Systems and methods are provided for a remotely-deployed, automated, computer network diagnostic tool. Methods may include deploying a diagnostic script from a central network node to multiple network endpoints via an automated network agent tool, and running the diagnostic script on each of the multiple endpoints. Running the script on each endpoint may include compiling a set of URLs, compiling a set of proxy servers, testing a plurality of network paths, and generating a set of diagnostic data for each endpoint. Diagnostic data may include a success status, a latency performance score, and a response size measurement. Methods may include collating the sets of diagnostic data, generated from the multiple endpoints, into a collated set of diagnostic data. Methods may include analyzing the collated set of diagnostic data, via a big-data analysis tool, based on a set of performance metrics. Based on the analyzing, methods may include generating a diagnostic network report, and/or a flag when a network performance issue is detected.