Hoppscotch : A free, online, open source API request builder
htty : htty is a console application for interacting with web servers. It’s a fun way to explore web APIs and to learn the ins and outs of HTTP.
gRPC : gRPC is a modern, open source remote procedure call (RPC) framework that can run anywhere. It enables client and server applications to communicate tr...
RSS Box : This app uses the API of other websites and gives you an RSS feed in return. Quick and simple.
BlurHash : BlurHash is a compact representation of a placeholder for an image.
Bluepine is a DSL for defining API Schema/Endpoint with the capabilities to generate Open API (v3) spec, validate API request and serialize object for API response based on single schema definition.