Palantir, the software company cofounded by Peter Thiel, is part of an effort by Elon Musk’s so-called Department of Government Efficiency (DOGE) to build a new “mega API” for accessing Internal Revenue Service records, IRS sources tell WIRED.

For the past three days, DOGE and a handful of Palantir representatives, along with dozens of career IRS engineers, have been collaborating to build a single API layer above all IRS databases at an event previously characterized to WIRED as a “hackathon,” sources tell WIRED. Palantir representatives have been onsite at the event this week, a source with direct knowledge tells WIRED.

APIs are application programming interfaces, which enable different applications to exchange data and could be used to move IRS data to the cloud and access it there. DOGE has expressed an interest in the API project possibly touching all IRS data, which includes taxpayer names, addresses, social security numbers, tax returns, and employment data. The IRS API layer could also allow someone to compare IRS data against interoperable datasets from other agencies.

Should this project move forward to completion, DOGE wants Palantir’s Foundry software to become the “read center of all IRS systems,” a source with direct knowledge tells WIRED, meaning anyone with access could view and have the ability to possibly alter all IRS data in one place. It’s not currently clear who would have access to this system.

Foundry is a Palantir platform that can organize, build apps, or run AI models on the underlying data. Once the data is organized and structured, Foundry’s “ontology” layer can generate APIs for faster connections and machine learning models. This would allow users to quickly query the software using artificial intelligence to sort through agency data, which would require the AI system to have access to this sensitive information.

Engineers tasked with finishing the API project are confident they can complete it in 30 days, a source with direct knowledge tells WIRED.

Palantir has made billions in government contracts. The company develops and maintains a variety of software tools for enterprise businesses and government, including Foundry and Gotham, a data-analytics tool primarily used in defense and intelligence. Palantir CEO Alex Karp recently referenced the “disruption” of DOGE’s cost-cutting initiatives and said, “Whatever is good for America will be good for Americans and very good for Palantir.” Former Palantir workers have also taken over key government IT and DOGE roles in recent months.

WIRED was the first to report that the IRS’s DOGE team was staging a “hackathon” in Washington, DC, this week to kick off the API project. The event started Tuesday morning and ended Thursday afternoon. A source in the room this week explained that the event was “very unstructured.” On Tuesday, engineers wandered around the room discussing how to accomplish DOGE’s goal.

The Treasury Department did not respond to a request for comment confirming Palantir’s role in the project.

“The Treasury Department is pleased to have gathered a team of long-time IRS engineers who have been identified as the most talented technical personnel. Through this coalition, they will streamline IRS systems to create the most efficient service for the American taxpayer,” a Treasury spokesperson tells WIRED. “This week, the team participated in the IRS Roadmapping Kickoff, a seminar of various strategy sessions, as they work diligently to create efficient systems. This new leadership and direction will maximize their capabilities and serve as the tech-enabled force multiplier that the IRS has needed for decades.”