eCFR.io Federal Regulations
io.ecfr/ecfr
Search and read US federal regulations with legal and inline citations linking to ecfr.io.
This endpoint completed initialize and tools/list. No tool was called.
- Rank
- #1558
- Score
- 82
- Tool tokens
- 804
- Tools
- 3
Tools
Token cost is the o200k count of the tools list JSON, including schemas, before any tool is called.
search_regulations
Search current US CFR text or a citation such as 31 CFR 10.1. Returns snippets and legal/inline citations with ecfr.io links. Fetch matching regulations before quoting. For every regulatory claim or q
get_regulation
Retrieve regulation text and child links by canonical path returned by search, e.g. /Title-31/Section-10.1. Inspect dates and stale flags. Follow nextOffset until null for all text. For every regulato
list_titles
List the CFR titles with source dates and canonical ecfr.io URLs. Browse children with get_regulation.
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