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Scalar

Scalar is a fully remote, open-source API platform for building, documenting and maintaining APIs, covering documentation, type-safe SDK generation, MCP servers, an offline-first API client and AI API agents.

Scalar is an open-source API platform that helps developers and companies build, document, and maintain API interfaces. The company operates fully remotely and serves enterprises and individual developers worldwide. Its stated values are accessibility, open-source and API-first development, and it maintains SOC 2 and GDPR compliance.

Scalar's product line covers the API lifecycle. API Documentation offers Markdown and MDX support and stays in sync automatically as APIs evolve. SDK Generation produces type-safe SDKs in six programming languages: TypeScript, Python, Go, PHP, Java and Ruby. Other products include an open-source offline-first API client for testing APIs, automatically generated and synchronised MCP (Model Context Protocol) servers, and AI-powered conversational API agents.

The engineering work spans API documentation, SDK and MCP server generation, type-safe code generation, offline-first client software and AI-driven tooling. The stated aim is to give teams Stripe-level API infrastructure without a dedicated platform team, and to reduce friction for developers building on top of APIs.

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