Anthropic Acquires Stainless, SDK Platform Behind Its Official Claude SDKs

businessmergers-acquisitionsaiai-infrastructureai-inference-platforms 2 posts · 2 accounts

Anthropic said it is acquiring Stainless, an SDK and MCP server platform that has powered every Anthropic SDK since the earliest days of the company's API.

Felicis, an investor in Stainless, said the platform has powered every official Claude SDK since day one, highlighting Stainless's role in the developer tooling around Anthropic's AI products.

From the sources (2 posts)

@anthropicai

Anthropic is acquiring @stainlessapi, an SDK and MCP server platform that has powered every Anthropic SDK since the earliest days of our API. Read more:

@felicis

We backed @StainlessAPI because @RattrayAlex believed SDKs deserved the same craft as the APIs they wrap. Anthropic believed it too. They've powered every official Claude SDK since day one. Congrats to the Stainless team on joining @Anthro

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