US federal rules taking effect is an MCP server with 5 tools an agent can call, among them get_rule, list_agencies, list_rules_amending_cfr_part. It answers at https://referencesource.org/mcp/rules over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 4 of 4 times since 23 September 2026; the last check, on 6 November 2026, succeeded.
Which published US federal rules take effect between two dates, and which CFR parts they amend?
Description as the publisher wrote it.
| Tool | What it does |
|---|---|
get_rule | Everything this register holds for one final rule: title, agency, effective date, the rule's own DATES paragraph, the CFR parts it amends, its publication date, a link to the rule on federalregister.gov, and a verbatim quote of the Federal Inputs: document_number |
list_agencies | Which agencies have rules coming? Returns each agency in this register with how many rules it has taking effect, the soonest and latest of those dates. Call it to get an agency name exactly as the Federal Register writes it before filtering Inputs: query |
list_rules_amending_cfr_part | Is anything changing in the part of the CFR I am subject to? Give a CFR title and part — "49 CFR 192", "40 CFR 52", "21 CFR 1308" — and get the already-published final rules that amend it, soonest effective date first, with each rule's DATE Inputs: cfr_part, from, limit |
list_rules_taking_effect | What lands on me, and when? Lists already-published US federal final rules whose effective date falls between two dates, soonest first, optionally from one agency. Each with the rule title, the agency, the CFR parts amended, the document nu Inputs: from, to, agency, limit |
verify_quote | Is this right? Check a claim about a final rule — its effective date, its agency, the CFR parts it amends — against the Federal Register record instead of trusting it. Says whether the claim matches a stored value, appears only in the verba Inputs: claimed_value, field, document_number |
Every block below points at https://referencesource.org/mcp/rules. Pick your client and copy.
claude mcp add --transport http us-federal-rules-taking-effect https://referencesource.org/mcp/rules
{
"mcpServers": {
"us-federal-rules-taking-effect": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://referencesource.org/mcp/rules"]
}
}
}{
"mcpServers": {
"us-federal-rules-taking-effect": {
"url": "https://referencesource.org/mcp/rules"
}
}
}{
"servers": {
"us-federal-rules-taking-effect": {
"type": "http",
"url": "https://referencesource.org/mcp/rules"
}
}
}{
"context_servers": {
"us-federal-rules-taking-effect": {
"url": "https://referencesource.org/mcp/rules"
}
}
}{
"mcpServers": {
"us-federal-rules-taking-effect": {
"serverUrl": "https://referencesource.org/mcp/rules"
}
}
}{
"mcpServers": {
"us-federal-rules-taking-effect": {
"url": "https://referencesource.org/mcp/rules"
}
}
}name: US federal rules taking effect
version: 0.0.1
schema: v1
mcpServers:
- name: US federal rules taking effect
type: streamable-http
url: https://referencesource.org/mcp/rules{
"mcpServers": {
"us-federal-rules-taking-effect": {
"httpUrl": "https://referencesource.org/mcp/rules"
}
}
}{
"mcpServers": {
"us-federal-rules-taking-effect": {
"type": "http",
"url": "https://referencesource.org/mcp/rules"
}
}
}{
"mcpServers": {
"us-federal-rules-taking-effect": {
"url": "https://referencesource.org/mcp/rules"
}
}
}goose://extension?url=https%3A%2F%2Freferencesource.org%2Fmcp%2Frules&type=streamable_http&id=us-federal-rules-taking-effect&name=US%20federal%20rules%20taking%20effect
It answered our last check on 6 November 2026 in 151 ms. Over 4 checks since 23 September 2026 it answered 4. Status here comes from Neuronto's own probes, not from the publisher.
5, as returned by the server's own tools/list on 12 November 2026: get_rule, list_agencies, list_rules_amending_cfr_part, list_rules_taking_effect, verify_quote.
It answered our last check on 6 November 2026 in 151 ms. Over 4 checks since 23 September 2026 it answered 4.
Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://referencesource.org/mcp/rules. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.
It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.
Publisher: io.github.joelp22-maker. Endpoint host: referencesource.org. ARD identifier: urn:air:io.github.joelp22-maker:mcp:referencesource-rules.
First indexed 21 September 2026. The tools are exactly what the server returned; nothing on this page
is inferred from its name. Ranking in Neuronto search is never for sale.