understand and integrate the FDX API standard for financial data sharing

Steps

1. Review the FDX (Financial Data Exchange) API specification, which defines a RESTful, OAuth 2.0-based standard for consumer-permissioned financial data access; download the current spec from the FDX member portal or public GitHub repository.
2. Implement OAuth 2.0 with PKCE as the authorization mechanism; the FDX standard requires the data holder (bank) to present a consent screen and issue access tokens scoped to specific data clusters (e.g., ACCOUNT_DETAILED, TRANSACTIONS).
3. Call the FDX /accounts endpoint to retrieve account summaries and /accounts/{accountId}/transactions for transaction history; FDX defines standard field names and data types across institutions, reducing per-bank normalisation work.
4. Respect the FDX consent model: tokens are tied to specific data clusters and validity periods agreed to during consent; do not request data outside the consented clusters.
5. Implement a consent management interface that allows users to view and revoke their data-sharing consents; FDX requires data holders to support revocation, and your app should handle token revocation gracefully.
6. For production use, register with the relevant FDX ecosystem trust framework; access to FDX-compliant bank APIs may require certification or a bilateral agreement with each data holder.