Overengineering

• insomnia

  225 33,036 9.7 JavaScript

  The open-source, cross-platform API client for GraphQL, REST, WebSockets, SSE and gRPC. With Cloud, Local and Git storage.

  

I think https://insomnia.rest is the most popular, its open source, but has paid functions.

• Postwoman

  212 59,976 9.6 TypeScript

  👽 Open source API development ecosystem - https://hoppscotch.io

  

I use Hoppscotch on the browser itself

• WorkOS

  workos.com sponsored

  The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

  

• httpie

  116 31,760 7.0 Python

  🥧 HTTPie CLI — modern, user-friendly command-line HTTP client for the API era. JSON support, colors, sessions, downloads, plugins & more. (by httpie)

  

HTTPie also just released a desktop app. It's a bit barebones so far, but has a nice clean UI, much nicer than postman https://httpie.io/

• nightingale-rest-api-client

  5 707 7.6 C#

  A modern, resource-efficient REST API client for Windows

  

I recommend https://nightingale.rest , is a native REST client for Windows, so if you like native applications this is for you.

• pipx

  38 8,785 9.2 Python

  Install and Run Python Applications in Isolated Environments

  

As they are Python, they are farily easily installable in user-space using pipx.

• InfluxDB

  www.influxdata.com sponsored

  Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

  

Suggest a related project