Postman is a GUI tool for sending web requests.

Download it from official website. Available for Windows, Linux, and macOS.

Here's how to use it:

  1. Click + on the tabs panel.
  2. Click on dropdown in front of URL field and choose POST.
  3. Paste Webhook URL in URL field.
  4. Click Body tab > raw > JSON from the dropdown.
  5. Paste the body below.
  6. Press Send.
  7. If status shows 204 No Content means request succeed!

postman example

Sending attachments

To send attachment(s):

  1. Switch from raw to form-data.
  2. Hover on key field, click on dropdown and choose File.
  3. Click Select Files and select file (despite it allowing you to choose multiple files, choose one).
  4. Repeat if you want to add more attachments.
  5. To add json to request add key with payload_json name and json body value (dropdown must say Text).

postman example