The informative endpoints all carry data points, but we also need endpoints that can be consumed by the frontend that modify or update data.
/market/items - Post a new item to the market. This is associated with a user's data./market/items/{id}/buy - Trigger a 'buy item' request. The headers that are associated with this are the users' information. It sends back a 200 OK along with confirmations that the payment has gone through./market/items/{id}/remove - Triggers a 'remove item' request. This should authenticate with the user to check if they are indeed the owner of the item.(taken from github/hackagotchi/backend#2)