The Stainless PHP SDK generator is generally available. It delivers strongly typed value objects that still behave like native PHP arrays, preserving language conventions while supporting advanced use cases like streaming, pagination, and custom request options.

The Stainless C# generator is generally available, bringing high quality SDKs to the .NET ecosystem. It features .NET Standard 2.0 support and an amazing editor experience, and does so with minimal dependencies.

Handling multiple resource variants in a REST API can be a tricky design challenge, with many considerations and trade-offs to take into account. In this post, we’ll look at an AI image generation API as an example, but the concepts we’re going to discuss are broadly applicable to any API with multiple resource variants.

When your job is building SDKs, a dependency manager that defies everyone’s expectations can wreak havoc, and working around third-party behavior can be tricky. Learn how and why we rejected a quick fix and took the time to develop a robust solution that meets our high quality bar.

Despite the hype, Model Context Protocol (MCP) isn’t magic or revolutionary. But, it’s simple, well-timed, and well-executed. At Stainless, we’re betting it’s here to stay.

Learn how to convert APIs into MCP servers using OpenAPI and Stainless. A technical guide to structuring tools, schemas, and workflows when generating MCP servers.

SDKs aren't just wrappers. They shape developer experience, reduce support burdens, and future-proof your API for AI.

How we handled $refs, client quirks, recursive schemas, and tool selection in a clean, extensible way.

Ensure forwards compatibility in Java SDKs by wrapping enums with a fallback _UNKNOWN case.

How to preserve source and binary compatibility for nullable fields in Java.