Software application integration, including constructing an application integration adapter where the constructing is carried out in dependence upon a profile. The profile includes data describing the adapter. Embodiments include communicating integration messages among applications through the adapter. Profiles include identifications of at least two communications transports, including configuration parameters for the data communications transports. In typical embodiments, constructing an application integration adapter includes creating the transports identified in the adapter profile, and configuring the transports in accordance with the configuration parameters.