Find the URL
Open Steam Inventory, choose Trade Offers, then select the option that shows who can send you Trade Offers. Copy the URL from the third-party sites section.
A valid Trade URL tells CSGOSMS which Steam account should receive an eligible purchase.
Open Steam Inventory, choose Trade Offers, then select the option that shows who can send you Trade Offers. Copy the URL from the third-party sites section.
Sign in to CSGOSMS and paste the complete URL into the Trade URL panel in My Account.
A valid address starts with https://steamcommunity.com/tradeoffer/new/ and contains both partner and token parameters.
If Steam creates a new token, update the saved URL before your next purchase.