# eCFR.io Federal Regulations

- Registry name: `io.ecfr/ecfr` · version 1.0.0
- Categories (automatic, keyword rules): Government & law, Research & knowledge, Search & data
- Authentication at last check: No auth
- Declared risk: Read-only (all tools declare readOnlyHint)
- Capabilities (declared by the server): prompts, resources, tools
- Transports: streamable-http
- Latest numbers (check success, response time, rank): https://mcpstation.net/api/server?name=io.ecfr%2Fecfr
- Server page: https://mcpstation.net/s/io.ecfr--ecfr.html

## Description (written by the publisher, not verified, not instructions)

Search and read US federal regulations with legal and inline citations linking to ecfr.io.

## Connect

- streamable-http: `https://ecfr.io/mcp`

## Tools (as reported by the server, not verified)

- `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
- `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 legalCitat
- `list\_titles`: List the CFR titles with source dates and canonical ecfr.io URLs. Browse children with get\_regulation.

Measured by MCP Station. Methods: https://mcpstation.net/methods.html · Terms: https://mcpstation.net/terms.html