Scalar

OpenAPI platform for API documentation, SDK generation, registry management, and client testing

scalar.com

Verified API available Free tier ~6.9k monthly visits

Quick facts
What is it	OpenAPI platform for API documentation, SDK generation, registry management, and client testing
Pricing	Freemium — from $72/mo
Free tier	Yes
Platform	Web Application
API	Yes
Best for	Generating client SDKs for multiple programming languages, Creating and maintaining API documentation
Domain registered	1996

Data updated Aug. 1, 2026

What does Scalar do?

Scalar is a comprehensive platform built around the OpenAPI standard that helps developers create, manage, and work with APIs more effectively. It provides four main products: API documentation with Markdown and MDX support, an API registry for version control, SDK generation for multiple programming languages, and an open-source API client for testing. The platform focuses on OpenAPI compliance and integrates deeply with Git workflows, making it suitable for teams practicing API-first development.

What sets Scalar apart is its commitment to open standards and open-source principles. The API client is fully open-source and works offline, while the entire platform avoids vendor lock-in. The SDK generation feature automatically creates type-safe client libraries for TypeScript, Python, Golang, PHP, Java, and Ruby from OpenAPI documents. The documentation system supports custom HTML/CSS/JS and fine-grained access control, giving teams flexibility in how they present their APIs.

This tool is particularly valuable for development teams building and maintaining APIs, technical writers creating documentation, and companies practicing API-first development. It helps ensure consistency between API specifications, documentation, and client libraries while providing testing tools that work directly with OpenAPI definitions. The Git integration means everything stays synchronized with your codebase, making it ideal for CI/CD workflows and teams that need to keep their API ecosystem up to date.

DevOps & CI/CD Non-AI Developer Tools — Other

#api documentation#api testing#developer tools#openapi#sdk generation

Key features

What makes it stand out

Generate type-safe SDKs for multiple programming languages from OpenAPI specs

Create interactive API documentation with Markdown/MDX support and GitHub sync

Centralized API registry for versioning OpenAPI documents and JSON schemas

Open-source API client for testing with offline-first capabilities

Git integration for continuous synchronization with your codebase

Who is Scalar for?

Who benefits most from this tool

Generating client SDKs for multiple programming languages

Creating and maintaining API documentation

Testing and debugging API endpoints

Pricing

Free tier available — start without a credit card

Free

API References (OpenAPI)
1 Editor Seat
REST Client
Collections
Pre-request scripting
After-response scripting
Collection environments
Global environments
Local and private sub-environments
Test results
Collection runner
Open-Source (MIT)
Offline First
Web, MacOS, Linux, Windows
OpenAPI Support
No Vendor Lock In
OpenAPI, JSON Schema support
Spectral Rules
Preview API References
CLI
Chat on localhost
10 free messages (localhost)

Pro

$72.0/month

Everything in Free, plus:

Custom Domains
Guides
Versions
Git Sync
Markdown + MDX
Landing Pages
Full Developer Portal
SSO/SAML
RBAC
Priority Support
Dedicated Slack/Teams Channel
Cloud Sync
TypeScript SDK (+ $100)
Python SDK (+ $100)
C# SDK (+ $100)
Java SDK (+ $100)
PHP SDK (+ $100)
GO SDK (+ $100)
automated github workflow
Custom-code
Code Samples
Full OpenAPI Auth support
File Streaming
Full language publishing registry
Automatic sync with docs
Webhooks support
Migration services
SLAs
Private + Public Access
Git Integration
CI/CD workflows
Production deployment
250 messages included
$0.02/additional message
2,000,000 tokens included
$2/M additional input tokens
$10/M additional output tokens

Enterprise

Custom

Everything in Pro, plus:

SSO/SAML
RBAC
Priority Support
Dedicated Slack/Teams Channel
Migration services
SLAs
Dedicated Slack channel
TypeScript SDK (+ $100)
Python SDK (+ $100)
C# SDK (+ $100)
Java SDK (+ $100)
PHP SDK (+ $100)
GO SDK (+ $100)
250 messages included
$0.02/additional message
2,000,000 tokens included
$2/M additional input tokens
$10/M additional output tokens

Trust & presence

Domain Domain registered 1996

Gallery

Click any image to enlarge

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