FlowPay API (v2)
Second-generation FlowPay API published as OpenAPI 3.1.0 (2.0.0-alpha.4) in the public FlowPay/client-openapi GitHub repository, with operationIds, page/size pagination, documented 100 req/min and 10 req/s rate limits, and a shared public sandbox. Adds credit notes, proforma invoices, construction-site escrow flows, fee rules and KYC to the v1 surface, and describes an AIS consent-status webhook. The production server api.flowpay.it/v2 answers unauthenticated reads (GET /v2/banks returned 200 on 2026-09-17) even though the spec still labels it "Not implemented".