How SDKs show up in this material In this channel's captured material, an SDK (software development kit) is the developer-facing package that goes hand-in-hand with an API: it is what Stainless, described as the API company, builds and ships so that other developers can actually connect their software to a service. [^913c216d-5ccb-51d9-8f42-8feb7c017d9d@22] The most concrete usage comes from the founder of Stainless, who explains that his company builds the APIs and the SDKs for major AI companies like OpenAI and Anthropic — with Anthropic now a customer in a much bigger sense, having bought the dev-tools business for a reported $300M. [^913c216d-5ccb-51d9-8f42-8feb7c017d9d@22] The same framing appears when Stainless's remit is summarized: they build the APIs and SDKs for major AI companies, and they're now extending that same work into building MCP servers. [^ea9761fa-0184-555e-be30-4928a6682680@22] [^ea9761fa-0184-555e-be30-4928a6682680@34] Where SDKs fit in the bigger picture SDKs matter here because they sit inside the conversation about MCP (Model Context Protocol) — the technology that turns any website or web service into a set of tools an AI can use natively to get work done. The episode's thesis is that companies that understand how to do MCP well are positioned to win over the next decade, and the SDK-building layer (Stainless) is one of the pieces of AI infrastructure — dev tools, standard protocols, and enterprise agent platforms — that turns MCP from an idea into working infrastructure. - SDK = software development kit, the packaged developer tooling built alongside an API. - In this material, Stainless is the company that builds the APIs and SDKs for OpenAI and Anthropic. [^913c216d-5ccb-51d9-8f42-8feb7c017d9d@22] - Stainless is now applying the same expertise to building MCP servers. [^ea9761fa-0184-555e-be30-4928a6682680@34]