Abstract: The present disclosure relates to gateway path variable detection for metric collection. In some embodiments, a gateway receives a plurality of requests from one or more clients, wherein each request of the plurality of requests is directed to a service and comprises a path. In some embodiments, the gateway separates the path of each request into one or more sub-paths and inserts nodes representing each sub-path into a tree hierarchically based on the path, excluding redundant nodes. If a node has a parent node in the tree, in some embodiments, the gateway determines whether a number of child nodes of the parent node exceeds a variance threshold and, if so, identifies the sub-path as a variable and collapses all nodes at the same level into one node representing the variable, inserting child nodes of collapsed nodes as child nodes of the one node, and removing redundant child nodes.