Best API Clients in 2026 · page 2
- 266.8Free plan
- 27
grpcui
grpcui is a free, open-source command-line tool for interacting with gRPC servers through a browser-based interface.
Free planWebLinuxmacOSSelf-hosted6.8Free plan - 28
Insomnium
Insomnium is a local desktop API client for testing REST, GraphQL, WebSockets, server-sent events, and gRPC.
Free planLinuxmacOSSelf-hostedWindows6.7Free plan - 29
RESTK
RESTK is a free desktop tool for building, testing, and debugging REST and GraphQL APIs on macOS and Windows.
Free planmacOSWindows6.7Free plan - 30
Restfox
Restfox is a free, open-source client for testing HTTP and socket connections, designed for web and desktop use.
Free planWebExtensionLinuxmacOS6.7Free plan - 31
NativeRest
LinuxmacOSWindows6.7$199 one-time - 32
Posting
Free planLinuxmacOSWindows6.4Free plan - 33
Restish
Free planLinuxmacOSSelf-hostedWindows6.3Free plan - 34
Refit
WebAPIWindows6.1 - 35
nasapower
Free planAPI5.9Free plan - 36
Karve
Windows5.8From $39.99 a month - 37
HTTP Prompt
LinuxmacOSWindows5.7 - 38
SPARQLWrapper
APILinux5.6