1. A database system for accessing one or more databases, aggregating attributes from the one or more databases, and generating and providing application programming interface (“API”) requests based on attributes, the database system comprising: one or more databases comprising a data structure comprising a plurality of data tables relationally linked by foreign keys, the data tables comprising: a user data table, a service provider data table, a third-party provider data table, a transaction data table, and a project data table, and a virtual computing environment comprising a plurality of software modules configured to interact with one another and with the one or more databases of the database system, wherein the virtual computing environment is in internet protocol communication with at least one external data source and computing devices of various entities, the various entities comprising: a first entity comprising a homeowner or user interesting in completing a project, a second entity comprising a contractor or service provider interested in performing services to the user to complete the project, and a plurality of third party providers comprising lenders and/or insurers interested in entering into a transaction with the user and the service provider to enable completion of the project, wherein the plurality of modules of the virtual computing environment are configured to interact with one another and with the one or more databases, the plurality of modules comprising: an interface module for providing a graphical user interface to computing devices of the user and the service provider; an API request data aggregation module for aggregating data from the one or more databases to prepare a plurality of API requests to the computing devices of the plurality of third-party service providers; an API request format generation module for converting each API request from among the plurality of API requests into a specific customized API format requested by each respective third-party provider, wherein data is received in a common format and converted into customized API requests; an API interaction module for communicating each specific customized API request to each respective computing device of the third-party providers and receiving API responses from respective computing devices of the third-party providers; an API response format standardization module for converting respective API responses into the common format; and an API response aggregation module for aggregating the API responses from the third-party providers and updating the one or more databases; wherein the project data table comprises unique identifiers for identifying a specific user and service provider associated with the project; wherein the data tables are maintained in a common format specific to the database system and not to the API format of the third party providers; and a computer readable storage medium having program instructions embodied therewith; and one or more processors configured to execute the program instructions to cause the database system to: identify, in the one or more databases, at least the user and the service provider associated with the project; access, from the one or more databases, a first set of attributes associated with the user, wherein the attributes comprise identification information and financial information associated with the user in the user data table; access, from the one or more databases, a second set of attributes associated with the service provider, wherein the attributes comprise at least identification information associated with the service provider in the service provider data table; access, from the one or more databases, a third set of attributes associated with the project, wherein the attributes comprise project information, user information, and service provider information associated with the project in the project data table; aggregate, using the API request data aggregation module, the first, second, and third sets of attributes into an aggregate set of attributes; determine, using the API request data aggregation module and based at least in part on the aggregate set of attributes, two or more third-party providers to which to send API requests; generate, using the API request format generation module, for each of the two or more third-party providers, respective customized API requests based on respective application programming interface formats associated with the two or more third-party providers; provide, using the API interaction module, the API requests to computing devices of the two or more third-party providers; receive, at the API interaction module, one or more API responses from at least some of the two or more third-party providers, wherein each of the AIP responses is associated with respective unique transaction identifiers; and in response to receiving, at the API interaction module, the one or more API responses from the at least some of the two or more third-party providers: analyze, using the API request data aggregation module and/or the API response format standardization module, the one or more API responses to determine whether the one or more API responses satisfy one or more criteria, wherein each API response comprises a proposed transaction for lending or insurance, each transaction being identified by the respective unique transaction identifiers; convert, using the API response format standardization module, each of the one or more API responses into respective standardized API responses based on the common format; and generate, using the user and service provider interaction module, user interface data configured for rendering a user interface, wherein the user interface includes indications of the one or more proposed transactions including one or more items of information from the associated standardized API responses.