The offline, Git-native API workspace.
Database systems workbench for 30+ engines with terminals, SFTP, Docker, Kubernetes, and an API client
API Test Client
Free, open source, git-native API client. A local-first Postman alternative with a built-in MCP server.
Restfox
Open-source API client with a native C++ load-testing engine - Postman-style requests and k6-level load tests in one local app.
Interactive multi-protocol API browser and CLI for .NET — gRPC, REST, GraphQL, SignalR, MCP, SSE, WebSocket, MQTT, Socket.IO, OData, Surgewave, Kafka, DIS, UDP.
An open-source Postman-style API client and JMeter-style load testing desktop app.