Best REST Client Products in 2026

Online API testing tool for REST & SOAP APIs. Test your API by making API calls directly from your browser.

Shared cloud environments for AI coding agents. Run Claude Code, Cursor CLI, Codex, and Gemini CLI from any device, API, or automation tool.

Key CloudCLI features:

Multi-Agent Support Git Integration Persistent Cloud Sessions Web UI & Mobile App

Try for free Open Source paid Free Trial €7.0 / Monthly

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

AutoML Tables enables data teams to automatically build and deploy state-of-the-art ML models on structured data at an increased speed and scale.

Key Google AutoML Tables features:

User-friendly Interface Automated Feature Engineering Integration with Google Cloud Scalability

The Collaboration Platform for API Development.

Key Postman features:

User-Friendly Interface Collaboration Comprehensive Testing Tools Extensive API Documentation

Open Source

SoapUI Pro is one of the most prominent API testing platforms around, allowing developers to quickly prototype the functions of their apps and get them to market with little hassle.

Key soapUI features:

Comprehensive Testing User-Friendly Interface Extensive Protocol Support Scripting Capability

Pingdom is a website performance monitoring software.

Key Website Speed Test by Pingdom features:

User-Friendly Interface Detailed Performance Metrics Geographical Testing Visual Representation

Google Cloud Translation lets you dynamically translate between languages using pre-trained or custom ML models based on your content needs.

Key Cloud Translation API features:

Scalability Language Support Real-Time Translation Integration

Amazon Elastic Transcoder is media transcoding in the cloud.

Key Amazon Elastic Transcoder features:

Scalability Integration with AWS Predefined Presets Pay-as-you-go Pricing