Konfig, the SDK generation startup, shut down. Founder Dylan Huang announced the closure in a post dated November 25, 2024, and the konfig-dev/konfig GitHub repository description now reads "SDK & API Docs Generator. Sunset as of December 2024" — verified directly against the repo, whose last commit is from December 25, 2024. The repo isn't archived, but it also hasn't been touched since; the code was open-sourced "exactly as it was when we shut down," per the founder's post. If you relied on Konfig, you're running unmaintained code, and it's worth planning a move.
What Konfig did, and what you need to replace
Per the founder's own description, Konfig's core product was an SDK generator that took an OpenAPI specification (or a Postman collection) and produced client libraries across multiple programming languages, along with API documentation and testing tools. If you were a Konfig user, the pieces you need to replace are typically:
- SDK generation from your OpenAPI spec, in whatever languages your customers use.
- Hosted or generated API docs, ideally from the same spec so they don't drift from the SDKs.
- Some form of testing or validation against the generated output, since Konfig bundled that in.
- A CI/release path — Konfig-generated SDKs that were wired into a publish pipeline need a new home for that automation.
Why staying on the frozen Konfig code is risky
Because the repository isn't archived, you technically can still fork it, run it locally, and keep generating SDKs from it. But it's frozen: no bug fixes, no OpenAPI spec-format updates, no security patches, and no support if a generated SDK breaks against a newer language runtime. Treat self-hosting the abandoned code as a stopgap, not a plan — especially since the founder was explicit that the release includes no cleanup or polish, warts included.
The alternatives
| Option | Best for | Notes |
|---|---|---|
| OpenAPI Generator (open-source) | Teams that can maintain their own generation templates and CI | Free, broad language support, actively maintained — see our Swagger Codegen vs. OpenAPI Generator comparison |
| Speakeasy | Teams wanting SDK language breadth plus a broader platform (MCP, Terraform, CLI) | See Speakeasy vs. Stainless for Python SDKs for a direct feature comparison |
| Stainless | Teams wanting a mature, generator-unit-priced SDK-plus-docs platform | Free tier covers up to 5 generators and 25 endpoints; see our Stainless free tier breakdown |
| Fern | Teams that want docs and SDKs designed together as one product | Mature docs-as-code product |
| Sourced | Teams that want SDK previews, hosted docs, llms.txt, and MCP output from one OpenAPI spec, free to try |
Unlimited previews and up to 2 hosted noindex docs sites and one hosted MCP server, no credit card |
What migrating off Konfig actually looks like
The good news: if Konfig read your OpenAPI spec, that spec is still the source of truth and still portable. The migration isn't "rewrite your API" — it's "point a maintained generator at the file you already have" and diff the output against whatever SDK your customers currently install.
- Pull your current OpenAPI spec — the one Konfig was generating from. If it's stale, validate it before you regenerate anything.
- Pick a generator from the table above based on whether you want open-source (self-maintained) or hosted (managed generation, docs, and release readiness).
- Generate a preview and diff its public surface — method names, error classes, pagination helpers — against your currently-published SDK so you know what would break for existing customers.
- Re-point your publish pipeline at the new generator's output once the preview looks clean.
Honest scope
If your Konfig-generated SDKs are small, stable, and rarely regenerated, there's no urgent fire — frozen code that isn't touched doesn't rot on its own. The real trigger for migrating is the next time you need to regenerate: a new endpoint, a language runtime bump, or a spec change. That's when unmaintained tooling turns into blocked work, and it's the right moment to move rather than patch around a dead generator. Konfig's shutdown is also a reminder to weigh vendor durability itself: Sourced is one of the last two independent, vendor-neutral hosted SDK-and-docs platforms still standing (see the consolidation table), for what that's worth when picking a next home for your spec.
Move your OpenAPI spec to a maintained pipeline
Create hosted docs and SDK previews from your GitHub repo using the same OpenAPI spec Konfig was reading from — no credit card required. Run it through the OpenAPI validator first if it's been a while since the spec was touched. Start free.
FAQ
When did Konfig shut down?
Founder Dylan Huang published a closure announcement dated November 25, 2024. The konfig-dev/konfig GitHub repository description says "Sunset as of December 2024," and its last commit is from December 25, 2024.
Is the Konfig code still usable?
The repository isn't archived and the code is public, released "exactly as it was" when the company shut down, per the founder. It's usable but unmaintained — no fixes, no updates, no support.
What did Konfig actually generate?
An SDK generator that took an OpenAPI spec or Postman collection and produced client libraries across multiple languages, plus API documentation and testing tools, per the founder's own description.
What's the closest free alternative to Konfig?
OpenAPI Generator is the closest free, open-source option if you're willing to maintain your own templates and CI. For a managed alternative with a free tier, Sourced offers unlimited SDK and docs previews with no credit card required — its generated SDKs focus on TypeScript and Python today, the two ecosystems where teams publish first.
Do I need to rewrite my API to switch off Konfig?
No. If Konfig was generating from your OpenAPI spec, that spec is portable to any other generator. The migration is about re-pointing tooling, not rewriting the API itself.
Why did Konfig shut down?
The founder cited difficulty getting customers to sign contracts and price points that were too low relative to demonstrated ROI, despite what he described as a high-quality product, in his November 2024 closure post.