What Stainless Does Stainless describes itself in this material as the API company. Its job is to help computers talk to each other: it builds the APIs and SDKs for major AI companies like OpenAI and Anthropic. [^913c216d-5ccb-51d9-8f42-8feb7c017d9d@22] That places it at a practical layer of the AI infrastructure stack — the plumbing that lets software talk to AI providers at all. Stainless and MCP Stainless is not standing still as the ecosystem shifts. In the captured conversation, its founder and CEO Alex Rattray explains that the company is now starting to build MCP servers too. [^913c216d-5ccb-51d9-8f42-8feb7c017d9d@34] That matters because MCP — Model Context Protocol — is positioned in this material as the bridge that turns any website or web service into a set of tools an AI can use natively to get work done. [^913c216d-5ccb-51d9-8f42-8feb7c017d9d@11] Why the Conversation Matters The episode uses Stainless as a lens on open questions in AI infrastructure: what the future of MCP looks like, how to design good MCPs, and why MCPs are, in the host's words, really hard to scale and possibly insecure. [^913c216d-5ccb-51d9-8f42-8feb7c017d9d@46] The host also discloses openly that he is a tiny investor in Stainless and a longtime friend of its founder. [^913c216d-5ccb-51d9-8f42-8feb7c017d9d@99] Key Points - Stainless is the API company — it builds APIs and SDKs for companies like OpenAI and Anthropic. - It is now extending that work into MCP servers. - Its founder and CEO is Alex Rattray. - The host discloses being a small investor in the company and a longtime friend of its founder.