Monitoring asynchronous transactions in a computing environment is disclosed. A first unique identifier is determined when a first method executes. The identifier is associated with an asynchronous transaction. A second unique identifier is determined when a second method executes. If it is determined that the first unique identifier and the second unique identifier match, then is it determined that the asynchronous transaction started with the first method and completed with the second method. In one embodiment, code that identifies a routine that has instructions for determining the first unique identifier at runtime is added to the first method, and code that identifies a routine that has instructions for determining the second unique identifier at runtime is added to the second method.