If I understand this correctly, your clients are people like lenders (e.g someone who lends money to Uber drivers who want to buy a car) who need assurances about the their customer's status, e.g whether they truly were an Uber driver for the last 2 years.

So with your system the driver will supply you with their Uber credentials, and you will log into Ubers system on their behalf, extract key information such as the number of rides they have done, and pass that info back to your client. Like open banking as you say.

I hope I have that right, I initially thought that an API for payroll meant that you offered a service that paid people and handled taxes in Latin America. (Just my worldview since we are in the HR business). However I now understand that you are in fact an API to extract data from any number of payroll systems.

Just thought I would share that with you as I found it initially confusing, but that's probably on me, and your messaging may well be perfectly on target.

Good luck going forward and I hope for your success.