Anthropic Acquires Stainless

Anthropic has acquired Stainless, a company specializing in SDKs and Model Context Protocol (MCP) server tooling. This acquisition is intended to accelerate the development of AI agents that can act upon external systems, expanding the reach and connectivity of the Claude platform.

Integration of SDK and MCP Tooling

Stainless provides the infrastructure used to generate official Anthropic SDKs, as well as command-line interfaces (CLIs) and MCP servers. By integrating Stainless, Anthropic aims to improve the developer experience and the ability of AI agents to connect to data and tools.

Stainless converts API specifications into native-feeling SDKs across multiple languages, including TypeScript, Python, Go, and Java. Thisn

Strategic Focus on Agent Connectivity

Anthropic's strategy focuses on the transition from models that simply answer questions to agents that can perform actions. According to Katelyn Lesse, Head of Platform Engineering at Anthropic, "Agents are only as useful as what they can connect to."

This acquisition complements Anthropic's creation of the Model Context Protocol (MCP), which was designed to make agent connectivity possible. The combined efforts of the Stainless and Anthropic teams will focus on advancing Claude's ability to interact with external data and tools.

Background on the Partnership

Stainless was founded in 2022 and has been the provider for every official Anthropic SDK since the early stages of the API. Alex Rattray, Founder and CEO of Stainless, noted that the partnership began early on, stating that "SDKs deserve as much care as the APIs they wrap."

Key Capabilities of Stainless

• Multi-language Support: Generation of SDKs in TypeScript, Python, Go, and Java.
• Tooling Generation: Creation of CLIs and MCP servers from API specifications.
• Developer Experience: Focus on creating fast, reliable, and native-feeling libraries for developers.