Public data · Brazil

Arvor Eleições

Ask the elections. Check the sources.

Presidential results from both rounds of the 2022 and 2026 Brazilian elections, organized by state, municipality, electoral zone, polling place and polling section.

Get started Explore the reports

Public MCP available · manual setup

Your AI, connected to sources

One connection. Many questions.

MCP connects your AI to Arvor's data collection. Set it up once, then ask questions in your conversation without downloading databases.

No authentication or API key · read-only

The plugins are not yet published in the ChatGPT or Claude directories. Use the instructions below. Availability depends on your account and workspace permissions.

01

On the web

ChatGPT

  1. Open Plugins in ChatGPT. Select +, then Add custom MCP server.
  2. Name it Arvor Eleições and paste the MCP address above into Server URL. Select No authentication.
  3. Review the connection notice, create and install the plugin. In your conversation, type @, select Arvor Eleições and ask a question.
Open Plugins Official guide
02

Custom connector

Claude

  1. Open Customize → Connectors. Select + Add → Add custom connector.
  2. Name it Arvor Eleições and paste the MCP address above. Choose No sign in for authentication; no credentials are required.
  3. Complete setup and enable it in your conversation under + → Connectors. Ask Claude to use Arvor Eleições.
Open Claude Official guide

Using Claude Code?

Paste this command inside Claude Code to install the plugin and analytical skill. Review connection permissions when prompted.

/plugin install arvor-eleicoes --marketplace ArvorCo/arvor-eleicoes

The skill guides interpretation; the MCP runs queries. In other compatible clients, use the same address with HTTP transport and no authentication.

Source and documentation on GitHub ↗

Start with coverage

Use Arvor Eleições to describe the available elections and regions, snapshot date and data limitations. Then show presidential results for Rio Branco, Acre, in the 2026 runoff, with votes, turnout and source.

Watch a real query

Real ChatGPT queries, with English narration and captions. AI-generated narration. Interfaces and menu names may vary.

Open video ↗

Before your first question

Do I need to upload files or pay Arvor?

This public MCP requires no Arvor account, API key or payment. Your AI application's plan and usage limits still apply.

I cannot find the option to add a connector.

Check your application's official guide. Menu names and availability vary. Team accounts may need an administrator to enable custom connections. You can also read the public reports without connecting an AI.

Is this live election data?

No. This version uses the October 29, 2026 snapshot. Always request coverage and sources. Log, closing and receipt diagnostics in this MCP cover only the 2026 runoff, Brazil excluding overseas voters.

Can the AI answer any nationwide ranking?

Current tools query selections and specific rankings. A partial list is not the whole country. If a question needs an aggregation the MCP does not provide, the AI should explain the limitation rather than invent a ranking.

What this version covers

Four electoral datasets

Presidential results by polling section for both rounds of 2022 and 2026. Calculations must always identify the year, round and coverage.

Data with context

TSE sources and the Arvor collection, with dictionaries, methodology and timing analyses. Log and timestamp coverage varies by election and dataset.

Queries with explicit limits

The service queries public data in read-only mode. It does not modify election records, identify voters or reveal an individual's vote.

From a question to the right data

  1. What were the presidential results in my municipality in each round?
  2. How did turnout change between 2022 and 2026?
  3. What do the available records show about closing and receipt times?

A signal calls for investigation. It does not settle the question.

Gaps between closing and receipt times, inconsistent clocks or differences between voting-machine models do not establish fraud on their own. Check coverage, time zones, definitions and sources before drawing conclusions. AI-generated answers also require verification.

Arvor Eleições is an independent initiative. It is not an official TSE service and does not imply endorsement by TSE or OpenAI. Publication in the plugin directory is still being prepared.