eCFR.io Federal Regulations
Search and read US federal regulations with legal and inline citations linking to ecfr.io.
| Endpoint | https://ecfr.io/mcp (streamable-http) |
|---|---|
| Registry version | 1.0.0 |
| Now | 3 tools · grade A (94) · pin ts_e61319e06fa79fdbe11d7e834d6a4a15 · protocol 2025-06-18 |
| First / last listed | 2026-11-05 02:03 UTC / 2026-11-05 02:03 UTC |
| Grade over time | 2026-11-05: A (94), 3 tools |
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Tools: search_regulations get_regulation list_titles
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 quotation, include the returned inlineCitation (Markdown link to ecfr.io), or legalCitation including its ecfr.io URL. Include bodyAsOf/sourceDate where relevant. Fetch the regulation before quoting a params: query*, limit |
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 regulatory claim or quotation, include the returned inlineCitation (Markdown link to ecfr.io), or legalCitation including its ecfr.io URL. Include bodyAsOf/sourceDate where relevant. Fetch the regulation befo params: path*, offset, length |
list_titles | List the CFR titles with source dates and canonical ecfr.io URLs. Browse children with get_regulation. params: none |
Entries describe changes in tool definitions. They are not statements about a server, its quality or its author. The grade measures how the tool definitions fit model providers (token cost, schema compatibility, confusable names) as scored by the ToolFit engine at the time of the listing. JSON: append .json. Opt-out: how or hello@youraitools.co.