go client and server: code-generated JSON encoding with no
  reflection or interface{}, code-generated validators, a static radix router, sum types for oneOf with name, type and value
  discrimination, Opt/Nil/OptNil wrappers instead of pointers, a typed SecuritySource interface, webhook client and server
  generation, Server-Sent Events client generation, and OpenTelemetry tracing and metrics. Behaviour is steered by a YAML
  config file with a published JSON Schema and by a twelve-term registry of x-ogen-* specification extensions. Ogen operates
  no hosted API of its own — it is distributed as a Go module, a pinned go.mod tool dependency, and a distroless container
  image.'
type: Index
deliveryModel:
  model: self-hosted
  license: Apache-2.0
  license_evidence:
    repo: ogen-go/ogen
    spdx: Apache-2.0
    stars: 2144
  open_source: true
  commercial: false
  callable_host: false
  label: Self-hosted open source · you run it yourself
  confidence: medium
  source:
  - repository-license
  generated: '2026-09-25'
  method: derived
accessModel:
  pricing: open-source
  onboarding: self-service
  trial: false
  try_now: true
  public: true
  label: Open Source (Apache-2.0)
  confidence: high
  source:
  - https://github.com/ogen-go/ogen/blob/main/LICENSE
  - https://ogen.dev/docs/intro
  generated: '2026-08-06'
  method: searched
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/ogen.png
x-docs-platform: docusaurus
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-04
tags:
- Code Generation
- Go
- OpenAPI
- SDK
- Developer Tools
- Open Source
- JSON Schema
- Client Library
- API Design
- OpenTelemetry
- SDK Generation
tags_raw:
- Code Generation
- Go
- OpenAPI
- SDKs
- Developer Tools
- Open Source
- JSON Schema
- Client Libraries
- API Design
- OpenTelemetry
- Open-Source
- JSON-Schema
- SDK Generation
url: https://raw.githubusercontent.com/api-evangelist/ogen/refs/heads/main/apis.yml
created: '2026-03-25'
modified: '2026-08-06'
specificationVersion: '0.23'
apis:
- aid: ogen:ogen
  name: Ogen
  description: The ogen code generator. Invoked as a build-time CLI against a local OpenAPI v3 document — `ogen [options]
    <spec>` — it writes a Go package containing a typed client, server, router, validators and JSON codecs. There is no hosted
    endpoint, no authentication and no base URL; the machine-readable contract is the published JSON Schema for the .ogen.yml
    configuration file.
  humanURL: https://ogen.dev
  tags:
  - Code Generation
  - Go
  - OpenAPI
  - SDK
  - Developer Tools
  tags_raw:
  - Code Generation
  - Go
  - OpenAPI
  - SDKs
  - Developer Tools
  properties:
  - type: Documentation
    url: https://ogen.dev/docs/intro
  - type: GettingStarted
    url: https://ogen.dev/docs/intro
  - type: GitHubRepository
    url: https://github.com/ogen-go/ogen
  - type: JSONSchema
    url: json-schema/ogen-config.jsonschema.json
  - type: CLI
    url: cli/ogen-cli.yml
common:
- type: Plans
  url: plans/ogen-plans-pricing.yml
- type: RateLimits
  url: rate-limits/ogen-rate-limits.yml
- type: FinOps
  url: finops/ogen-finops.yml
- type: IssueTracker
  url: https://github.com/ogen-go/ogen/issues
- type: Releases
  url: https://github.com/ogen-go/ogen/releases
- type: ContributionGuide
  url: https://github.com/ogen-go/ogen/blob/main/CONTRIBUTING.md
- type: Website
  url: https://ogen.dev
- type: DeveloperPortal
  url: https://ogen.dev
- type: Documentation
  url: https://ogen.dev/docs/intro
- type: APIReference
  url: https://pkg.go.dev/github.com/ogen-go/ogen
- type: GettingStarted
  url: https://ogen.dev/docs/intro
- type: GitHubOrganization
  url: https://github.com/ogen-go
- type: SourceCode
  url: https://github.com/ogen-go/ogen
- type: License
  url: https://github.com/ogen-go/ogen/blob/main/LICENSE
- type: Support
  url: https://github.com/ogen-go/ogen/discussions
- type: Community
  url: https://t.me/ogen_dev
- type: JSONSchema
  url: json-schema/ogen-config.jsonschema.json
- type: Packages
  url: packages/ogen-packages.yml
- type: SDKs
  url: packages/ogen-packages.yml
- type: CLI
  url: cli/ogen-cli.yml
- type: Sandbox
  url: sandbox/ogen-sandbox.yml
- type: Vocabulary
  url: vocabulary/ogen-extensions.yml
- type: Conformance
  url: conformance/ogen-conformance.yml
- type: ChangeLog
  url: changelog/ogen-changelog.yml
- type: Lifecycle
  url: lifecycle/ogen-lifecycle.yml
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/ogen-llms.txt
- type: VulnerabilityDisclosure
  url: security/ogen-vulnerability-disclosure.yml
- type: Security
  url: https://github.com/ogen-go/ogen/blob/main/SECURITY.md
- type: DomainSecurity
  url: security/ogen-domain-security.yml
- type: UsageTerms
  url: terms/ogen-terms-of-service.yml
- type: DataLicense
  url: data-license/ogen-data-license.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-enrichment:
  date: '2026-08-06'
  status: enriched
  artifacts_added: 14
  pass: local-v1