1.scalar / scalar
Scalar is an open-source API platform: 🌐 Modern REST API Client 📖 Beautiful API References ✨ 1st-Class OpenAPI/Swagger Support
+1,555 stars
from 14,801 · score 7.35
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Ranked by Attention Score: stars gained over the last 180 complete days
11 repositories by Attention Score · May 7, 2026 – Nov 2, 2026 (UTC)
2.Redocly / redoc
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3.mockoon / mockoon
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+269 stars
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4.stoplightio / spectral
A flexible JSON/YAML linter for creating automated style guides, with baked in support for OpenAPI (v3.1, v3.0, and v2.0), Arazzo v1.0, as well as AsyncAPI v2.x.
+175 stars
from 3,072 · score 5.17
5.stoplightio / prism
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+164 stars
from 4,900 · score 5.11
6.Redocly / redocly-cli
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+107 stars
from 1,437 · score 4.68
7.zuplo / zudoku
Framework for building high quality, interactive API documentation.
+96 stars
from 517 · score 4.57
8.sourcey / sourcey
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+86 stars
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9.stoplightio / elements
Build beautiful, interactive API Docs with embeddable React or Web Components, powered by OpenAPI and Markdown.
+76 stars
from 2,396 · score 4.34
10.opticdev / opticArchived
OpenAPI linting, diffing and testing. Optic helps prevent breaking changes, publish accurate documentation and improve the design of your APIs.
+3 stars
from 1,527 · score 1.39
11.compactr / compactr.js
OpenAPI based binary serialization
+1 stars
from 107 · score 0.69