Postman

Postman started as a way to send HTTP requests without writing a script and now covers collections, environments, mock servers, and automated test runs. For teams, the shared workspace and collection versioning are the real value, because an API's documentation tends to live wherever the requests do. The free tier is fine for individuals.

Where it falls short

The desktop app has become heavy, and the move toward cloud-synced workspaces has made some teams uneasy about where request data lives.

Alternatives in Developer Tools

• GitHub
  Where code lives, and increasingly where it ships.
• Visual Studio Code
  The editor most developers end up in.
• Vercel
  Deploy a frontend in one command, with previews for every branch.