Stainless
Stainless provides developer-first tooling to generate and maintain SDKs, documentation, and MCP servers from your OpenAPI spec, aimed at delivering high-quality agent and developer experiences.
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What it does
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Stainless
Stainless is a developer-focused platform that automates the creation of idiomatic SDKs, up-to-date documentation, and MCP (Message/Model/Controller Proxy) servers directly from an OpenAPI specification. The product is built to improve both developer experience and downstream agent experience by ensuring clients, docs, and server stubs remain consistent with the API surface. Stainless targets engineering teams and platform owners who want reliable, maintainable developer interfaces across multiple programming languages and deployment environments.
Stainless emphasizes multi-language support and tooling, offering generated artifacts and state-of-the-art MCP servers so teams can ship integrations faster and reduce manual client-library maintenance. The company has announced it is joining Anthropic to continue its mission of improving software interfaces.
Stainless provides developer-first tooling to generate and maintain SDKs, documentation, and MCP servers from your OpenAPI spec, aimed at delivering high-quality agent and developer experiences.
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Claim this listingKey Features
OpenAPI-driven SDK generation
Generates robust, idiomatic SDKs for multiple languages directly from your OpenAPI spec to ensure clients are consistent and idiomatic.
Automatic documentation
Documentation that stays synchronized with your API so developer docs reflect the current API surface without manual updates.
MCP servers
State-of-the-art MCP servers derived from OpenAPI to provide reliable server stubs and runtime components for agent and developer workflows.
Multi-language support
First-class support for many languages and ecosystems including TypeScript, Python, Go, Java, Kotlin, Ruby, Terraform, C#, and PHP.
CLI quickstart & developer tooling
Command-line quickstarts and SDK tooling to onboard engineers quickly and integrate into CI/CD workflows.
Pricing
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Use Cases
Create and maintain SDKs
Automatically generate and publish idiomatic client libraries for multiple languages so teams don't hand-write and maintain clients.
Keep docs in sync with APIs
Generate documentation from OpenAPI to ensure developer docs always match the live API.
Provision MCP servers
Deploy server stubs and runtime components derived from OpenAPI to support agent runtime and proxy scenarios.
Speed developer onboarding
Provide consistent SDKs, docs, and quickstarts to reduce time to first call for external and internal developers.
Integrations
Cloudflare
Listed customer; likely used with Stainless for edge or CDN integration scenarios.
Letta
Listed customer; example of a company using Stainless-generated interfaces.
Lithic
Listed customer; demonstrates use by fintech or payments platforms.
Modern Treasury
Listed customer; shows applicability to financial API ecosystems.
MUX
Listed customer; example of media/video platform usage.
OpenAI
Listed customer/partner; indicates usage alongside AI platform providers.
Replicate
Listed customer; integration or usage example in ML model-serving workflows.
Turbopuffer
Listed customer; additional example of integrated tooling customers.
Weights & Biases
Listed customer; shows applicability to ML experiment tracking and model workflows.
Benefits
Limitations
Frequently Asked Questions
What input format does Stainless require to generate SDKs and servers?
Which programming languages are supported for generated SDKs?
How do I get started with Stainless?
Is Stainless still an independent company?
Getting Started
- 1 Create an account on Stainless or sign in to your existing account.
- 2 Prepare or upload your OpenAPI specification to Stainless.
- 3 Use the CLI quickstart or dashboard to generate SDKs, documentation, and MCP servers for your target languages.
Support
Docs
Documentation available via the Stainless documentation site (link referenced on the site).
Contact sales
Contact sales is listed on the site for enterprise inquiries.
CLI quickstart
Command-line quickstart resources are available to help onboard developers.
Changelog / Blog
Changelog and blog posts are listed as resources for updates and announcements.
API
https://stainless.com/docs
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