pycsw is an OGC API - Records and CSW server implementation written in Python.
pycsw fully implements the the OGC API - Records (OARec) standard and the OpenGIS Catalogue Service Implementation Specification (Catalogue Service for the Web). Initial development started in 2010 (more formally announced in 2011). The project is certified OGC Compliant, and is an OGC Reference Implementation. Since 2015, pycsw is an official OSGeo Project.
pycsw allows for the publishing and discovery of geospatial metadata via numerous APIs (OGC API - Records, CSW 2/CSW 3, OpenSearch, OAI-PMH, SRU). Existing repositories of geospatial metadata can also be exposed, providing a standards-based metadata and catalogue component of spatial data infrastructures.
pycsw is Open Source, released under an MIT license, and runs on all major platforms (Windows, Linux, Mac OS X).
Please read the docs at https://pycsw.org/docs for more information.