How to Use the BOE (Boletín Oficial del Estado) MCP in Pydantic AI

Q: Can I search BOE (Boletín Oficial del Estado) using Pydantic AI?

Yes, the searchconsolidatedlegislation tool works perfectly with Pydantic AI. You get structured, typed results that fit right into your agent's schema.

Q: Is this MCP Server compatible with the Pydantic AI toolset?

It is. You use MCPToolset to connect the server, which provides a unified interface for all 17 tools listed.

Strictly typed Spanish legal data for Pydantic AI applications.

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Connect BOE (Boletín Oficial del Estado) MCP to Pydantic AI

Create your Vinkius account to connect BOE (Boletín Oficial del Estado) 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 BOE (Boletín Oficial del Estado) with Pydantic AI

Ask AI about this MCP

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Claude

Perplexity

Type-safe legal data for Pydantic AI

Every response from `get_legislation_text_index` is validated against your Pydantic models. If the BOE returns unexpected fields, your agent catches it immediately. This prevents silent failures in your logic. You gain confidence that the legislation data matches your expected structure before the agent uses it.

Explore relations with this MCP Server

Use `list_previous_relations` and `list_posterior_relations` to map the history of a law. These tools provide the structural data your agent needs to understand how regulations evolve. Your Pydantic AI agent will use these tools to build a dependency graph of legislation. It keeps your data models accurate and helps you avoid outdated legal references.

List auxiliary data for Pydantic AI

Call `list_departments` or `list_ranks` to get the administrative context for any legal update. This helps your agent correctly classify and prioritize new gazette entries. `MCPToolset` integrates these calls into your agent's workflow. It ensures that every piece of information is validated at runtime, maintaining the integrity of your entire system.

Setup guide

Set up BOE (Boletín Oficial del Estado) 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": {
        "boe-boletin-oficial-del-estado-mcp": {
            "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
        }
    }
})

agent = Agent(
    "openai:gpt-4o",
    toolsets=[toolset],
    system_prompt="You have access to BOE (Boletín Oficial del Estado) tools.",
)

result = await agent.run("List recent BOE (Boletín Oficial del Estado) transactions")
print(result.output)

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Common questions about BOE (Boletín Oficial del Estado) MCP in Pydantic AI

Pydantic AI handles this automatically. Since the tools are linked to your models, any mismatched data triggers a validation error instead of passing bad information to your agent.

Yes, the `search_consolidated_legislation` tool works perfectly with Pydantic AI. You get structured, typed results that fit right into your agent's schema.

It is. You use `MCPToolset` to connect the server, which provides a unified interface for all 17 tools listed.

Your agent will fail with a loud validation error. This is a core feature of Pydantic AI that keeps your production data clean and predictable.

The server only touches public legal text and metadata. Vinkius secures the connection with a unique endpoint token, ensuring no unauthorized access occurs during the validation process.

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