Application service provider featuring application programming interface (API) software for user interface integration and developing customized cryptocurrency and blockchain trading orders, trading engines, and trading strategies; assistance in implementing and installing software by all communications means authentication of data in the field of financial transactions using blockchain technology; computer programming; design and development of computer software; electronic storage of cryptocurrency for others; maintenance of computer software; platform as a service (PAAS) featuring computer software platforms for user interface integration and developing customized cryptocurrency and blockchain trading orders, trading engines, and trading strategies; platform as a service (PAAS) featuring computer software platforms for allowing online peer-to-peer currency financial services, namely, for trading, lending, financing, and exchange of currency, digital currency, virtual currency, valuable tokens, and digital tokens; providing on-line non downloadable software for user interface integration and developing customized cryptocurrency and blockchain trading orders, trading engines, and trading strategies providing on-line non-downloadable software for generating cryptographic keys for receiving and spending cryptocurrency; providing temporary use of non-downloadable web-based decentralized applications (DAPPS) for cryptocurrency trading and exchange services; providing temporary use of on-line non-downloadable open-source toolkit software for user interface integration and developing customized cryptocurrency and blockchain trading orders, trading engines, and trading strategies; providing temporary use of online, non-downloadable currency exchange software; providing temporary use of online, non-downloadable currency trading software; providing temporary use of online, non-downloadable e-payment software in the field of payment transaction processing services; providing temporary use of online, non-downloadable financial exchange software; providing temporary use of online, non-downloadable payment software; providing temporary use of online, non-downloadable software for blockchain based financial platforms; providing temporary use of online, non-downloadable software for use in connection with digital currency, cryptocurrency, and virtual currency; providing temporary use of online, non-downloadable software for managing and verifying cryptocurrency transactions on a blockchain; providing temporary use of online, non-downloadable software for managing and verifying financial transactions; providing temporary use of online, non-downloadable software for managing cryptocurrency transactions using blockchain technology; providing temporary use of online, non-downloadable software for facilitating electronic, electronic wallet, cryptocurrency, non-fungible token, blockchain, bill, merchant, transaction, loyalty program, check, debit card, and credit card payments in the field of financial matters; providing temporary use of online, non-downloadable software for facilitating cryptocurrency payment transactions; providing temporary use of online, non-downloadable software for use in connection with digital currency, virtual currency, and cryptocurrency for payment transaction processing services; providing temporary use of online, non-downloadable software for use in electronically trading, storing, sending, receiving, accepting, and transmitting digital currency and cryptocurrency; providing temporary use of online, non-downloadable software for use in managing digital currency payment and exchange transactions; providing temporary use of on-line, non-downloadable software for processing electronic payments; providing temporary use of on-line, non-downloadable software for processing payment by cryptocurrency; providing temporary use of online, non-downloadable software platforms for financial transactions; providing temporary use of online, non-downloadable software relating to financial matters; providing temporary use of online, non-downloadable software relating to the handling of financial transactions; providing temporary use of online, non-downloadable software relating to the handling of financial transactions; providing user authentication services using blockchain-based software technology for cryptocurrency transactions; software integration; updating of computer software