usebruno/bruno
Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)
What it is
Bruno is a new and innovative API client, aimed at revolutionizing the status quo represented by Postman and similar tools out there. Bruno stores your collections directly in a folder on your filesystem. We use a plain text markup language, Bru, to save information about API requests.
When to use it
Reach for bruno when you'd rather own a ready-made product (analytics, CMS, CRM…) than pay for SaaS — it's written in JavaScript and fits stacks tagged api-client, api-testing, automation, developer-tools.