I can't find the word "journey" — I'm disappointed.

A useful product that developers who want some easy SDKs across a bunch of languages use?

I'm guessing it'll be something around spinning up MCPs easily as an evolution of their product. Just right place, right time

Brian Krausz

For what it’s worth Stainless codegen output has always been owned by customers. The SDKs won’t disappear, and the team did spend quite a lot of time to make it possible to transition to self-service. I don’t see how that could be used against you

I think that's the normal path for new markets as they consolidate...

I don’t really see where the “walled garden” complaint is coming from. Anthropic spends a lot of effort to keep you from churning through trillions of tokens on their flat-rate subscription plan, but that’s a billing detail, and one that I honestly don’t share the outrage about. The technology part of CC is still totally open: skills, MCP, etc. are all open informal standards and there hasn’t been any movement to lock that down.

This is the whole point and the reason for the lofty valuations. Get everyone to shift their work to be dependent on these tooling, to the point they can't imagine working in any other way, and then raise prices. Tale as old as enterprise software.

That was always going to be the end point.

The amount of money thrown at it means at some point the words Return on Investment were going to appear.

It’s the classic loss leader applied to trillion dollar (across the market) capital investments.

Frontier AI labs is pivoting to something that can justified their IPO. just like OpenAI shut down other services and pivot more into coding. They want to show profitability before their mega IPO.

Third sentence in the article:

> Founded in 2022, Stainless has powered the generation of every official Anthropic SDK since the earliest days of our API.

edit: bah. no more HN before coffee.

I guess they'll be able to vibecode a replacement pretty quickly

I hope they make it open source!

"Hundreds of companies rely on Stainless to generate SDKs, CLIs, and MCP servers—the libraries, command-line tools, and connectors that let developers and agents use an API."

not anymore lol

FYI the above quote is (sadly) real and is from Stainless's blog post: https://www.stainless.com/blog/stainless-is-joining-anthropi...

Surely part of the value is the talent, the rest comes from removing a tool like this from the open market? I wonder how much of each went into the final valuation

You guys should be proud - it was a great service!

stainless is a great piece of software. it was a really good risk to try to make a business out of openapi generators' maintainers not having enough time to fix bugs. everybody benefits. it sounds like nothing but similar ideas - like uv - save me time every day and turn me into an evangelist.

I met him via HN, and somehow got the opportunity to work closely with him on Stainless since the very early days, I can confirm he is awesome! He did such a fantastic work building the team and developing a very unique culture of excellence and kindness

The OpenAPI autogenerated clients kinda suck though.

My preferred approach for doing this is to have a hand-rolled SDK generator that reads the request, response and error models out of the microservice project and emits the same in each language targeted by the SDK, along with a minimal stub that calls the API.

You then spend 15 minutes at most, customizing the stub if needed, if you need custom behaviours like streaming.

Via https://www.stainless.com/blog/stainless-is-joining-anthropi... that's exactly what seems to have happened:

> As we focus on Claude Platform capabilities and connecting agents to APIs, we’ll be winding down all hosted Stainless products, including our SDK generator. Starting today, new signups, projects, and SDKs will not be available.

> If you’re a Stainless customer, visit app.stainless.com/transition for help transitioning from Stainless-managed products to other options. As always, you own the SDKs you’ve generated to date, and have full rights to modify and extend them however you wish.

If you have an account you can go to https://app.stainless.com/transition. The team spent a good amount of time working on a way for customers to switch to self-service