Hi,
You can find the API colection of the external APIs of Tazapay here.
After importing the collection in postman; please make sure to update the values of secret_key and access_key.
You can find your secret_key and access_key in the core app (https://app.tazapay.com/) for Prod and (https://sandbox.tazapay.com/) for sandbox; under the API Keys section.
Note: Please do not share your secret and access keys!