FedNow is the Federal Reserve’s real-time payment service. The shape is identical to RTP, plus an optional memo field for the receiver. The service caps FedNow at $10,000,000 per transfer (the current Fed limit).
POST /embedded-banking/v1/money-movements/fednow
Like RTP, FedNow is irrevocable: a duplicate send cannot be recalled. Always include an
idempotencyKey so a retried request returns the original transfer instead of moving the funds
twice. See idempotency.
FedNow and RTP are complementary; a given receiving bank may participate in one, both, or neither. Pick the rail by the receiver’s network participation, falling back to ACH when neither real-time rail is available.
Required scope: embedded:transfer:write and payment_rail:fednow.