Since launching Docs early access, we’ve worked with teams like Anthropic, Cloudflare, and OpenAI to build the next generation of docs sites. One thing that is clear is that agents are now a primary audience and contributor. This post covers what’s changing, how teams are using coding agents to build and customize docs, and why a code-first approach is quickly becoming the default.

Stainless Docs Platform is now in public beta. It provides a code-first documentation platform designed for both human developers and AI agents, with built-in AI chat, SDK-aware API reference, docs-as-code workflows, flexible theming, and fast infrastructure.

Introducing our experimental SQL SDK generator, a new way to query REST APIs directly from PostgreSQL using standard SQL. By transforming an OpenAPI spec into a typed PostgreSQL extension, every API endpoint becomes a SQL function and every response becomes a composite type, enabling type-safe queries without JSON parsing or ETL pipelines. Designed for analytics, reconciliation, and batch workflows, this approach lets you join live API data with your existing tables while preserving pagination control and planner optimizations.

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.

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.

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.

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.

Introducing the Stainless Docs Platform, now available in early access. Build doc sites for REST APIs, SDKs, and hand-written docs that evolve alongside your API spec. Powered by Astro, so you can customize anything and deploy anywhere.

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.

Stainless generates the official client libraries for OpenAI, Anthropic, Cloudflare, and more. Today, we’re making the Stainless SDK generator available to every developer with a REST API.