The Stainless Language Server brings Studio’s editing capabilities directly into your local development environment. Get real-time diagnostics, spec-aware completions, cross-file navigation, and live Transforms updates as you edit your stainless.yml and OpenAPI spec.

Learn how to generate a production-ready TypeScript SDK from an OpenAPI spec. Compare OpenAPI Generator with Stainless for type safety, retries, pagination, and streaming.

Stainless can now generate a production-ready CLI directly from your OpenAPI spec. Ship native binaries with structured commands, robust argument parsing, automatic pagination, shell completions, man pages, and built-in documentation, all kept in sync with your SDKs from a single source of truth.

In this post, we examine the reasons you might consider building an SDK for your product. SDKs speed developer adoption, reduce support burden, unlock enterprise customers, and help LLMs use your API more effectively.

In 2025, Stainless made major progress to enable any company to build world-class APIs. We shipped new language support for our SDK generator, a dynamic docs platform, and support for MCP servers derived from your OpenAPI spec. In 2026, every company needs to become an API company, and Stainless is excited to make it happen with you!

Most OpenAPI specs are “mostly right,” but small inconsistencies can break generated SDKs. This post explains when OpenAPI Overlays are enough—and how Stainless Transforms handle harder fixes like schema deduplication, structural renames, and language-aware naming without modifying the upstream spec.

Learn how to maximize the growth potential of your API and minimize your costs at the same time.

A practical guide for API platform teams deciding between hand-written SDKs and generators like Stainless. It breaks down when generation wins (HTTP-heavy, multi-language, spec-driven clients), when custom code is better (logic-first libraries), and why a hybrid approach often delivers the best developer experience.

Stainless preview builds solve the biggest problem blocking API development at scale: engineers can't see how their OpenAPI changes affect SDKs until after they ship. Now you and your team can see exact SDK diffs and test locally without leaving your pull request.

Ruby SDK and Terraform provider generators are now generally available, along with major upgrades to MCP, TypeScript, Go, and Java. Our free tier is also expanded to support up to 5 SDKs.

You can now generate MCP servers for free using your OpenAPI spec.