List All Domains
Get the OMOP domain catalog. The result is wrapped under domains and the endpoint is not paginated server-side - the full ~20-row catalog comes back in a single call:
Include concept counts and stats:
Get Domain Concepts
Retrieve concepts within a specific domain. Wrapped under concepts; pagination on outer meta:
Filter by vocabulary:
Standard concepts only:
Include invalid / deprecated concepts:
Parameters
client.domains.list() returns the canonical OMOP domain catalog from GET /domains. The vocabulary-scoped version client.vocabularies.domains() queries GET /vocabularies/domains - different endpoint, different shape.