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Congress.gov (BYOK) — connector documentation

  • MCP endpoint: https://byok-congress.connectorbay.com/mcp
  • REST API: POST https://byok-congress.connectorbay.com/v1/tools/{tool_name}, described by the OpenAPI 3.1 spec at https://byok-congress.connectorbay.com/openapi.json
  • Transport: Streamable HTTP, stateless, MCP specification 2025-06-18 or later
  • Authentication: your own Congress.gov api.data.gov API key for Congress.gov, sent in the X-Upstream-Key header of every request (never stored, logged or cached)
  • Health: https://byok-congress.connectorbay.com/health · Tool schemas: https://byok-congress.connectorbay.com/tools.json
  • Publisher: Unify Dynamics LLC · connectorbay.com/byok-congress · agent@connectorbay.com

What Congress.gov (BYOK) is for

Congress.gov (BYOK) lets an AI assistant read your own Congress.gov data through the Congress.gov API with a key you supply (api.data.gov API key for Congress.gov). Read-only: 11 tools (list_recent_bills, list_bills_by_type, get_bill, list_bill_actions, list_bill_cosponsors, get_bill_summaries, list_amendments, list_members, get_member, list_member_sponsored_bills, list_committees). The BYOK key travels with each request, is used for that one call only and is never stored, logged or cached; it is only ever sent to api.congress.gov. Unofficial connector by Unify Dynamics LLC: not affiliated with, endorsed by or sponsored by Congress.gov. Congress.gov and its logos are trademarks of their owners and are used only to say which service the connector works with.

Ask your assistant things like:

  • "What bills in Congress had action most recently?"
  • "List the Senate bills (type s) of the 119th Congress"
  • "Show details of H.R. 3076 in the 117th Congress"
  • "What actions have been taken on H.R. 3076 of the 117th Congress?"
  • "Who cosponsored S. 3580 in the 117th Congress?"
  • "Summarize H.R. 3076 of the 117th Congress"

What it does

  • list_recent_bills: List bills and resolutions across all Congresses, ordered by date of latest action, with type, number, title, chamber and latest action. Optionally limit by update time.
  • list_bills_by_type: List the bills of one type (for example hr or s) in one Congress, with number, title, origin chamber and latest action.
  • get_bill: Get one bill: title, sponsors, introduced date, origin chamber, policy area, latest action and the counts of actions, committees, cosponsors and amendments.
  • list_bill_actions: List the legislative actions taken on a bill (introduced, referred, passed, signed ...) with date, text and type.
  • list_bill_cosponsors: List the cosponsors of a bill with name, party, state, district, sponsorship date and whether they were an original cosponsor.
  • get_bill_summaries: List the Congressional Research Service summaries of a bill, one per version, with action date, description and summary text (HTML).
  • list_amendments: List amendments filed in one Congress, with type, number, purpose and latest action.
  • list_members: List members of Congress with Bioguide id, name, party, state, district and terms of service. Set current_member to true for sitting members only.
  • get_member: Get one member of Congress by Bioguide id: name, birth year, party history, terms served and counts of sponsored and cosponsored bills.
  • list_member_sponsored_bills: List the bills and resolutions a member sponsored, with Congress, number, title, introduced date, policy area and latest action.
  • list_committees: List the committees and subcommittees of one chamber in one Congress, with system code, name, type and parent committee.

BYOK key

You bring your own Congress.gov api.data.gov API key for Congress.gov (https://api.congress.gov/sign-up/). Your assistant sends it in the X-Upstream-Key header with each request. ConnectorBay uses it for that one call only: it is never stored, logged or cached, never shown in an answer, and it is only sent to api.congress.gov over https, with no redirects followed. Create a key with the fewest permissions the tools need (read-only if the provider offers it), and revoke it at the provider whenever you like.

Data sources

Live from the Congress.gov API (api.congress.gov) with a BYOK key; documentation: https://github.com/LibraryOfCongress/api.congress.gov. Endpoints checked against that documentation on 2026-10-16.

What it is not

Unofficial connector by Unify Dynamics LLC: not affiliated with, endorsed by or sponsored by Congress.gov. Congress.gov and its logos are trademarks of their owners and are used only to say which service the connector works with. It is read-only: it never creates, changes, sends or deletes anything in your Congress.gov account.

Built for: Worldwide. Languages: English.