1.fastapi / fastapi
FastAPI framework, high performance, easy to learn, fast to code, ready for production
+7,816 stars
from 96,723 · score 8.96
Trending repositories
Ranked by Attention Score: stars gained over the last 180 complete days
38 repositories by Attention Score · May 7, 2026 – Nov 2, 2026 (UTC)
2.usebruno / bruno
Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)
+4,832 stars
from 43,148 · score 8.48
3.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
4.apache / apisix
The Cloud-Native API Gateway and AI Gateway
+819 stars
from 16,463 · score 6.71
5.OpenAPITools / openapi-generator
OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (v2, v3)
+781 stars
from 26,063 · score 6.66
6.danielgtaylor / huma
Huma REST/HTTP API Framework for Golang with OpenAPI 3.1
+506 stars
from 4,005 · score 6.23
7.Redocly / redoc
📘 OpenAPI/Swagger-generated API Reference Documentation
+453 stars
from 25,543 · score 6.12
8.swagger-api / swagger-ui
Swagger UI is a collection of HTML, JavaScript, and CSS assets that dynamically generate beautiful documentation from a Swagger-compliant API.
+439 stars
from 28,631 · score 6.09
9.oapi-codegen / oapi-codegen
Generate Go client and server boilerplate from OpenAPI 3 specifications
+401 stars
from 8,238 · score 6.00
10.mockoon / mockoon
Mockoon is the easiest and quickest way to run mock APIs locally. No remote deployment, no account required, open source.
+269 stars
from 8,198 · score 5.60
11.oasdiff / oasdiff
OpenAPI Diff and Breaking Changes
+266 stars
from 1,180 · score 5.59
12.microsoft / typespec
No description provided by the repository host.
+226 stars
from 5,684 · score 5.42
13.microcks / microcks
The open source, cloud native tool for API Mocking and Testing. Microcks is a Cloud Native Computing Foundation incubating project 🚀
+203 stars
from 1,870 · score 5.32
14.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
15.stoplightio / prism
Turn any OpenAPI2/3 and Postman Collection file into an API server with mocking, transformations and validations.
+164 stars
from 4,900 · score 5.11
16.swagger-api / swagger-codegen
swagger-codegen contains a template-driven engine to generate documentation, API clients and server stubs in different languages by parsing your OpenAPI / Swagger definition.
+123 stars
from 17,672 · score 4.82
17.Redocly / redocly-cli
⚒️ Redocly CLI makes OpenAPI easy. Lint/validate to any standard, generate beautiful docs, and more.
+107 stars
from 1,437 · score 4.68
18.daveshanley / vacuum
vacuum is the worlds fastest and most versatile OpenAPI, Arazzo, AsyncAPI & JSON Schema linter, docs generator and toolkit. It tears through API specs at light speed. 100% compatible with Spectral rulesets, and OpenAPI 3.0, 3.1 and 3.2
+102 stars
from 1,039 · score 4.63
19.zuplo / zudoku
Framework for building high quality, interactive API documentation.
+96 stars
from 517 · score 4.57
20.sourcey / sourcey
Precision documentation from OpenAPI, MCP, Doxygen, and Markdown guides. Static HTML you own.
+86 stars
from 1,289 · score 4.47
21.go-fuego / fuego
Golang Fuego - Web framework generating OpenAPI 3 spec from source code - Pluggable to existing Gin & Echo APIs
+83 stars
from 1,692 · score 4.43
22.swagger-api / swagger-editor
Swagger Editor
+77 stars
from 9,390 · score 4.36
23.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
24.springdoc / springdoc-openapi
Library for OpenAPI 3 with spring-boot
+66 stars
from 3,677 · score 4.20
25.pb33f / libopenapi
libopenapi is a fully featured, high performance OpenAPI 3.2, 3.1, 3.0, Overlays and Arazzo parser, library, validator and toolkit for go applications.
+56 stars
from 827 · score 4.04
26.OpenAPITools / openapi-diff
Utility for comparing two OpenAPI specifications.
+34 stars
from 1,065 · score 3.56
27.rapi-doc / RapiDoc
RapiDoc -WebComponent for OpenAPI Spec
+32 stars
from 1,878 · score 3.50
28.specmatic / specmatic
Shift-left API Integration | Auto-fix integration drift before integration. Specmatic turns API specifications into executable contracts, continuously verifying that every change made by AI coding agents and engineers stays true to the desired behaviour. Ship AI-ready APIs 10x faster, from intent to implementation, with Spec-Driven API Development.
+31 stars
from 369 · score 3.47
29.apiflask / apiflask
A lightweight Python web API framework.
+18 stars
from 1,122 · score 2.94
30.oaswrap / spec
⚡A lightweight, framework-agnostic OpenAPI 3.x specification builder for Go.
+14 stars
from 106 · score 2.71
31.Mermade / openapi-gui
GUI / visual editor for creating and editing OpenAPI / Swagger definitions
+13 stars
from 1,479 · score 2.64
32.Luracast / Restler
Zero-boilerplate REST API framework for PHP 8+. Auto-generates routes, docs, validation.
+12 stars
from 1,374 · score 2.56
33.sourcemeta / awesome-jsonschema
A curated list of awesome JSON Schema resources, tutorials, tools, and more
+11 stars
from 161 · score 2.48
34.antst / go-apispec
Generate OpenAPI 3.1 specs from Go source code via static analysis — zero annotations, automatic framework detection
+9 stars
from 30 · score 2.30
35.apiaryio / dreddArchived
Language-agnostic HTTP API Testing Tool
+3 stars
from 4,211 · score 1.39
36.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
37.fsprojects / SwaggerProvider
F# generative Type Provider for Swagger
+3 stars
from 275 · score 1.39
38.compactr / compactr.js
OpenAPI based binary serialization
+1 stars
from 107 · score 0.69