Digital platforms often start with one provider and quickly discover that the first integration becomes part of the product itself. Nexus takes the opposite approach: provider-specific credentials, signatures, response formats and webhooks belong in adapters, while the ledger and transaction lifecycle stay provider-neutral.
That separation allows a platform to add, replace or route providers without changing the financial authority underneath. It also makes reconciliation and audit easier because provider events are normalized before they affect internal balances.
For regulated or higher-risk verticals, this architecture does not replace provider approval. It makes the approved integration easier to control, test and audit.