New

Stainless Docs Platform - Early Access

New

Stainless Docs Platform

Best-in-class developer interfaces for your API

A great developer experience fuels API adoption, reduces support burden, and helps integrators ship faster.

Built from decades of experience at API companies like Stripe, Heroku, Meta, Twilio, and more, Stainless helps you deliver robust and idiomatic SDKs, documentation that keeps up with your API, and token-efficient MCP servers.

TypeScript

Python

Java

Kotlin

Ruby

Terraform

PHP

import OpenAI from "openai";
import { zodTextFormat } from "openai/helpers/zod";
import { z } from "zod";

const openai = new OpenAI();
const format = zodTextFormat(
  z.object({ namesOfParticipants: z.array(z.string()) }),
  "namesOfParticipants"
);
const response = await openai.responses.parse({
  model: "gpt-5",
  instructions: "Extract the names of the participants.",
  input: "Alice and Bob are going to a science fair on Friday.",
  text: { format },
});
console.log(response.output_parsed);

TypeScript

Python

Java

Kotlin

Ruby

Terraform

PHP

import OpenAI from "openai";
import { zodTextFormat } from "openai/helpers/zod";
import { z } from "zod";

const openai = new OpenAI();
const format = zodTextFormat(
  z.object({ namesOfParticipants: z.array(z.string()) }),
  "namesOfParticipants"
);
const response = await openai.responses.parse({
  model: "gpt-5",
  instructions: "Extract the names of the participants.",
  input: "Alice and Bob are going to a science fair on Friday.",
  text: { format },
});
console.log(response.output_parsed);

TypeScript

Python

Java

Kotlin

Ruby

Terraform

PHP

import OpenAI from "openai";
import { zodTextFormat } from "openai/helpers/zod";
import { z } from "zod";

const openai = new OpenAI();
const format = zodTextFormat(
  z.object({ namesOfParticipants: z.array(z.string()) }),
  "namesOfParticipants"
);
const response = await openai.responses.parse({
  model: "gpt-5",
  instructions: "Extract the names of the participants.",
  input: "Alice and Bob are going to a science fair on Friday.",
  text: { format },
});
console.log(response.output_parsed);

Get started

TypeScript

Python

Java

Kotlin

Ruby

Terraform

PHP

import OpenAI from "openai";
import { zodTextFormat } from "openai/helpers/zod";
import { z } from "zod";

const openai = new OpenAI();
const format = zodTextFormat(
  z.object({ namesOfParticipants: z.array(z.string()) }),
  "namesOfParticipants"
);
const response = await openai.responses.parse({
  model: "gpt-5",
  instructions: "Extract the names of the participants.",
  input: "Alice and Bob are going to a science fair on Friday.",
  text: { format },
});
console.log(response.output_parsed);

TypeScript

Python

Java

Kotlin

Ruby

Terraform

PHP

import OpenAI from "openai";
import { zodTextFormat } from "openai/helpers/zod";
import { z } from "zod";

const openai = new OpenAI();
const format = zodTextFormat(
  z.object({ namesOfParticipants: z.array(z.string()) }),
  "namesOfParticipants"
);
const response = await openai.responses.parse({
  model: "gpt-5",
  instructions: "Extract the names of the participants.",
  input: "Alice and Bob are going to a science fair on Friday.",
  text: { format },
});
console.log(response.output_parsed);

Trusted by top API companies

SDK Generator

Robust and idiomatic SDKs

Stainless generates production-ready SDKs depended on by millions of developers every day. We handle the boilerplate—HTTP requests, retries with exponential backoff, streaming, and pagination—so your users can focus on building.

Stainless SDK examples

TypeScript

Python

Java

Kotlin

Ruby

PHP

Beta

Terraform

Early access

Rust

Coming soon

Swift

Coming soon

“Proud to have Stainless as a partner at OpenAI.
All our SDKs are generated by them. The team is extremely thoughtful about SDK design and push us to improve our API + other products while they're at it.
Stainless is bringing a new standard of SDKs to our industry and this is a great thing for all developers.”

Nikunj Handa

API Product - OpenAI

“Proud to have Stainless as a partner at OpenAI.
All our SDKs are generated by them. The team is extremely thoughtful about SDK design and push us to improve our API + other products while they're at it.
Stainless is bringing a new standard of SDKs to our industry and this is a great thing for all developers.”

Nikunj Handa

API Product - OpenAI

“Proud to have Stainless as a partner at OpenAI.
All our SDKs are generated by them. The team is extremely thoughtful about SDK design and push us to improve our API + other products while they're at it.
Stainless is bringing a new standard of SDKs to our industry and this is a great thing for all developers.”

Nikunj Handa

API Product - OpenAI

“Proud to have Stainless as a partner at OpenAI.
All our SDKs are generated by them. The team is extremely thoughtful about SDK design and push us to improve our API + other products while they're at it.
Stainless is bringing a new standard of SDKs to our industry and this is a great thing for all developers.”

Nikunj Handa

API Product - OpenAI

New

Stainless Docs Platform

API docs + SDK docs + handwritten guides, perfectly in sync

Go from an OpenAPI spec to a live, interactive documentation site in minutes. Built on Astro, the Stainless Docs Platform combines your API reference, usage examples, and narrative guides into a single, cohesive experience that evolves with your API.

Explore Stainless Docs Platform

Docs for people who write code

Devs aren’t writing code with your raw API, they use your SDK - don’t force them to make a leap.

Docs for people who write code

Devs aren’t writing code with your raw API, they use your SDK - don’t force them to make a leap.

Docs for people who write code

Devs aren’t writing code with your raw API, they use your SDK - don’t force them to make a leap.

Docs for people who write code

Devs aren’t writing code with your raw API, they use your SDK - don’t force them to make a leap.

Production grade out of the box

Rock-solid reliability with statically-generated content, deployed to Cloudflare automatically or your cloud on-demand.

Production grade out of the box

Rock-solid reliability with statically-generated content, deployed to Cloudflare automatically or your cloud on-demand.

Production grade out of the box

Rock-solid reliability with statically-generated content, deployed to Cloudflare automatically or your cloud on-demand.

Production grade out of the box

Rock-solid reliability with statically-generated content, deployed to Cloudflare automatically or your cloud on-demand.

Endlessly extensible

Supports components from every major UI framework. Fork, override, or add your own. Author content in Markdown, MDX, Markdoc and more.

Endlessly extensible

Supports components from every major UI framework. Fork, override, or add your own. Author content in Markdown, MDX, Markdoc and more.

Endlessly extensible

Supports components from every major UI framework. Fork, override, or add your own. Author content in Markdown, MDX, Markdoc and more.

Endlessly extensible

Supports components from every major UI framework. Fork, override, or add your own. Author content in Markdown, MDX, Markdoc and more.

“We knew we wanted great docs for our new API, but we just didn't know how long that might take. With Stainless we were able to go live in just 2 days.”

Batuhan İçöz

Beeper

“We knew we wanted great docs for our new API, but we just didn't know how long that might take. With Stainless we were able to go live in just 2 days.”

Batuhan İçöz

Beeper

“We knew we wanted great docs for our new API, but we just didn't know how long that might take. With Stainless we were able to go live in just 2 days.”

Batuhan İçöz

Beeper

“We knew we wanted great docs for our new API, but we just didn't know how long that might take. With Stainless we were able to go live in just 2 days.”

Batuhan İçöz

Beeper

New

MCP Generator

MCP servers built for frontier models

Generate production-ready MCP servers that work seamlessly with Claude, Cursor, and other agentic clients. Stainless generated MCP servers automatically optimize your API responses for token-constrained LLM context windows.

Explore MCP Server Generator

Dynamic tool discovery

Minimal token usage

Granular tool exposure

Client-optimized tool schemas

“Stainless has been a wonderful partner in helping us generate SDKs for Cloudflare’s API and is now one of the fastest ways to get up and running with MCP servers. Building great MCP servers requires tasteful product thinking, and we’re excited that Stainless is already thinking beyond just mapping REST APIs to MCP tools 1:1.”

Brendan Irvine-Broque

Director of Product, Cloudflare Workers

“Stainless has been a wonderful partner in helping us generate SDKs for Cloudflare’s API and is now one of the fastest ways to get up and running with MCP servers. Building great MCP servers requires tasteful product thinking, and we’re excited that Stainless is already thinking beyond just mapping REST APIs to MCP tools 1:1.”

Brendan Irvine-Broque

Director of Product, Cloudflare Workers

“Stainless has been a wonderful partner in helping us generate SDKs for Cloudflare’s API and is now one of the fastest ways to get up and running with MCP servers. Building great MCP servers requires tasteful product thinking, and we’re excited that Stainless is already thinking beyond just mapping REST APIs to MCP tools 1:1.”

Brendan Irvine-Broque

Director of Product, Cloudflare Workers

“Stainless has been a wonderful partner in helping us generate SDKs for Cloudflare’s API and is now one of the fastest ways to get up and running with MCP servers. Building great MCP servers requires tasteful product thinking, and we’re excited that Stainless is already thinking beyond just mapping REST APIs to MCP tools 1:1.”

Brendan Irvine-Broque

Director of Product, Cloudflare Workers

The API Company

Stainless provides the platform to deliver a world-class, Stripe-quality developer experience for any API.

Trusted by leaders like OpenAI, Anthropic, Cloudflare, and more, our solutions draw on decades of expertise from Stripe, Heroku, Twilio, and beyond to empower millions of developers, freeing your team to innovate on core business logic.

See our story

API Framework - Coming soon

We’re building a full-stack TypeScript API Framework. It’s inspired by the internal API Framework we used at Stripe, and will enable you to build amazing REST API’s from the get-go with end-to-end type safety, pagination, auth, and more built-in.

Know when the framework launches

API Framework - Coming soon

Know when the framework launches

API Framework - Coming soon

Know when the framework launches

API Framework - Coming soon