HTTPie for Terminal - Developers all around the world rely on HTTPie for API testing.
ReqRes - A hosted REST-API ready to respond to your AJAX requests.
Ping-API - Automated API testing and monitoring.
API Tester - API Tester is the first mobile app to test any type of API on the go. Including REST, GraphQL, WebSocket, SOAP, JSON RPC, XML, HTTP, HTTPS.
Runscope - Log, monitor and measure your API usage to solve API problems fast.
Albato - Connect 800+ apps or integrate new services to create use cases tailored to your needs. No matter the process, automate it with no-code.