One of the important objectives of the TDWG Biodiversity Services and Clients Interest Group (BSC,
http://www.tdwg.org/activities/biodiversity-services-clients/charter/) is to promote common service API design, documentation, and registration principles, which would greatly improve the interoperability of biodiversity web services and their applicability in workflow systems. To this end, the interest group compiles existing best practice documents and recommendations and assesses their applicability in the field of biodiversity informatics. This workshop will review and discuss the findings so far, identify missing components, and discuss a roadmap towards a TDWG Applicability Statement.