senado-br-mcp

MCP Server for Brazilian Federal Senate open data - legislators, bills, votes, committees

GitHub

senado-br-mcp

MCP server for Brazilian Federal Senate open data (legislators, bills, votes, committees).

Servidor MCP (Model Context Protocol) que permite acesso estruturado aos dados abertos do Senado Federal do Brasil, democratizando o acesso a informações legislativas através de conversas com IA.

Features

  • 33 tools for accessing Senate data
  • Real-time data from official API
  • e-Cidadania integration: citizen participation data via web scraping
  • Structured JSON responses
  • Error handling with actionable suggestions
  • TypeScript with full type safety
  • Two access modes: stdio (npm) and HTTP remote

Two Ways to Use

ModeInstallationBest For
stdio/npmnpx senado-br-mcpTechnical users, local usage
HTTP remoteNone requiredNon-technical users, cloud access

Both modes provide access to the same 33 tools.

Option 1: stdio/npm (Local)

Installation

Using npx (Recommended):

npx senado-br-mcp

Global Installation:

npm install -g senado-br-mcp
senado-br-mcp

From Source:

git clone https://github.com/SidneyBissoli/senado-br-mcp.git
cd senado-br-mcp
npm install
npm run build
npm start

Claude Desktop Configuration

Add to your claude_desktop_config.json:

Windows: %APPDATA%\Claude\claude_desktop_config.json macOS: ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "senado-br-mcp": {
      "command": "npx",
      "args": ["-y", "senado-br-mcp"]
    }
  }
}

Option 2: HTTP Remote (Cloud)

No installation required. Connect directly via URL.

Claude Desktop Configuration

In Claude Desktop settings, go to "Add Custom Connector" and enter:

  • Name: senado-br-mcp
  • URL: https://senado-br-mcp.up.railway.app/mcp

Endpoints

EndpointDescription
GET /Server info and documentation
GET /healthHealth check
GET /statsUsage statistics
POST /mcpMCP protocol endpoint

Rate Limiting

The HTTP server has a monthly request limit to stay within free tier:

  • Alerts are sent at 50%, 80%, and 100% usage
  • When limit is reached, use the npm version instead
  • Limit resets on the 1st of each month

Available Tools

Senators (Senadores)

ToolDescription
senado_listar_senadoresList senators in office or by legislature. Filters: state (UF), party
senado_obter_senadorGet detailed info about a senator (biography, mandates, committees)
senado_buscar_senador_por_nomeSearch senators by name
senado_votacoes_senadorList how a senator voted. Filters: year, date range

Legislative Matters (Matérias)

ToolDescription
senado_buscar_materiasSearch bills by type (PEC, PL, PLP, MPV), number, year, keyword, author
senado_obter_materiaGet bill details (summary, author, status, rapporteur)
senado_tramitacao_materiaGet bill's procedural history
senado_textos_materiaGet bill texts (original, substitute, final) with download URLs
senado_votos_materiaGet voting results for a bill

Votes (Votações)

ToolDescription
senado_listar_votacoesList plenary votes by year. Filters: month, date range
senado_obter_votacaoGet vote details with nominal votes by senator
senado_votacoes_recentesGet recent votes (last N days)

Committees (Comissões)

ToolDescription
senado_listar_comissoesList committees. Filters: type (permanent, temporary, CPI), active
senado_obter_comissaoGet committee details (president, vice-president, purpose)
senado_membros_comissaoList committee members with roles
senado_reunioes_comissaoList committee meetings with agenda

Agenda

ToolDescription
senado_agenda_plenarioGet plenary session schedule with voting agenda
senado_agenda_comissoesGet committee meeting schedule

Lookup/Auxiliary (Auxiliares)

ToolDescription
senado_legislatura_atualGet current legislature info (number, period, dates)
senado_tipos_materiaList valid bill types (PEC, PL, PLP, MPV, etc.)
senado_partidosList parties with senator count
senado_ufsList states with senator count

e-Cidadania (Citizen Participation)

Tools for accessing e-Cidadania data - the Senate's citizen participation platform.

Public Consultations (Consultas Públicas)

ToolDescription
senado_ecidadania_listar_consultasList public consultations with citizen voting on pending bills
senado_ecidadania_obter_consultaGet consultation details including votes, author, and comments
senado_ecidadania_consultas_polarizadasGet polarized consultations (~50/50 votes) - useful for identifying divisive issues
senado_ecidadania_consultas_consensuaisGet consensual consultations (>85% one way) - identifies broad agreement

Legislative Ideas (Ideias Legislativas)

ToolDescription
senado_ecidadania_listar_ideiasList citizen-proposed legislative ideas
senado_ecidadania_obter_ideiaGet idea details including full description and conversion to bill
senado_ecidadania_ideias_popularesGet most supported legislative ideas

Interactive Events (Eventos Interativos)

ToolDescription
senado_ecidadania_listar_eventosList interactive events (hearings, confirmations, livestreams)
senado_ecidadania_obter_eventoGet event details including agenda, guests, and video link
senado_ecidadania_eventos_popularesGet events with most citizen comments and questions

Analysis Tools

ToolDescription
senado_ecidadania_sugerir_tema_enqueteAI-assisted analysis to suggest topics for monthly surveys based on participation metrics

Note: e-Cidadania tools use web scraping with rate limiting and caching. If the e-Cidadania website is temporarily unavailable, API tools (senators, bills, votes) remain operational.

Usage Examples

List senators from São Paulo

Use senado_listar_senadores with uf: "SP"

Search for Constitutional Amendments in 2024

Use senado_buscar_materias with sigla: "PEC", ano: 2024

Get recent votes

Use senado_votacoes_recentes with dias: 7

Find a senator by name

Use senado_buscar_senador_por_nome with nome: "Randolfe"

Get CCJ committee members

Use senado_membros_comissao with sigla: "CCJ"

Get polarized public consultations

Use senado_ecidadania_consultas_polarizadas with minimoVotos: 5000

Get most supported citizen ideas

Use senado_ecidadania_ideias_populares with limite: 5

Find upcoming interactive events

Use senado_ecidadania_listar_eventos with status: "agendado"

Response Format

All tools return structured JSON responses:

Success Response

{
  "success": true,
  "data": { ... },
  "metadata": {
    "fonte": "Senado Federal - Dados Abertos",
    "dataConsulta": "2024-01-15T10:30:00Z",
    "endpoint": "/senador/lista/atual"
  }
}

Error Response

{
  "success": false,
  "error": {
    "code": "SENADOR_NAO_ENCONTRADO",
    "message": "Senator with code 99999 was not found",
    "suggestion": "Use senado_buscar_senador_por_nome to find the correct code"
  }
}

Development

Prerequisites

  • Node.js 18+
  • npm

Setup

npm install

Build

# Build stdio version (npm package)
npm run build

# Build HTTP server version
npm run build:server

# Build both
npm run build:all

Development Mode

# stdio mode
npm run dev

# HTTP server mode
npm run dev:server

Type Check

npm run typecheck

Test with MCP Inspector

npm run inspect

Self-Hosting HTTP Server

You can host your own HTTP server instance.

Local

npm run build:server
npm run start:server
# Server runs on http://localhost:3000

Railway

  1. Fork this repository
  2. Connect Railway to your GitHub
  3. Deploy (auto-detects configuration from railway.json)
  4. Set environment variables:
    • MONTHLY_REQUEST_LIMIT (default: 10000)
    • ALERT_WEBHOOK_URL (optional, for notifications)

Environment Variables

VariableDescriptionDefault
PORTServer port3000
MONTHLY_REQUEST_LIMITMonthly request limit10000
ALERT_WEBHOOK_URLWebhook for alerts-
LOG_LEVELLogging levelinfo

Data Sources

Official API

e-Cidadania (Web Scraping)

  • Website: e-Cidadania
  • Content: Public consultations, legislative ideas, interactive events
  • Method: HTML scraping with rate limiting (1 req/sec) and caching (15min-24h)
  • Fallback: If e-Cidadania is unavailable, API tools continue working

Bill Types (Tipos de Matéria)

CodeNameDescription
PECProposta de Emenda à ConstituiçãoConstitutional Amendment
PLProjeto de LeiOrdinary Law Bill
PLPProjeto de Lei ComplementarComplementary Law Bill
MPVMedida ProvisóriaProvisional Measure
PDLProjeto de Decreto LegislativoLegislative Decree Bill
PRSProjeto de Resolução do SenadoSenate Resolution Bill
PLCProjeto de Lei da CâmaraChamber of Deputies Bill

License

MIT

Author

Sidney da Silva Pereira Bissoli

Repository

https://github.com/SidneyBissoli/senado-br-mcp

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

Changelog

1.1.0

  • Added e-Cidadania integration (11 new tools)
  • Web scraping infrastructure with rate limiting and caching
  • Public consultations analysis (polarized/consensual)
  • Legislative ideas tracking
  • Interactive events monitoring
  • Survey topic suggestion tool

1.0.0

  • Initial release
  • 22 tools for Senate data access
  • Senators, bills, votes, committees, agenda, and lookup tools

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