Adyen Management v3 payment methods, payout settings, split configuration, donation campaigns, and webhook administration without HMAC-secret generation. Generated from Adyen current official commit-pinned OpenAPI 3.1 source. Every mutation is grant-off, requires approval every run, and every admitted POST mutation requires a caller-owned idempotency key of at most 64 characters. Reads are uncached; the seven terminal-setting and payment-method reads whose official schemas can materialize passcodes or acquirer credentials are marked sensitive-read. Auth is connection-owned, pagination follows provider links or documented offsets, and no financial resource is misrepresented as a work-entity Source.