Regulations.gov API
US Government Data Free key (no card)
AuthenticationFree key (no card)
Rate limit1,000 requests/hour with a registered key; 30/hour (50/day) with the shared DEMO_KEY.
Documentation: open.gsa.gov ยท Checked Sep 13, 2026
About
When federal agencies propose a new rule, they post the docket and invite public comments on Regulations.gov, and this API lets you search those documents and comments programmatically. You can find every comment submitted on a proposed rule, pull rule text, and monitor dockets over time. A free api.data.gov key gets you 1,000 requests an hour.
Details
Free to start. You may need a free key, but no credit card.
Auth: Free key (no card)
Rate limit: 1,000 requests/hour with a registered key; 30/hour (50/day) with the shared DEMO_KEY.
Verified: 2026-09-13
Best for: personal business developer
Setup
- Sign up for a free api.data.gov key and wait for the confirmation email.
- Search for a docket on regulations.gov to grab its ID.
- Call the /v4/comments or /v4/documents endpoint with filter parameters and your key.
- Step through pages of results to pull full comment sets.
Example
https://api.regulations.gov/v4/comments?filter[commentOnId]=0900006485cb5ec7&api_key=YOUR_KEYUse cases
- Monitor new rules affecting your industry and read what the public said
- Analyze public comment sentiment on a controversial proposed rule
- Build a watchlist app that emails you when a docket updates