Yes - adding your card is totally safe and secure. 

Our technology for adding your card is powered by Fidel API. Fidel takes a security-by-design approach, continuously investing in the technology, processes, and people needed to meet the highest security standards and stay ahead of evolving threats. 

If you have specific questions, please reach out to Fidel API at: security@fidelapi.com

Or find more information here: https://www.fidelapi.com/legal/security