Federal Register
Federal Register proposed and final rules, notices, executive orders, and FAR cases. 8 tools.
| Endpoint | https://federal-register.1102tools.com/mcp (streamable-http) |
|---|---|
| Registry version | 1.0.19 |
| Now | 8 tools · grade D (53) · pin ts_3d5ab281de5a4f006c3f6e153a4cb07f · protocol 2025-06-18 |
| First / last listed | 2026-10-26 04:48 UTC / 2026-10-26 04:48 UTC |
| Grade over time | 2026-10-26: D (53), 8 tools |
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Tools: search_documents get_document get_documents_batch get_facet_counts get_public_inspection list_agencies open_comment_periods far_case_history
search_documents | Search Federal Register documents.
Finds proposed rules, final rules, notices, and presidential documents
published in the Federal Register since 1994.
Key parameters:
- agencies: list of agency URL slugs (OR logic). Use list_agencies() to find slugs.
Common: 'defense-department', 'general-services-administration',
'small-business-administration', 'defense-acquisition params: agencies, doc_types, term, docket_id, regulation_id_number, pub_date_gte, pub_date_lte, comment_date_gte, comment_date_lte, effective_date_gte, effective_date_lte, correction, significant, cfr_title, cfr_part, presidential_document_type, executive_order_number, per_page, page, order, far_council |
get_document | Get full details for a single Federal Register document by number.
Returns all available fields including full text URLs, docket info,
RIN details, page views, topics, corrections, and CFR references.
Document numbers look like '2026-03065' (modern), 'E9-12940' or
'X94-70302' (legacy pre-2011 archive), or 'C1-2026-01234' (corrections).
params: document_number* |
get_documents_batch | Fetch multiple documents in one call (up to ~20).
Pass a list of document numbers to fetch up to about 20 in one call.
Always returns {count, results, [errors]}; errors.not_found lists any
requested numbers the API could not locate. Results come back in the
order requested. Image metadata (images, images_metadata) is left out
to keep batches small; get_document returns it.
params: document_numbers* |
get_facet_counts | Get document counts grouped by type, agency, topic, or time period.
Accepts the same filter conditions as search_documents. Returns
aggregated counts without individual document results.
Facets: type, agency, topic (categorical) plus daily, weekly, monthly,
quarterly, yearly (publication-date buckets, useful for trend lines).
Useful for understanding the volume of rulemaking params: facet*, agencies, doc_types, term, pub_date_gte, pub_date_lte, cfr_title, cfr_part, presidential_document_type |
get_public_inspection | Get current public inspection documents (pre-publication).
Public inspection documents are FR documents filed for publication but
not yet published. Updated business days only.
The current-PI endpoint does NOT support server-side filtering. This
tool fetches all current PI documents and filters client-side by
agency and/or keyword in the title.
Useful for getting early n params: agency_filter, keyword_filter, limit |
list_agencies | List agencies with their IDs, names, slugs, and parent agencies.
Use the 'slug' values with search_documents() and other tools.
Common procurement slugs:
- defense-department (DoD)
- general-services-administration (GSA)
- national-aeronautics-and-space-administration (NASA)
- defense-acquisition-regulations-system (DARS/DFARS)
- federal-procurement-policy-office (OFPP params: query, include_detail |
open_comment_periods | Find source-reported open comment periods, soonest indexed deadline first.
Covers proposed rules, notices, AND final/interim rules that accept
comments (dozens of RULE-type documents have open periods at any time).
Queries for comment close date >= today, scans up to 500 matching
documents oldest-published first (where the soonest deadlines live),
sorts by close date, and retu params: agencies, term, limit, far_council |
far_case_history | Get all Federal Register documents for a FAR/DFARS case or FAC.
Pass a docket ID like 'FAR Case 2023-008' (or a FAC number like
'FAC 2025-06'). Runs BOTH a docket-id search and a quoted full-text
search, then merges the two result sets (deduped by document number)
in chronological order to show the full rulemaking progression:
ANPRM -> proposed rule -> final rule -> correction params: docket_id* |
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