generated: '2026-07-11' method: derived source: openapi/basis-theory-openapi.yml summary: types: - apiKey api_key_in: - header schemes: - name: ApiKey type: apiKey in: header parameter: BT-API-KEY description: Authenticate every request with a Basis Theory Application key supplied in the BT-API-KEY request header. sources: - openapi/basis-theory-openapi.yml