The Northrop AGM-137 was a missile developed by the United States of America.

The United States Air Force began developing the Tri-Service Standoff Attack Missile (TSSAM) in 1986; the intent was to produce a family of stealthy missiles for the Air Force, Navy and United States Army which would be capable of long range, autonomous guidance, automatic target recognition, and sufficient accuracy and warhead power to be capable of destroying well-protected structures either on land or at sea.

All versions of the missile would use inertial navigation aided by GPS. The Navy and one Air Force version were to use an imaging infrared terminal sensor to recognise the target and terminal homing, and would be fitted with a unitary warhead. A second version Army missile would be launched by two booster rockets and carry the Combined Effects Bomblet (CEB) submunition against land targets.

It was planned to carry the missile on the B-52H, F-16C/D, B-1, B-2, A-6E Intruder, and F/A-18C/D and Army version by MLRS (Multiple Launch Rocket System) vehicle.