Official MCP RegistryListed
org.billcommons/bill-commons
Search 209k+ US state bills, all 50 states + DC: full text, sponsors, votes, status. Free.
First seen 2 Oct 2026. Evidence as of 7 Oct 2026.
10
Tools
From an anonymous probe
1
Source listings
Each with its own history
1
Recorded changes
Since first seen
Tools
| Tool | Description | Behaviour |
|---|---|---|
| build_legislative_evidence_packet | Compile a citation-ready evidence packet for a bill: full official record, legislative history timeline, votes with member-level detail, and hearings -- each explicitly labeled official vs. derived with source URLs. Returns a `how_to_cite` block with a one-line `cite_as` sentence, a human `permalink`, a JSON `download_url`, and a `snapshot_id` that changes if and only if a cited fact about the bill changes -- so a reader can check later whether the citation still holds. Snapshots are NOT archived; the id is a change detector, not a way to retrieve an older packet. Pass `question` to record what the packet was assembled to answer; it is echoed into the artifact so a filed packet carries its own scope. | Read-only |
| compare_bill_versions | Deterministic diff (unified + structured) between two versions of a bill's extracted text. Defaults to earliest vs. latest texted version if version ids are omitted. Errors if fewer than 2 versions have extracted text. Result is labeled 'derived' (computed by Bill Commons, not an official document). | Read-only |
| find_similar_bills | Find bills with similar titles via deterministic trigram similarity, across jurisdictions. Labeled 'derived' -- not an official cross-reference or companion-bill designation. | Read-only |
| get_active_sessions | List legislative sessions currently flagged active, optionally filtered by jurisdiction (two-letter state code or name). | Read-only |
| get_bill_record | Fetch the full record for one bill: metadata, sponsors, subjects, actions, versions, and vote-event summaries. Look up by canonical bill_id (UUID), or by jurisdiction + identifier (+ optional session to disambiguate). For a human bill number like HB 123, use jurisdiction="NC", identifier="HB 123"; bill_id is for UUIDs. | Read-only |
| get_jurisdiction_coverage | Return the jurisdiction_coverage state-machine status for one state (abbreviation or name), or the full stored coverage matrix if state is omitted. Public-registry and unlisted row counts are explicit. Includes bounded retained official-source observation health and evidence links. Coverage status measures stored bill/text availability; local coverage timestamps can advance on count recomputation. Statewide semantic freshness remains unverified, including for GREEN coverage. | Read-only |
| get_vote_details | Fetch vote event(s) with member-level (yes/no/other/absent) vote records. Provide vote_event_id for one vote, or bill_id for all recorded votes on that bill. | Read-only |
| list_topics | List Bill Commons' curated cross-state topic trackers (e.g. artificial intelligence, youth online safety, platform accountability, cybersecurity, cryptocurrency, data privacy, local government & preemption) -- the entry point for "what subjects does Bill Commons track across all 50 states + DC" and "how do I get every bill in one". Each topic is a title/subject membership rule tuned for precision over recall, with a live bill_count and how_to_fetch_bills. This tool does not itself return bill rows -- pair it with search_legislation or the REST API's /topics/{slug} for the bills. | Read-only |
| search_legislation | Search FULL BILL TEXT -- not just known-bill-number lookup. `q` is matched against titles, descriptions, AND ingested document text via Postgres websearch_to_tsquery (supports "quoted phrases", OR, and -exclusion, same syntax as a search engine), with a fuzzy pg_trgm title-similarity fallback when the exact query has no hits. `q` can ALSO be a bill number ("HB 123", "H.B. 123", "hb123" all match) and that fast path is tried first. Optionally filter by jurisdiction (two-letter state code or name), chamber, and status. For a curated cross-state slice of a subject (e.g. "every AI bill in the country") rather than an ad-hoc keyword search, call list_topics first -- its membership rules also match on structured subject tags this full-text search does not see. | Read-only |
| trace_legislative_history | Full chronological legislative history for a bill: merged timeline of actions, version publications, and votes, plus related-bill links. | Read-only |
Change history
- get_jurisdiction_coverage: description changed (+"stored" +"Public-registry and unlisted row counts are explicit. Includes bounded retained official-source observation health and evidence links. Coverage status measures stored bill/text availability; local coverage timestamps can advance on count recomputation. Statewide semantic freshness remains unverified, including for GREEN coverage." -"51-jurisdiction")
| Source | Listing | First seen | Last seen | Versions |
|---|---|---|---|---|
| Official MCP Registry | org.billcommons/bill-commons | 2 Oct 2026 | 7 Oct 2026 | 1 |