Application service provider featuring application programming interface (API) software; Authentication, issuance and validation of digital certificates; Computer programming of smart contracts on a blockchain; Computer security services in the nature of providing authentication, issuance, validation and revocation of digital certificates; Electronic storage of crypto tokens for others; Providing on-line non-downloadable computer software for use as a cryptocurrency wallet; Providing online non-downloadable computer software for minting non-fungible tokens (NFTs); Providing technology information in the field of cryptocurrency; Providing temporary use of on-line non-downloadable software for accessing, reading, and tracking information in the field of financial services on a blockchain; Providing user authentication services using blockchain-based software technology for cryptocurrency transactions