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Payment rails run on an assumption so old it rarely gets named: the entity authorizing a transaction is a human being.
Account credentialing and fraud scoring both trace back to a cardholder or a registered business with a human accountable at the end of the chain. An AI agent acting autonomously has no assigned place in that structure.
It can be instructed to transact, but the infrastructure underneath was not written for a non-human principal.
San Francisco-based Natural is building that missing layer, and on July 20, 2026, the company announced a $30 million Series A led by Kirsten Green at Forerunner, with continued participation from all prior investors.
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