UK Parliament Bills MCP Server

Summary

This MCP server provides structured access to UK Parliament Bills data using the Model Context Protocol. It enables AI agents to query bills, stages, publications, amendments, and RSS feeds through reliable tools and an API-backed data source. Developers can integrate the MCP server into local workflows or automation pipelines using stdio transport, while preserving upstream API responses. The server exposes tools for search, lookup, and publication retrieval, optimized for AI agents and MCP-compatible clients.

Features

• Search and retrieve Bills, stages, publications, and sittings from the UK Parliament Bills API.
• Access amendments and ping-pong items with structured parameters and enum validation.
• Provide RSS feeds for all, public, or private bills as raw text payloads.
• Preserve upstream JSON payloads in a consistent response envelope for downstream tools and AI agents.

Available Tools

search_bill_stage_amendments

Returns a list of amendments for a Bill stage.

Parameters:

• billId (number, path) – Bill ID.
• billStageId (number, path) – Bill stage ID.
• SearchTerm (string, query) – Optional text search.
• AmendmentNumber (string, query) – Optional amendment number.
• Decision (string, query) – Optional decision enum.
• MemberId (number, query) – Optional member ID.
• Skip (number, query) – Optional offset.
• Take (number, query) – Optional limit.

get_bill_stage_amendment

Returns a specific amendment for a Bill stage.

Parameters:

• billId (number, path) – Bill ID.
• billStageId (number, path) – Bill stage ID.
• amendmentId (number, path) – Amendment ID.

list_bill_news_articles

Returns news articles for a Bill.

Parameters:

• billId (number, path) – Bill ID.
• Skip (number, query) – Optional offset.
• Take (number, query) – Optional limit.

list_bill_types

Returns a list of Bill types.

Parameters:

• Category (string, query) – Optional category enum.
• Skip (number, query) – Optional offset.
• Take (number, query) – Optional limit.

search_bills

Returns a list of Bills matching filters.

Parameters:

• SearchTerm (string, query) – Optional text search.
• Session (number, query) – Optional session number.
• CurrentHouse (string, query) – Optional house enum.
• OriginatingHouse (string, query) – Optional house enum.
• MemberId (number, query) – Optional member ID.
• DepartmentId (number, query) – Optional department ID.
• BillStage (array:number, query) – Optional bill stage IDs.
• BillStagesExcluded (array:number, query) – Optional excluded stage IDs.
• IsDefeated (boolean, query) – Optional defeated filter.
• IsWithdrawn (boolean, query) – Optional withdrawn filter.
• BillType (array:number, query) – Optional bill type IDs.
• SortOrder (string, query) – Optional sort order enum.
• BillIds (array:number, query) – Optional bill IDs.
• IsInAmendableStage (boolean, query) – Optional amendable stage filter.
• Skip (number, query) – Optional offset.
• Take (number, query) – Optional limit.

get_bill

Returns a Bill.

Parameters:

• billId (number, path) – Bill ID.

get_bill_stage_details

Returns a Bill stage.

Parameters:

• billId (number, path) – Bill ID.
• billStageId (number, path) – Bill stage ID.

list_bill_stages

Returns all Bill stages for a Bill.

Parameters:

• billId (number, path) – Bill ID.
• Skip (number, query) – Optional offset.
• Take (number, query) – Optional limit.

get_publication_document

Returns information on a publication document.

Parameters:

• publicationId (number, path) – Publication ID.
• documentId (number, path) – Document ID.

download_publication_document

Returns a publication document payload.

Parameters:

• publicationId (number, path) – Publication ID.
• documentId (number, path) – Document ID.

search_bill_stage_ping_pong_items

Returns a list of motions or amendments for a Bill stage.

Parameters:

• billId (number, path) – Bill ID.
• billStageId (number, path) – Bill stage ID.
• SearchTerm (string, query) – Optional text search.
• AmendmentNumber (string, query) – Optional amendment number.
• Decision (string, query) – Optional decision enum.
• MemberId (number, query) – Optional member ID.
• Skip (number, query) – Optional offset.
• Take (number, query) – Optional limit.

get_bill_stage_ping_pong_item

Returns an amendment or motion detail.

Parameters:

• billId (number, path) – Bill ID.
• billStageId (number, path) – Bill stage ID.
• pingPongItemId (number, path) – Ping pong item ID.

list_publication_types

Returns a list of publication types.

Parameters:

• Skip (number, query) – Optional offset.
• Take (number, query) – Optional limit.

list_bill_publications

Returns Bill publications.

Parameters:

• billId (number, path) – Bill ID.

list_bill_stage_publications

Returns publications for a Bill stage.

Parameters:

• billId (number, path) – Bill ID.
• stageId (number, path) – Stage ID.

get_rss_all_bills

Returns an RSS feed for all Bills.

get_rss_public_bills

Returns an RSS feed for public Bills.

get_rss_private_bills

Returns an RSS feed for private Bills.

get_rss_bill_by_id

Returns an RSS feed for a specific Bill.

Parameters:

• id (number, path) – Bill ID.

search_sittings

Returns a list of sittings.

Parameters:

• House (string, query) – Optional house enum.
• DateFrom (string, query) – Optional start date.
• DateTo (string, query) – Optional end date.
• Skip (number, query) – Optional offset.
• Take (number, query) – Optional limit.

list_stage_references

Returns a list of Bill stages.

Parameters:

• Skip (number, query) – Optional offset.
• Take (number, query) – Optional limit.

Example Output

{
  "status": 200,
  "data": {
    "items": [
      {
        "billId": 1,
        "title": "Energy Security Bill",
        "currentStage": "Commons Committee",
        "currentHouse": "Commons",
        "lastUpdated": "2026-03-11T10:00:00Z"
      }
    ],
    "totalResults": 1
  },
  "upstream_path": "/api/v1/Bills",
  "retrieved_at": "2026-03-11T10:00:00.000Z"
}

Quick Start

Run the MCP server using npx:

npx -y -p @darkhorseone/mcp-server-uk-parliament-bills mcp-server-uk-parliament-bills

MCP Configuration

Example mcpServers configuration for stdio transport:

{
  "mcpServers": {
    "uk-parliament-bills": {
      "command": "npx",
      "args": ["-y", "-p", "@darkhorseone/mcp-server-uk-parliament-bills", "mcp-server-uk-parliament-bills"],
      "env": {
        "UPSTREAM_BASE_URL": "https://bills-api.parliament.uk",
        "REQUEST_TIMEOUT_MS": "10000"
      }
    }
  }
}

Example Usage

• List the latest UK Parliament Bills.
• Fetch a specific Bill by ID and return the current stage.
• Retrieve publications for a Bill and download a document.
• Get the RSS feed for public Bills for downstream tools.

Use Cases

• AI agents summarizing legislative progress and bill status.
• Developer tools that monitor bill updates via the API and RSS.
• Civic technology platforms tracking amendments and parliamentary stages.
• Automation workflows that enrich datasets with UK Parliament Bills metadata.

Data Source

UK Parliament Bills API https://bills-api.parliament.uk

Installation

Run directly using npx:

npx -y -p @darkhorseone/mcp-server-uk-parliament-bills mcp-server-uk-parliament-bills

Or install via pnpm from the repository root:

pnpm install

Run (HTTP proxy server)

Build first, then start:

pnpm --filter @darkhorseone/mcp-server-uk-parliament-bills run build
pnpm --filter @darkhorseone/mcp-server-uk-parliament-bills run start:http

Set a custom HTTP port with the UKP_HTTP_PORT environment variable (default: 3000):

UKP_HTTP_PORT=8787 pnpm --filter @darkhorseone/mcp-server-uk-parliament-bills run start:http

Published package command:

npx -y -p @darkhorseone/mcp-server-uk-parliament-bills -- mcp-server-uk-parliament-bills-http

If your shell cannot resolve the bin ("command not found"), run the HTTP entrypoint directly:

npx -y -p @darkhorseone/mcp-server-uk-parliament-bills -- node ./dist/http.js

Health check:

curl http://127.0.0.1:3000/healthz

Proxy pattern:

GET /proxy/<upstream-path>?<query>

Example:

curl "http://127.0.0.1:3000/proxy/api/v1/Bills?SearchTerm=energy&SortOrder=TitleAscending"

License

MIT License

MCP Metadata

Protocol: Model Context Protocol Transport: stdio Tools: search_bill_stage_amendments, get_bill_stage_amendment, list_bill_news_articles, list_bill_types, search_bills, get_bill, get_bill_stage_details, list_bill_stages, get_publication_document, download_publication_document, search_bill_stage_ping_pong_items, get_bill_stage_ping_pong_item, list_publication_types, list_bill_publications, list_bill_stage_publications, get_rss_all_bills, get_rss_public_bills, get_rss_private_bills, get_rss_bill_by_id, search_sittings, list_stage_references