List of some API Testing Tools

Some API Testing Tools:

Free & Paid:

• SOAPUI
• Postman
• Apigee
• Ping API
• HttpMaster: There are 2 editions -  Express edition is free & Professional edition is paid
• SOAP Sonar: There are 2 editions - Free Edition & Enterprise Edition (paid)

Free/Open source:

• Rest-assured
• JMeter
• Karate DSL
• Airborne
• Rest Console
• Hippie-Swagger

Commercial:

• SOAtest
• Unified Functional Testing (UFT) [Formerly QTP]
• Tricentis
• Pyresttest
• API Fortress
• vREST
• API Science
• APImetrics