Bill Commons MCP MCP server

An official MCP server provided by Bill Commons that allows AI agents to search and cite US state legislation. It supports querying bills by keyword, number, or sponsor, retrieving full bill records including sponsors and votes, comparing bill versions, and checking jurisdiction coverage. The server provides structured JSON results with canonical IDs and source URLs, enabling accurate legislative research without modifying data.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-05Operated by Bill Commons

MCP endpoint (Streamable HTTP)

https://mcp.billcommons.org/mcp

Vendor documentation

What you can do with it

Search bills across jurisdictions by keyword, number, sponsor, subject, or status
Fetch full bill records including sponsors, actions, versions, and votes
Compare bill versions to see deterministic diffs between texts
Check local data coverage for specific states before trusting results

Tools advertised by the last live check:

search_legislation
get_bill_record
compare_bill_versions
find_similar_bills
get_vote_details
trace_legislative_history
build_legislative_evidence_packet
get_jurisdiction_coverage
get_active_sessions
list_topics

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http bill-commons-mcp https://mcp.billcommons.org/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add bill-commons-mcp --url https://mcp.billcommons.org/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable bill-commons-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "bill-commons-mcp": {
      "url": "https://mcp.billcommons.org/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "bill-commons-mcp": {
      "type": "streamableHttp",
      "url": "https://mcp.billcommons.org/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start bill-commons-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "bill-commons-mcp": {
      "type": "http",
      "url": "https://mcp.billcommons.org/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http bill-commons-mcp https://mcp.billcommons.org/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "bill-commons-mcp": {
      "url": "https://mcp.billcommons.org/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "bill-commons-mcp": {
      "serverUrl": "https://mcp.billcommons.org/mcp"
    }
  }
}

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