Best HTTP Clients in 2026

The Collaboration Platform for API Development.

Key Postman features:

User-Friendly Interface Collaboration Comprehensive Testing Tools Extensive API Documentation

Open Source

Aviation and flight API tailored for SMBs and individual developers, offering flight status, schedules, aircraft and airport data, statistics, historical data and more. Seamless REST/web hook integration via API marketplaces at affordable rates.

Key AeroDataBox features:

Flight Search ADS-B Feeding Flight Data API Flight Subscription & Alert API

Try for free freemium $7.5 / Monthly Sponsored

Design, debug, test, and mock APIs locally, on Git, or cloud. Build better APIs collaboratively for the most popular protocols with a dev‑friendly UI, built-in automation, and an extensible plugin ecosystem.

Key Insomnia REST features:

User-Friendly Interface Support for Multiple Protocols Environment Management Custom Plugins and Themes

Open Source

HTTP, HTTP2, HTTPS, Websocket debugging proxy.

Test APIs & webhooks instantly.

Key API Playground features:

Interactive API Testing Beginner-Friendly No Installation Required Quick Prototyping

free

Karve is a fast, native Windows workspace for the .http and .rest files already scattered across your repos. Organize, run, and inspect API requests offline - no account, no subscription.

Key Karve features:

Native Performance Offline Functionality Files Easy to Use

paid Free Trial $39.99 / One-off

Open source API development ecosystem.

Key Hoppscotch features:

User-Friendly Interface Open Source Multi-Platform Support Real-Time Collaboration

Open Source freemium

Bruno is a Git-integrated, fully offline, and open-source API client.

Key Bruno features:

User-Friendly Interface Comprehensive Feature Set Regular Updates Strong Customer Support

Open Source

CLI HTTP that will make you smile. JSON support, syntax highlighting, wget-like downloads, extensions, and more.

Key HTTPie features:

User-Friendly Syntax JSON Support Cross-Platform Plugin Support

Open Source

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

Key mitmproxy features:

Open Source Interactive Interface Scripting Support Cross-Platform

Open Source

HTTP proxy / HTTP monitor / Reverse Proxy.

Key Charles Proxy features:

Comprehensive HTTP/HTTPS Debugging User-Friendly Interface Support for Various Platforms Throttling Feature

Paw is a REST client for Mac.

Key RapidAPI for Mac features:

User Interface Team Collaboration Advanced Request Capabilities Extensions and Plugins

Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains.

Key Proxyman.io features:

User-Friendly Interface Cross-Platform Support Real-time Traffic Interception HTTPS Decryption

Open Source $49 / Annually

cURL is a computer software project providing a library and command-line tool for transferring data...

Key cURL features:

Versatility Cross-Platform Command-Line Usage Automation

Open Source