A method for dynamic development of an application programming interface (API) including: receiving a first data file; generating an API configured to receive client data associated with a transaction message, where the generating the API includes: providing a data agnostic template; for each specific data parameter of the plurality of specific data parameters, assigning each template field with a corresponding specific data entry associated with the specific data parameter; and configuring a second user interface associated with the API by associating at least one display parameter with each specific data parameter of the plurality of specific data parameters; and displaying the second user interface such that a field displayed by the second user interface is configured to receive the data associated with each specific data parameter of the plurality of specific data parameters.