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

Mode	Installation	Best For
stdio/npm	npx senado-br-mcp	Technical users, local usage
HTTP remote	None required	Non-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

Endpoint	Description
GET /	Server info and documentation
GET /health	Health check
GET /stats	Usage statistics
POST /mcp	MCP 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)

Tool	Description
senado_listar_senadores	List senators in office or by legislature. Filters: state (UF), party
senado_obter_senador	Get detailed info about a senator (biography, mandates, committees)
senado_buscar_senador_por_nome	Search senators by name
senado_votacoes_senador	List how a senator voted. Filters: year, date range

Legislative Matters (Matérias)

Tool	Description
senado_buscar_materias	Search bills by type (PEC, PL, PLP, MPV), number, year, keyword, author
senado_obter_materia	Get bill details (summary, author, status, rapporteur)
senado_tramitacao_materia	Get bill's procedural history
senado_textos_materia	Get bill texts (original, substitute, final) with download URLs
senado_votos_materia	Get voting results for a bill

Votes (Votações)

Tool	Description
senado_listar_votacoes	List plenary votes by year. Filters: month, date range
senado_obter_votacao	Get vote details with nominal votes by senator
senado_votacoes_recentes	Get recent votes (last N days)

Committees (Comissões)

Tool	Description
senado_listar_comissoes	List committees. Filters: type (permanent, temporary, CPI), active
senado_obter_comissao	Get committee details (president, vice-president, purpose)
senado_membros_comissao	List committee members with roles
senado_reunioes_comissao	List committee meetings with agenda

Agenda

Tool	Description
senado_agenda_plenario	Get plenary session schedule with voting agenda
senado_agenda_comissoes	Get committee meeting schedule

Lookup/Auxiliary (Auxiliares)

Tool	Description
senado_legislatura_atual	Get current legislature info (number, period, dates)
senado_tipos_materia	List valid bill types (PEC, PL, PLP, MPV, etc.)
senado_partidos	List parties with senator count
senado_ufs	List states with senator count

e-Cidadania (Citizen Participation)

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

Public Consultations (Consultas Públicas)

Tool	Description
senado_ecidadania_listar_consultas	List public consultations with citizen voting on pending bills
senado_ecidadania_obter_consulta	Get consultation details including votes, author, and comments
senado_ecidadania_consultas_polarizadas	Get polarized consultations (~50/50 votes) - useful for identifying divisive issues
senado_ecidadania_consultas_consensuais	Get consensual consultations (>85% one way) - identifies broad agreement

Legislative Ideas (Ideias Legislativas)

Tool	Description
senado_ecidadania_listar_ideias	List citizen-proposed legislative ideas
senado_ecidadania_obter_ideia	Get idea details including full description and conversion to bill
senado_ecidadania_ideias_populares	Get most supported legislative ideas

Interactive Events (Eventos Interativos)

Tool	Description
senado_ecidadania_listar_eventos	List interactive events (hearings, confirmations, livestreams)
senado_ecidadania_obter_evento	Get event details including agenda, guests, and video link
senado_ecidadania_eventos_populares	Get events with most citizen comments and questions

Analysis Tools

Tool	Description
senado_ecidadania_sugerir_tema_enquete	AI-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

Variable	Description	Default
PORT	Server port	3000
MONTHLY_REQUEST_LIMIT	Monthly request limit	10000
ALERT_WEBHOOK_URL	Webhook for alerts	-
LOG_LEVEL	Logging level	info

Data Sources

Official API

• API: Senado Federal - Dados Abertos
• Documentation: https://legis.senado.leg.br/dadosabertos/docs/
• Format: JSON
• Authentication: None (public data)

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)

Code	Name	Description
PEC	Proposta de Emenda à Constituição	Constitutional Amendment
PL	Projeto de Lei	Ordinary Law Bill
PLP	Projeto de Lei Complementar	Complementary Law Bill
MPV	Medida Provisória	Provisional Measure
PDL	Projeto de Decreto Legislativo	Legislative Decree Bill
PRS	Projeto de Resolução do Senado	Senate Resolution Bill
PLC	Projeto de Lei da Câmara	Chamber 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