Postman - The Collaboration Platform for API Development
CloudSight - Image recognition API; send an HTTP request with an image, get a description of contents.
Thunder Client - Rest API client for VS Code, lightweight Postman alternative
Flico - Add visual search to your Chrome browser
Swagger Inspector - Free online tool to test APIs and autogenerate documentation
Google Vision AI - Cloud Vision API provides a comprehensive set of capabilities including object detection, ocr, explicit content, face, logo, and landmark detection.