ecfr_mcp_server_ecfr_search – 1 MCP server offers this tool
What it usually takes
agency_slugs– in 1 of 1date– in 1 of 1include_excerpts– in 1 of 1last_modified_after– in 1 of 1last_modified_before– in 1 of 1last_modified_on_or_after– in 1 of 1last_modified_on_or_before– in 1 of 1order– in 1 of 1page– in 1 of 1per_page– in 1 of 1query– in 1 of 1
No server marks it as only reading: treat it as able to change data.
From each publisher's own tool list. We never call a tool.
Servers
| Server | Inputs | Read-only? |
|---|---|---|
eCFR MCP Server co.huggingface.n8layman/ecfr-mcp-server Full-text search across the entire Code of Federal Regulations. START HERE for topic or concept questions. Returns sections ranked by relevance. For Uniform Guidance topics, use agency_slugs='office-of-management-and-budget'. Returns: JSON with search results including citations and source URLs. | agency_slugs,date,include_excerpts,last_modified_after,last_modified_before,last_modified_on_or_after,last_modified_on_or_before,order,page,per_page,query | Not stated |