Independent, unofficial app developed by James Jenrette / 1102tools using public GSA per diem data. It is not affiliated with or endorsed by GSA or the U.S. government.
Look up CONUS lodging and meals-and-incidental-expenses rates by city, ZIP code, or state; see seasonal lodging and M&IE breakdowns; and estimate or compare travel per diem. Seven read-only tools provide source-backed rates and calculations. No user sign-in or API key is needed. Estimates exclude airfare and ground transportation. Verify the fiscal year, month, and work locality before using a rate.
How to use
- 1Add it in ChatGPT
Open GSA Per Diem by 1102tools in ChatGPT's Plugin directory (button above), select + to add it and sign in if asked.
- 2Use it in a chat
Type @ in the composer and pick GSA Per Diem by 1102tools, or start your message with its name. ChatGPT may also suggest it when it fits what you ask.
Things to ask
- “What is the federal per diem for Arlington, Virginia in November?”
- “Estimate per diem for a 3-night trip to Chester, Massachusetts in March.”
- “Compare per diem for Denver, Austin, and San Diego for FY2027.”
Disconnect
- 1Disconnect it in ChatGPT
Open Settings, then Apps or Plugins (the label depends on your rollout), select GSA Per Diem by 1102tools and choose Disconnect. ChatGPT stops acting through your account; past conversations aren't deleted.