Anthropic has acquired Stainless, a company that provides SDKs and MCP server tooling, to extend the reach of its AI agents. Stainless has been working with Anthropic since the early days of its API and has powered the generation of every official Anthropic SDK. The acquisition aims to advance Claude's ability to connect to data and tools. The Stainless team will continue to work on developing a platform that manages the end-to-end release process.