With new opportunities and challenges from additive manufacturing (AM), novel characterization approaches are needed to realize reliable and industry-transferrable material systems and processes. The Complex Scattering Program at the National Synchrotron Light Source II (NSLS-II), a Department of Energy (DOE) Office of Science User Research Facility located at Brookhaven National Laboratory, has capabilities on three beamlines to support in situ and operando soft material additive manufacturing measurements. These beamlines include: the Coherent Hard X-ray (CHX) beamline specializing in X-ray Photon Correlation Spectroscopy (XPCS), the Soft Matter Interfaces (SMI) and Complex Materials Scattering (CMS) beamlines specializing in time-resolved Small-Angle X-ray Scattering (SAXS) and Wide-Angle X-ray Scattering (WAXS) techniques. All three beamlines work in both transmission and grazing incidence geometries. Technical specifications for the beamlines are summarized in Table 1 with further details at https://www.bnl.gov/ps/beamlines/. In this article, we describe some of the additive manufacturing capabilities that have been implemented on these beamlines, including in-line 3D printers for Continuous-flow Direct Writing (CDW), Fused Filament Fabrication (FFF) printing, and an instrument for Electrospray Deposition (ESD). We also describe a development program in autonomous experimentation that will be critical for addressing the complexity involved in optimizing additive manufacturing processes and materials. These capabilities and approaches have been co-developed in partnership with Brookhaven’s Center for Functional Materials (CFN) as well as collaborative users from universities (Stony Brook and Yale University), government labs (Air Force Research Laboratory, National Institute of Standards and Technology, Lawrence Berkeley National Laboratory), and industry (Henkel Inc.).