Autonomous systems already make decisions, allocate resources, call APIs, negotiate with software, and initiate financial actions at machine speed. An autonomous agent, in the practical sense, is a software process that can commit to an action without a human approving each step in real time. That is already operational reality in logistics, procurement, software delivery, customer operations, trading, and service coordination.
What does not yet exist in mature form is financial infrastructure designed for that kind of participant.
An autonomous agent cannot satisfy the identity assumptions of correspondent banking. It cannot pause to navigate a compliance portal built for a human operator in a named jurisdiction. It cannot rely on a principal being reachable for every spend authorization. It requires bounded financial authority — defined in advance, verified by counterparties in advance, and enforced by the settlement layer itself at the moment value moves.
It also requires a different kind of credential. A credential from the past proves only that something was authorized once. An open computational economy needs proof of presence now: proof that the participant is not replaying old authority, but is actively operating in the present state of the network. Existing financial infrastructure was not designed to satisfy that.