# Fern (https://devrel.directory/directory/fern)

Generates SDKs and a docs site from an OpenAPI spec, so a small team can ship a full developer portal.

From one API definition it generates idiomatic SDKs in the major languages plus a hosted docs site with an interactive API explorer. Docs live in your repo and publish through CI, keeping reference, guides, and client libraries in lockstep with the spec. Now part of Postman, it suits API companies that want a complete developer portal without stitching together separate vendors.

- Category: Tools
- Website: https://buildwithfern.com
- Repository: https://github.com/fern-api/fern
- Docs: https://buildwithfern.com/learn
- Repository activity (checked 2026-08-01): 3.7k stars, last commit 2026-07, last release 2026-05
- llms.txt: https://buildwithfern.com/llms.txt
- Agent-readiness grade: B (57/100, machine-checked signals: serves an llms.txt; documentation entry point; public source repository; repository actively maintained; pricing stated and dated; link verified recently)
- Pricing model (read 2026-07-26): open-core
- Tags: api, sdk, docs
- Added: 2026-07-12
- Last verified: 2026-08-01