Federal law: US Code, CFR, public laws, bills and executive orders, cross-linked and versioned.
Maintain this server? Claim it
Call this server's tools from your browser. Nothing to install.
Requests go through mcptry because browsers can't call most MCP servers directly. Header values are sent to the server for that request only and are never stored or logged.
Tool list from our last check. Connect live to refresh it.
What cites a document: each corpus's citations of a code section, law, bill or order, with the words that cite it, and for a statute the regulations issued under it. Lists come 50 at a time; `list` and `offset` page through one.
One list only, by the corpus that cites.
A page of the site, as its path or full URL ("/usc/26/61", "/pl/119/21"). Give this or `citation`.
With `list`, where in it to start.
A citation ("26 U.S.C. 61(a)", "40 CFR 60.1", "Pub. L. 119-21", "H.R. 1", "E.O. 14000"). Give this or `path`.
This tool isn't marked read-only, so it may change something on the server or in an account you connected.
What cites a document: each corpus's citations of a code section, law, bill or order, with the words that cite it, and for a statute the regulations issued under it. Lists come 50 at a time; `list` and `offset` page through one.
| Argument | Type | Description |
|---|---|---|
| list | string | One list only, by the corpus that cites. |
| path | string | A page of the site, as its path or full URL ("/usc/26/61", "/pl/119/21"). Give this or `citation`. |
| offset | integer | With `list`, where in it to start. |
| citation | string | A citation ("26 U.S.C. 61(a)", "40 CFR 60.1", "Pub. L. 119-21", "H.R. 1", "E.O. 14000"). Give this or `path`. |
{
"type": "object",
"properties": {
"list": {
"enum": [
"code",
"cfr-citations",
"laws",
"bills",
"orders"
],
"type": "string",
"description": "One list only, by the corpus that cites."
},
"path": {
"type": "string",
"description": "A page of the site, as its path or full URL (\"/usc/26/61\", \"/pl/119/21\"). Give this or `citation`."
},
"offset": {
"type": "integer",
"default": 0,
"description": "With `list`, where in it to start."
},
"citation": {
"type": "string",
"description": "A citation (\"26 U.S.C. 61(a)\", \"40 CFR 60.1\", \"Pub. L. 119-21\", \"H.R. 1\", \"E.O. 14000\"). Give this or `path`."
}
}
}What changed in a code section between two releases: each provision added, removed, changed or renumbered, the edits marked <del> and <ins>. To compare versions of a bill, take the 'what changed' link from its history.
| Argument | Type | Description |
|---|---|---|
| to | string | Release point or date to compare to. Defaults to the latest. |
| from | string | Release point or date to compare from. Defaults to the release before `to`. |
| path | string | A page of the site, as its path or full URL ("/usc/26/61", "/pl/119/21"). Give this or `citation`. |
| citation | string | A citation ("26 U.S.C. 61(a)", "40 CFR 60.1", "Pub. L. 119-21", "H.R. 1", "E.O. 14000"). Give this or `path`. |
| only_edits | boolean | Only the provisions that changed, not the whole text. |
{
"type": "object",
"properties": {
"to": {
"type": "string",
"description": "Release point or date to compare to. Defaults to the latest."
},
"from": {
"type": "string",
"description": "Release point or date to compare from. Defaults to the release before `to`."
},
"path": {
"type": "string",
"description": "A page of the site, as its path or full URL (\"/usc/26/61\", \"/pl/119/21\"). Give this or `citation`."
},
"citation": {
"type": "string",
"description": "A citation (\"26 U.S.C. 61(a)\", \"40 CFR 60.1\", \"Pub. L. 119-21\", \"H.R. 1\", \"E.O. 14000\"). Give this or `path`."
},
"only_edits": {
"type": "boolean",
"default": true,
"description": "Only the provisions that changed, not the whole text."
}
}
}Read a document or page of the site as markdown: a code section with its notes, a title's or unit's contents, a public law, a bill (at any version), an executive order. Paths also reach the corpus indexes ("/usc", "/pl?congress=118", "/bills?congress=119", "/eo") and each code's releases ("/usc/releases"). Links in the markdown are paths this tool accepts.
| Argument | Type | Description |
|---|---|---|
| path | string | A page of the site, as its path or full URL ("/usc/26/61", "/pl/119/21"). Give this or `citation`. |
| notes | boolean | Include a section's source credit, notes and footnotes. |
| release | string | For a code, the release to read it at: a release point ("119-21") or a date (YYYY-MM-DD) for the release in force then. Defaults to the latest. |
| citation | string | A citation ("26 U.S.C. 61(a)", "40 CFR 60.1", "Pub. L. 119-21", "H.R. 1", "E.O. 14000"). Give this or `path`. |
| provision | string | Part of the document: in a code section, a provision and everything under it ("a-1" for (a)(1)) or a run of them ("a..c"); in a law, bill or order, a heading's {#anchor} ("tI-stA-s10101") or a provision under it ("tI-stA-s10101-a"). |
{
"type": "object",
"properties": {
"path": {
"type": "string",
"description": "A page of the site, as its path or full URL (\"/usc/26/61\", \"/pl/119/21\"). Give this or `citation`."
},
"notes": {
"type": "boolean",
"default": true,
"description": "Include a section's source credit, notes and footnotes."
},
"release": {
"type": "string",
"description": "For a code, the release to read it at: a release point (\"119-21\") or a date (YYYY-MM-DD) for the release in force then. Defaults to the latest."
},
"citation": {
"type": "string",
"description": "A citation (\"26 U.S.C. 61(a)\", \"40 CFR 60.1\", \"Pub. L. 119-21\", \"H.R. 1\", \"E.O. 14000\"). Give this or `path`."
},
"provision": {
"type": "string",
"description": "Part of the document: in a code section, a provision and everything under it (\"a-1\" for (a)(1)) or a run of them (\"a..c\"); in a law, bill or order, a heading's {#anchor} (\"tI-stA-s10101\") or a provision under it (\"tI-stA-s10101-a\")."
}
}
}How a document came to be: for a code section, the laws that enacted and amended it and every release that changed its text; for a law or bill, its legislative history, each version linked to its text and to what changed from the one before.
| Argument | Type | Description |
|---|---|---|
| path | string | A page of the site, as its path or full URL ("/usc/26/61", "/pl/119/21"). Give this or `citation`. |
| citation | string | A citation ("26 U.S.C. 61(a)", "40 CFR 60.1", "Pub. L. 119-21", "H.R. 1", "E.O. 14000"). Give this or `path`. |
{
"type": "object",
"properties": {
"path": {
"type": "string",
"description": "A page of the site, as its path or full URL (\"/usc/26/61\", \"/pl/119/21\"). Give this or `citation`."
},
"citation": {
"type": "string",
"description": "A citation (\"26 U.S.C. 61(a)\", \"40 CFR 60.1\", \"Pub. L. 119-21\", \"H.R. 1\", \"E.O. 14000\"). Give this or `path`."
}
}
}Search the full text of federal law: United States Code, Code of Federal Regulations, Public Laws, Congressional Bills, Executive Orders. Results are ranked across every corpus unless `corpus` narrows them, each with its citation, a link and the matching words. A query that is only a citation returns that document instead.
| Argument | Type | Description |
|---|---|---|
| date | string | For a code, search it as it stood on this date (YYYY-MM-DD). |
| page | integer | Page of results, 20 to a page. |
| query* | string | Words, a "quoted phrase", NOT before a word to exclude it, or a citation. |
| title | string | For a code, search one title ("11", "40"). |
| corpus | string | Search one corpus only. |
{
"type": "object",
"required": [
"query"
],
"properties": {
"date": {
"type": "string",
"description": "For a code, search it as it stood on this date (YYYY-MM-DD)."
},
"page": {
"type": "integer",
"default": 1,
"description": "Page of results, 20 to a page."
},
"query": {
"type": "string",
"description": "Words, a \"quoted phrase\", NOT before a word to exclude it, or a citation."
},
"title": {
"type": "string",
"description": "For a code, search one title (\"11\", \"40\")."
},
"corpus": {
"enum": [
"usc",
"cfr",
"pl",
"bills",
"eo"
],
"type": "string",
"description": "Search one corpus only."
}
}
}