1.fastapi / fastapi
FastAPI framework, high performance, easy to learn, fast to code, ready for production
+2,242 stars
from 102,297 · score 7.72
Trending repositories
Ranked by Attention Score: stars gained over the last 30 complete days
32 repositories by Attention Score · Oct 4, 2026 – Nov 2, 2026 (UTC)
2.usebruno / bruno
Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)
+727 stars
from 47,253 · score 6.59
3.scalar / scalar
Scalar is an open-source API platform: 🌐 Modern REST API Client 📖 Beautiful API References ✨ 1st-Class OpenAPI/Swagger Support
+165 stars
from 16,191 · score 5.11
4.apache / apisix
The Cloud-Native API Gateway and AI Gateway
+112 stars
from 17,170 · score 4.73
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)
+91 stars
from 26,753 · score 4.52
6.Redocly / redoc
📘 OpenAPI/Swagger-generated API Reference Documentation
+79 stars
from 25,917 · score 4.38
7.danielgtaylor / huma
Huma REST/HTTP API Framework for Golang with OpenAPI 3.1
+78 stars
from 4,433 · score 4.37
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.
+64 stars
from 29,006 · score 4.17
9.oasdiff / oasdiff
OpenAPI Diff and Breaking Changes
+51 stars
from 1,395 · score 3.95
10.oapi-codegen / oapi-codegen
Generate Go client and server boilerplate from OpenAPI 3 specifications
+46 stars
from 8,593 · score 3.85
11.mockoon / mockoon
Mockoon is the easiest and quickest way to run mock APIs locally. No remote deployment, no account required, open source.
+43 stars
from 8,424 · score 3.78
12.microsoft / typespec
No description provided by the repository host.
+36 stars
from 5,874 · score 3.61
13.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.
+28 stars
from 3,219 · score 3.37
14.Redocly / redocly-cli
⚒️ Redocly CLI makes OpenAPI easy. Lint/validate to any standard, generate beautiful docs, and more.
+28 stars
from 1,516 · score 3.37
15.stoplightio / prism
Turn any OpenAPI2/3 and Postman Collection file into an API server with mocking, transformations and validations.
+26 stars
from 5,038 · score 3.30
16.microcks / microcks
The open source, cloud native tool for API Mocking and Testing. Microcks is a Cloud Native Computing Foundation incubating project 🚀
+23 stars
from 2,050 · score 3.18
17.zuplo / zudoku
Framework for building high quality, interactive API documentation.
+15 stars
from 598 · score 2.77
18.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.
+14 stars
from 17,781 · score 2.71
19.rapi-doc / RapiDoc
RapiDoc -WebComponent for OpenAPI Spec
+11 stars
from 1,899 · score 2.48
20.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
+10 stars
from 1,131 · score 2.40
21.stoplightio / elements
Build beautiful, interactive API Docs with embeddable React or Web Components, powered by OpenAPI and Markdown.
+9 stars
from 2,463 · score 2.30
22.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.
+8 stars
from 875 · score 2.20
23.springdoc / springdoc-openapi
Library for OpenAPI 3 with spring-boot
+7 stars
from 3,736 · score 2.08
24.swagger-api / swagger-editor
Swagger Editor
+5 stars
from 9,462 · score 1.79
25.sourcey / sourcey
Precision documentation from OpenAPI, MCP, Doxygen, and Markdown guides. Static HTML you own.
+4 stars
from 1,371 · score 1.61
26.sourcemeta / awesome-jsonschema
A curated list of awesome JSON Schema resources, tutorials, tools, and more
+4 stars
from 168 · score 1.61
27.OpenAPITools / openapi-diff
Utility for comparing two OpenAPI specifications.
+3 stars
from 1,096 · score 1.39
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.
+3 stars
from 397 · score 1.39
29.go-fuego / fuego
Golang Fuego - Web framework generating OpenAPI 3 spec from source code - Pluggable to existing Gin & Echo APIs
+2 stars
from 1,773 · score 1.10
30.Luracast / Restler
Zero-boilerplate REST API framework for PHP 8+. Auto-generates routes, docs, validation.
+1 stars
from 1,385 · score 0.69
31.apiflask / apiflask
A lightweight Python web API framework.
+1 stars
from 1,139 · score 0.69
32.oaswrap / spec
⚡A lightweight, framework-agnostic OpenAPI 3.x specification builder for Go.
+1 stars
from 119 · score 0.69