Application service provider featuring application programming interface (API) software for the exchange of investment transaction data; Providing financial reporting services relating to custodial and trust accounts used for alternative investments including investments in digital assets; Providing investment and payment processing functionality for integration with investment portals and websites of others; Providing temporary use of a non-downloadable web application for electronic funds transfer processing for others; Providing temporary use of a non-downloadable web application for processing financial transactions and investments in alternative assets and digital assets through websites of others; Providing temporary use of a non-downloadable web application operated within websites of others for enabling creation of custodial and trust accounts for investing in securities, digital assets and alternative investments; Providing temporary use of non-downloadable software for financial institutions to accept electronic payments and investments from individual retirement accounts; Providing temporary use of non-downloadable software for online investment portals and cryptocurrency exchanges of others to accept and process investments from individual retirement accounts