eCFR · Rate Limits

Ecfr Rate Limits

The eCFR API is a free government service. While no formal rate limit policy is published, the API enforces automated scraping restrictions via IP-based blocking. Direct API access is permitted and encouraged as the recommended alternative to web scraping. No authentication or API key is required.

Ecfr Rate Limits is the machine-readable rate-limit profile for eCFR on the APIs.io network, conforming to the API Commons Rate Limits specification.

It captures 1 rate-limit definition.

Tagged areas include Federal Regulations, Government, Legal, Compliance, and Open Data.

1 Limits
Federal RegulationsGovernmentLegalComplianceOpen DataUnited States

Limits

Public API Access
Automated scraping of the ecfr.gov website is restricted and may redirect to unblock.federalregister.govREST API endpoints at www.ecfr.gov/api/* are freely accessible without authenticationNo API key or registration requiredResponse headers do not include rate limit headers (X-RateLimit-Limit, X-RateLimit-Remaining)Large content responses (full title XML) may be cached via CDN (age header present in responses)Good-faith reasonable use is expected for a government public service

Work with this as data

Every rate limit here is available over the APIs.io API and to AI agents over MCP.

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Tools for rate limits

4 MCP tools reach this
  • find_rate_limitsBrowse and filter every rate limit in the catalog.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools

Call it yourself

curl for this page
This rate limit 
curl "https://apis.io/api/v1/rate-limits/ecfr-rate-limits"
All rate limits 
curl "https://apis.io/api/v1/rate-limits?limit=25"

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