Search and trace US federal rules across the Federal Register, eCFR, and Regulations.gov.
Search and trace US federal rules across the Federal Register, eCFR, and Regulations.gov. Exposed over MCP by the federal mcp server, that capability becomes something an assistant can invoke while it works, not something you go and do afterwards.
Being a remote server, there is no local install. You register the endpoint with your client, authorise it once, and the tools appear.
Everything the assistant can do here goes through one of these:
regulations_search_rules — Federal Registerregulations_get_document — Federal Registerregulations_browse_cfr — eCFRregulations_get_cfr_section — eCFRregulations_get_docket — Regulations.govregulations_find_comments — Regulations.govregulations_list_open_comments — Federal Register (+ Reg.gov enrich)Prerequisites — The Prerequisites tool exposed by this serverInstallation — The Installation tool exposed by this serverYou will need 7 environment variables: MCP_TRANSPORT_TYPE, MCP_LOG_LEVEL, REGULATIONS_GOV_API_KEY, FEDERAL_REGISTER_BASE_URL, ECFR_BASE_URL, REGULATIONS_GOV_BASE_URL, ECFR_MIRROR_PATH. The server will not start without them, which is usually why the tools fail to appear on a first run. Keep credentials in your client's env block or a secrets manager rather than in a file you might commit.
regulations_get_docket, regulations_find_comments, and comment counts in regulations_list_open_comments). The Federal Register and eCFR tools need no key. The shared key allows 1,000 requests/hour.This sits in the file and storage access group, where several servers overlap in what they claim to do but differ sharply once you actually set them up. Federal's toolset — regulations_search_rules, regulations_get_document, regulations_browse_cfr and 6 more — is a fair guide to whether it matches your workflow. It is maintained by cyanheads; worth a glance at recent repository activity before you build anything load-bearing on it.
We check each listing at SyncDev against the project's documentation before it goes live — if something here drifts out of date, it is a bug worth reporting.
| Tool | What it does |
|---|---|
| regulations_search_rules | Federal Register |
| regulations_get_document | Federal Register |
| regulations_browse_cfr | eCFR |
| regulations_get_cfr_section | eCFR |
| regulations_get_docket | Regulations.gov |
| regulations_find_comments | Regulations.gov |
| regulations_list_open_comments | Federal Register (+ Reg.gov enrich) |
| Prerequisites | The Prerequisites tool exposed by this server. |
| Installation | The Installation tool exposed by this server. |
{
"mcpServers": {
"federal-regulations-mcp-server": {
"type": "streamable-http",
"url": "https://federal-regulations.caseyjhand.com/mcp"
}
}
}Configuration as documented by the project. Restart the client after saving.
regulations_get_docket, regulations_find_comments, and comment counts in regulations_list_open_comments). The Federal Register and eCFR tools need no key. The shared key allows 1,000 requests/hour.| Variable | Description | Required |
|---|---|---|
| MCP_TRANSPORT_TYPE | Configuration value read at startup. | Optional |
| MCP_LOG_LEVEL | Configuration value read at startup. | Optional |
| REGULATIONS_GOV_API_KEY | Credential the server authenticates with. | Yes |
| FEDERAL_REGISTER_BASE_URL | Endpoint or connection string the server talks to. | Yes |
| ECFR_BASE_URL | Endpoint or connection string the server talks to. | Yes |
| REGULATIONS_GOV_BASE_URL | Endpoint or connection string the server talks to. | Yes |
| ECFR_MIRROR_PATH | Filesystem location the server is allowed to use. | Optional |
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