
Scalar API is a modern API platform based on the OpenAPI standard, primarily offering API documentation generation, interactive client testing, SDK generation, and unified management.
Key features include automatic generation of API reference docs, an interactive API client for testing, OpenAPI-based SDK generation for multiple languages, and centralized management of API specifications via Scalar Registry.
Scalar API offers multiple plans from free to enterprise. Core features like API reference documentation generation are free, while advanced capabilities such as guides authoring and SDK generation may require a paid plan.
Integrates via dashboard, CLI, and GitHub Actions, or via NuGet packages (e.g., Scalar.AspNetCore) for ASP.NET Core projects.
Its interactive client supports simulated API keys, OAuth2, and other common authentication methods for authorized API testing.
Prerequisites: an API definition file conforming to the OpenAPI (Swagger) specification; most features are built around this standard.
Scalar API offers a more modern UI/UX with client testing, SDK generation, and more, often regarded as an enhanced or alternative to Swagger UI.
Offers free subdomains for hosting, and can be embedded into your own HTML pages or integrated with front-end frameworks like Next.js or React, with support for custom domains.

Softr AI Builder is an AI-powered no-code platform that lets users quickly generate full-featured web apps—such as customer portals, internal tools, and dashboards—by describing requirements in plain language. It’s designed to help non-technical business users turn ideas into operational digital solutions fast.
Stacker AI is an enterprise no-code AI app builder that helps non-technical users turn spreadsheets, databases and other data sources into custom interactive applications and intelligent portals. With visual building tools and AI assistance, it supports customer portals, work management, flexible CRM and other business scenarios to unify data and workflows and improve operational efficiency.