# Ogen

**Canonical:** https://apis.io/providers/ogen/  
**Website:** https://ogen.dev  
**APIs profiled:** 1

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.

## Kin Score — 33.1 / 100 (thin)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (-0.7 from 33.8).

| Facet | Score |
|---|---|
| Discoverability | 59.3 |
| Contract Quality | 8.0 |
| Governance | 33.3 |
| Contract Governance | 33.3 |
| Operational Transparency | 36.8 |
| Developer Ergonomics | 66.1 |
| Commercial Clarity | 15.8 |
| Access Clarity | 15.8 |

## Agent readiness — 3.4 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Open Source (Apache-2.0) — onboarding: unknown, pricing: unknown, trial: no (confidence: high).

## APIs (1)

- **Ogen** — 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, ro...

## Security (2)

- **Ogen Domain Security** — TLSv1.3
- **Ogen Vulnerability Disclosure** — security.txt

## Plans (1)

- **Ogen Plans Pricing**

## Tags

Code Generation, Go, OpenAPI, SDK, Developer Tools, Open-Source, JSON-Schema, Client Libraries, API Design, OpenTelemetry

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/ogen/). Scores are computed from the provider's own public artifacts under a published rubric.