1.NangoHQ / nango
Connect your agents & product to 1,000 APIs.
+1,777 stars
from 11,297 · score 7.48
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Ranked by Attention Score: stars gained over the last 90 complete days
7 repositories by Attention Score · Aug 5, 2026 – Nov 2, 2026 (UTC)
2.hoppscotch / hoppscotch
Open-Source API Development Ecosystem • https://hoppscotch.io • Offline, On-Prem & Cloud • Web, Desktop & CLI • Open-Source Alternative to Postman, Insomnia
+1,031 stars
from 79,686 · score 6.94
3.scalar / scalar
Scalar is an open-source API platform: 🌐 Modern REST API Client 📖 Beautiful API References ✨ 1st-Class OpenAPI/Swagger Support
+616 stars
from 15,740 · score 6.42
4.Kong / insomnia
The open-source, cross-platform API client for GraphQL, REST, WebSockets, SSE and gRPC. With Cloud, Local and Git storage.
+350 stars
from 39,756 · score 5.86
5.stepci / stepci
Automated API Testing and Quality Assurance
+16 stars
from 1,857 · score 2.83
6.zuplo / mockbin
Mockbin by Zuplo. Mock, Test, and View HTTP Requests and Responses
+4 stars
from 139 · score 1.61
7.bottenderjs / messaging-apis
Messaging APIs for multi-platform
+2 stars
from 1,934 · score 1.10