Best API Tools in 2026

The Collaboration Platform for API Development.

Key Postman features:

User-Friendly Interface Collaboration Comprehensive Testing Tools Extensive API Documentation

Open Source

ZeroTwo is a premium multi-provider AI platform which combines the tools models and features of Claude, Gemini, Grok, Openai and more into one. Canvas, Deep Research, MCP, Connectors, Agents, Projects and even Apps are all available in one place!

Key ZeroTwo AI features:

Versatility Accessibility Natural Language Understanding Tools

Try for free freemium $19.99 / Monthly (Pro Account)

Connect the apps you use everyday to automate your work and be more productive. 1000+ apps and easy integrations - get started in minutes.

Key Zapier features:

Ease of Use Wide Range of Integrations Custom Automation Scalability

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

Anypoint Platform is a unified, highly productive, hybrid integration platform that creates an application network of apps, data and devices with API-led connectivity.

Key MuleSoft Anypoint Platform features:

Comprehensive Integration User-friendly Interface Scalability Robust Security

The #1 Integration Cloud - Build Integrations anytime, anywhere with no coding required using Dell Boomi's industry leading iPaaS platform.

Key Boomi features:

Comprehensive Integration Platform Ease of Use Scalability Hybrid and Multi-Cloud Support

Create, publish, maintain, monitor, and secure APIs at any scale.

Key Amazon API Gateway features:

Scalability Ease of Integration Built-in Security Monitoring and Logging

Intelligent and complete API platform.

Key Apigee features:

Robust API Management Security Features Scalability Analytics and Monitoring

Paw is a REST client for Mac.

Key RapidAPI for Mac features:

User Interface Team Collaboration Advanced Request Capabilities Extensions and Plugins

Open source API development ecosystem.

Key Hoppscotch features:

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

Open Source freemium

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

IFTTT puts the internet to work for you. Create simple connections between the products you use every day.

Key ifttt features:

Ease of Use Wide Range of Services Customization Pre-built Applets

DreamFactory is an API management platform used to generate, secure, document, and extend APIs.

Key DreamFactory features:

Ease of Use Automatic API Generation Wide Database Support Scalability

Open Source freemium

API marketplace for finding and connecting to the world's top APIs.

Key RapidAPI features:

Wide Variety of APIs Unified Billing Ease of Integration Testing Environment