Systems, methods, and media for optimizing and facilitating 3D printing services in a marketplace environment are provided. In one example, a system comprises a memory and at least one module, executing on one or more computer processors, to host or participate in a 3D printing service marketplace environment including marketplace participants and a federated network of 3D printing service providers. The at least one module receives a 3D printing request from a marketplace participant to print a 3D object at a 3D printing service provider, and communicates with at least some of the federated network of 3D printer service providers within the marketplace environment. In response to the received request, the at least one module lists at least some of the 3D printing service providers based on a 3D printer identifier metric.