Abstract: A federation management service may receive, via a user interface of the federation management service, a first user input indicating a selection of a testing environment for testing a federated application programming interface (API). The federation management service may receive, in response to the first user input, a portable binary file for deployment in a web browser of a client host. In some examples, the portable binary file may include a first set of scripts for orchestrating query requests for the federated API and a second set of scripts for orchestrating communications between the web browser of the client host and the first set of scripts. The federation management service may then execute, within the web browser of the client host, a query of the federated API using the first set of scripts and the second set of scripts.