How to Use the IBGE Localidades — Cidades do Brasil MCP in Pydantic AI

Run type-safe Brazilian geographic lookups in your Pydantic AI workflows with zero state management.

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Connect IBGE Localidades — Cidades do Brasil MCP to Pydantic AI

Create your Vinkius account to connect IBGE Localidades — Cidades do Brasil to Pydantic AI and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup IBGE Localidades — Cidades do Brasil with Pydantic AI

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Type-Safe State Resolution via MCP Server

Parsing raw API responses often breaks your runtime type guarantees. This MCP Server integrates with Pydantic AI so tools like `list_estados` and `list_regioes` return structured, validated data structures. If the underlying government API changes, your system catches it immediately. You avoid silent data corruption because every state and region is validated before your agent processes it.

Strict Validation for Brazilian Municipalities

Validating 5,570 cities requires strict schema enforcement. Your agent can call `get_municipios_por_uf` to fetch all municipalities in a state, knowing that Pydantic AI will validate the output schema. For single-city lookups, the `get_municipio` tool ensures that the returned 7-digit code and name fit your models perfectly. This makes it safe to use in transactional banking or shipping pipelines.

Map Metropolitan Hubs without Hallucinations

AI agents frequently hallucinate which cities belong to which metropolitan areas. The `list_regioes_metropolitanas` tool solves this by pulling official government clusters directly into your runtime. This gives your agent a reliable source of truth for geographical grouping. You get clean, validated lists without writing manual validation schemas.

Setup guide

Set up IBGE Localidades — Cidades do Brasil MCP in Pydantic AI

Prerequisites

Python 3.10+ installed
pydantic-ai-slim[fastmcp] package
Active Vinkius subscription with a valid endpoint token

1

Install Pydantic AI with FastMCP
Run pip install "pydantic-ai-slim[fastmcp]". The FastMCP toolset replaces the deprecated MCPServerHTTP class with full protocol support.
2

Configure the FastMCPToolset
Pass a JSON-style config dict to FastMCPToolset with your Vinkius URL. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com. Supports Streamable HTTP, SSE, and Stdio transports.
3

Create and run your agent
Pass the toolset to Agent(toolsets=[toolset]) and call agent.run(). Swap openai:gpt-4o for any supported model — Anthropic, Google, Mistral, or Groq.

agent.py

from pydantic_ai import Agent
from pydantic_ai.toolsets.fastmcp import FastMCPToolset

toolset = FastMCPToolset({
    "mcpServers": {
        "ibge-localidades-cidades-do-brasil-mcp": {
            "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
        }
    }
})

agent = Agent(
    "openai:gpt-4o",
    toolsets=[toolset],
    system_prompt="You have access to IBGE Localidades — Cidades do Brasil tools.",
)

result = await agent.run("List recent IBGE Localidades — Cidades do Brasil transactions")
print(result.output)

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Common questions about IBGE Localidades — Cidades do Brasil MCP in Pydantic AI

Install the slim package with the MCP extra and initialize the `MCPToolset` with your Vinkius HTTP URL. Pass this toolset into your Agent constructor. The agent will automatically discover tools like `list_estados` and validate their outputs.

Yes, the server works natively with the async capabilities of Pydantic AI. You can run concurrent geographical lookups using `get_municipios_por_uf` without blocking your main event loop.

If the server returns data that violates your defined schemas, Pydantic AI raises a validation error immediately. This prevents your agent from passing bad municipal data further down your processing pipeline.

No, the server queries the live IBGE API directly. Vinkius hosts the server, meaning your code only needs to point to the secure HTTP endpoint to start querying cities.

It operates in a secure, ephemeral V8 isolate on Vinkius. The server only handles public administrative hierarchies, ensuring that your queries regarding states and municipalities remain isolated and private.

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