This is the Resource Identification Portal, supporting NIH's new guidelines for Rigor and Transparency in biomedical publications. Authors are instructed to authenticate key biological resources: Antibodies, Model Organisms, and Tools (software, databases, services), by finding or generating stable unique identifier named Research Resource Identifiers or RRIDs (Bandrowski et al., F1000Research 4:134, 2015). See also The Resource Identification Initiative Force 11 at: https://www.force11.org/group/resource-identification-initiative/. Registration not required.