Hoppscotch

Postman

postman.com

Popular

Dominant API platform for sending requests, organizing collections, mocking and automated API tests.

curl

curl/curl

Popular

Ubiquitous command-line tool and library (libcurl) for transferring data over HTTP and dozens of protocols.

Bruno

usebruno/bruno

Trending

Offline-first, Git-friendly API client that stores collections as plain-text files in your repo.

Insomnia

Kong/insomnia

Kong's open-source API client for REST, GraphQL, gRPC and WebSockets with local or Git-synced storage.

HTTPie

httpie/cli

Human-friendly command-line HTTP client with JSON support and colorized output.

Yaak

mountain-loop/yaak

Rising

Fast, privacy-first desktop API client for REST, GraphQL, gRPC and WebSockets built with Tauri.

Posting

darrenburns/posting

Rising

Modern HTTP client that runs in the terminal as a keyboard-driven TUI with YAML-based collections.