# Scalar

**Canonical:** https://apis.io/providers/scalar-api/  
**Website:** https://scalar.com  
**APIs profiled:** 8

Scalar is an open-source (MIT) API platform built on the OpenAPI standard. Its core is a self-hostable API Reference renderer that turns an OpenAPI or AsyncAPI document into a beautiful, interactive reference with a built-in API testing tool, plus a fully open-source, offline-first API Client (a Postman alternative available as a desktop app and in the browser). On top of the open-source components Scalar runs a hosted SaaS platform (dashboard.scalar.com) providing an API Registry that stores and versions OpenAPI documents behind a public read CDN (registry.scalar.com), a Docs product for developer portals with Git Sync and Markdown/MDX, SDK generation for TypeScript, Python, Go, Java, PHP, C#, and Ruby, hosted MCP servers, and an AI Agent for chatting with APIs. Scalar is the default API documentation UI for many frameworks (FastAPI, Hono, Elysia, NestJS, Laravel, and others). Publishing to the hosted registry is done through the Scalar CLI; the registry read surface and the Galaxy example API are public over HTTPS.

## Kin Score — 38.3 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 38.3).

| Facet | Score |
|---|---|
| Discoverability | 64.8 |
| Contract Quality | 58.7 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 34.2 |
| Developer Ergonomics | 23.8 |
| Commercial Clarity | 39.5 |
| Access Clarity | 39.5 |

## Agent readiness — 35.0 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | verified |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (8)

- **Scalar API Reference** — Open-source (MIT) renderer that turns an OpenAPI/Swagger or AsyncAPI document into an interactive API reference with a built-in request-testing panel and multi-language code sam...
- **Scalar API Client** — Fully open-source, offline-first API client built on the OpenAPI standard - a Postman/Insomnia alternative for sending REST, GraphQL, and WebSocket requests, organizing collecti...
- **Scalar Docs Platform** — Hosted developer-portal product that combines Markdown/MDX guides with generated API references, custom domains and subdomains, themes, versions, and two-way Git Sync from GitHu...
- **Scalar CLI** — Open-source command-line tool (@scalar/cli) for validating and linting OpenAPI documents (Spectral rules), previewing references, and publishing/listing/ updating/deleting docum...
- **Scalar SDK Generation** — Hosted SDK generation that produces type-safe client libraries from an OpenAPI document for TypeScript, Python, Go, Java, PHP, C#, and Ruby, kept in sync with the registry. Paid...
- **Scalar Agent and MCP** — AI layer that lets developers chat with an API inside the docs and exposes hosted MCP (Model Context Protocol) servers generated from an OpenAPI document so agents can call the ...
- **Scalar Registry Management API** — Publish / list / update / delete documents - performed via the Scalar CLI (modeled).
- **Scalar Registry Read API** — Public retrieval of published OpenAPI documents (confirmed public surface).

## Agentic access (1)

- **Scalar Api Agentic Access** — 4 operations · 1 acting

## Security (1)

- **Scalar Api Authentication** — apiKey · 1 scheme

## Plans (1)

- **Scalar Api Plans Pricing**

## Tags

API Documentation, API Client, Open-Source, Developer Tools, API Reference, OpenAPI

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/scalar-api/). Scores are computed from the provider's own public artifacts under a published rubric.