42 Application programming interface (API) software for developers for use in creating, developing, managing, and analyzing data in the fields of distributed cryptographic systems, distributed ledgers, and decentralized networks; Application programming interface (API) software for use with decentralized applications for creating, developing, managing, and analyzing data on distributed cryptographic systems, distributed ledgers, and decentralized networks; Providing temporary use of on-line non-downloadable blockchain-based scalable software for development tools for developing, managing, deploying, and executing computer systems, computer applications, and application programming interfaces (API); Providing temporary use of on-line non-downloadable decentralized system based scalable software for development tools for developing, managing, deploying, and executing computer systems, computer applications, and application programming interfaces (API); Providing temporary use of on-line non-downloadable scalable software for developing, managing, deploying, and executing decentralized system based computer systems, computer applications, and application programming interfaces (API); Platform as a service (PAAS) featuring decentralized system based non-downloadable software for developing and managing computer applications, operating systems, and data; Platform as a service (PAAS) featuring non-downloadable software for developing and managing decentralized system based computer applications, operating systems, and data; Providing temporary use of non-downloadable decentralized system based software for accessing, viewing, sharing, creating, developing, managing, modifying, replicating, updating, using, linking, and virtualizing data over computer networks; Providing temporary use of on-line non-downloadable software in the nature of decentralized system based open source computing software for development, management, deployment, and execution of scalable computer services; Software as a service (SAAS) services featuring a virtual environment accessible via the Internet for the purpose of application development, deployment, execution, and management in the fields of distributed cryptographic systems, distributed ledgers, and decentralized networks; Providing temporary use of on-line non-downloadable cloud computing software for use in developing, managing, deploying, and executing decentralized system based computer programs; Scientific and technological services, namely, research and design in the field of scalable blockchain-based software architecture; Design and development of computer hardware and software; Information technology (IT) consultancy services