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How can users access Federal Register or eCFR data through official APIs?
If FederalRegister.gov or eCFR.gov blocks a request as automated, the page points users toward official developer API documentation rather than scraping the sites directly.
The direct answer
The confirmed instruction is to use the official API documentation for the relevant site:
- FederalRegister.gov API documentation for Federal Register access
- eCFR.gov API documentation for eCFR access
The access page says these sites limit programmatic access because of aggressive automated scraping. Using the official APIs is the route the page identifies for developer-style access.
What the page does not provide
The provided context does not include API endpoints, authentication rules, rate limits, sample code, or registration steps. Those details would need to come from the official API documentation itself.
What to do if you are just trying to read the page
If you are a human user and your request was flagged, the page asks you to complete a CAPTCHA and request access. The site may ask again later as part of its security measures.
Because access rules can change, check the current FederalRegister.gov or eCFR.gov instructions before building an automated workflow around them.
What should a human user do if FederalRegister.gov flags their request as automated?
When FederalRegister.gov flags a request as potentially automated, the page gives human users a simple next step: complete the CAPTCHA and request access.
What a human user should do
The page says human users should complete the CAPTCHA and request access. That is the confirmed path when the site thinks a request may be automated.
This does not mean the user did anything wrong. The page says FederalRegister.gov and eCFR.gov limit programmatic access because of aggressive automated scraping, so some requests may trigger security checks.
If you need programmatic access
For automated or developer use, the page directs users to the official API documentation for FederalRegister.gov or eCFR.gov. The provided context does not include the API setup steps, so those should be checked in the official documentation.
Why it may happen again
The access page also says a user may sometimes need to complete the CAPTCHA again as part of the site’s security measures. If the process changes, rely on the instructions shown on the current access page.
Why might FederalRegister.gov ask users to complete a CAPTCHA again?
FederalRegister.gov may ask for another CAPTCHA because the site uses repeated checks as part of its security measures.
Why the CAPTCHA may repeat
The access-request page says users may sometimes need to complete the CAPTCHA again. The stated reason is site security.
The same page also explains that FederalRegister.gov and eCFR.gov limit programmatic access because of aggressive automated scraping. A request flagged as potentially automated can lead to the access-request page.
What users can do
If you are browsing as a human user, follow the page’s instruction to complete the CAPTCHA and request access.
If you are trying to collect data through code, the page points users to official FederalRegister.gov API documentation or eCFR.gov API documentation instead.
What is not confirmed
The context does not say exactly what triggers a repeated CAPTCHA, how long access lasts, or whether a specific browser setting causes it. For current access behavior, follow the instructions shown on the Federal Register page itself.
Sources / Learn more
Related reading
- What should a reader do if the supplied Federal Register page does not show the qualified opportunity zone reporting details?; How can programmatic users access FederalRegister.gov or eCFR.gov material when automated-looking access is limited?
- How can a reader get past the Federal Register access notice to view the DFARS information collection item?; Why might FederalRegister.gov ask for repeated CAPTCHA checks when viewing DFARS materials?; Where should developers look for approved programmatic access to DFARS-related Federal Register or eCFR materials?
- What should I do if the Federal Register notice page for FAR Part 11 Requirements shows an access-limit or CAPTCHA message?; How can human users request access when FederalRegister.gov flags a request as potentially automated?
- How can programmatic users access Federal Register or eCFR material without triggering automated-request restrictions?; What should a human visitor do if FederalRegister.gov or eCFR.gov shows an access-block or CAPTCHA message?