FOLIO mod-invoice
FOLIO mod-invoice module API, described in RAML (no OpenAPI published for this module). Interfaces: batch-group 1.1, batch-voucher.batch-voucher-exports 1.2, batch-voucher.batch-vouchers 2.0, batch-voucher.export-configurations 1.1, invoice 7.2, voucher 2.3, voucher-number 1.0. FOLIO is self-hosted: each library deployment exposes these endpoints through its own Okapi/Kong gateway URL.