Here is an API document, you can check all your required APIs (update the URLs based on whether you are working on demo or production)-

Demo - https://demo.procuredesk.com/api-docs/index.html

Credentials -
​Username: demo
​Password: Password@123

Production - https://myprocuredesk.com/api-docs/index.html
​
​Credentials -
​Username: username
​Password: password
​
First, you have to generate an auth_token, and then you can use the required APIs.
​
​Here are the steps -
​
1. Open this API document - https://myprocuredesk.com/api-docs/index.html
2. Update servers to "Demo host" and add this URL in the box - myprocuredesk.com
​

3. Click on this API endpoint - /api/authenticate
4. Add this in the Request Body -
​
​{
​"api_user": {
​"email": "email id", - Use your email id
​"password": "password" - Use your password
​}
​}
​

5. Click on exexcute.
6. Check the Response, copy the auth_token, and use this token in APISECRET for any APIs.