Advanced REST Client (ARC)

API testing tool. Which allows web developers to create and test custom HTTP requests.

18 Alternatives To Advanced REST Client (ARC)

HTTP Toolkit

Beautiful, cross-platform & open-source tools to debug, test & build with HTTP(S). One-click setup for browsers, servers, CLI tools, scripts and more.
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Parasoft SOAtest

Parasoft SOAtest automates complete end-to-end testing for business and security-critical transactions.

WSO2 API Manager

WSO2 API Manager is a 100% open source enterprise-class solution that supports API publishing, lifecycle management, application development, access control, rate limiting and analytics in one cleanly integrated system.

Zed Attack Proxy

The Zed Attack Proxy (ZAP) is an easy to use integrated penetration testing tool for finding…

mitmproxy

mitmproxy is an SSL-capable man-in-the-middle proxy for HTTP.