eCFR (Code of Federal Regulations)
live GovernmentLegalUSeCFR: full-text search and browse all 50 titles of the US Code of Federal Regulations via the official eCFR API.
Tools
search_regulations Full-text search across all 50 titles of the US Code of Federal Regulations (federal agency regulations) via the official eCFR API. Returns matching sections with citation, heading, and excerpt. e.g.
No parameters required.
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list_titles List all 50 titles of the US Code of Federal Regulations (Title 1 General Provisions … Title 50 Wildlife and Fisheries), with currency dates. This is the index for the `title` filter in search_regulat
No parameters required.
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title_structure Get the top-level structure (chapters/subtitles) of one CFR title — the agencies and major divisions within that title. Returns a summarized one-level view, not the full deep tree. Keyless.
No parameters required.
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get_section_text Get the actual REGULATION TEXT of a specific CFR section — the full rule, not just a search excerpt. PREFER for "what does 14 CFR 91.113 say", "read the text of <citation>", "the exact wording of <reg
No parameters required.
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Test with curl
The gateway speaks JSON-RPC 2.0 over HTTP POST. You can test any pack directly from the terminal.
curl -X POST https://gateway.pipeworx.io/ecfr/mcp \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'curl -X POST https://gateway.pipeworx.io/ecfr/mcp \
-H "Content-Type: application/json" \
-d '{"jsonrpc":"2.0","id":2,"method":"tools/call","params":{"name":"search_regulations","arguments":{}}}'Use with the SDK
Install @pipeworx/sdk to call tools from any TypeScript/Node project.
import { Pipeworx } from '@pipeworx/sdk';
const px = new Pipeworx();
const result = await px.call("search_regulations", {});// Or ask in plain English:
const answer = await px.ask("ecfr: full-text search and browse all 50 titles of the us code of federal regulations via the official ecfr api");Related packs
Other Pipeworx packs in the same categories (Government, Legal, US):