How to Use the FreeToGame MCP in Pydantic AI

Q: Why does Pydantic AI reject my FreeToGame list query?

Your agent likely hallucinated a sort parameter that listgames does not accept. Check your runtime validation logs to see which field triggered the strict type error.

Q: Can my Pydantic AI agent combine FreeToGame tags?

Yes. It passes a dot-separated string to filtergames to find overlapping genres. The framework ensures the string formatting matches the tool schema.

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Connect FreeToGame MCP to Pydantic AI

Create your Vinkius account to connect FreeToGame 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 FreeToGame with Pydantic AI

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Pydantic AI MCP Server Validation

When the agent calls `list_games` via the FreeToGame MCP server, it gets an array of titles that your framework validates at runtime. This feeds raw game directories into your agent with strict data shaping. If the external API drops a field or changes a type, the agent fails loudly. You catch the validation error immediately instead of passing corrupted game data downstream to your users.

Type-Strict Tag Filtering

`filter_games` forces the agent to use specific tag strings to narrow down the game database. It searches by categories like fantasy, pvp, or mmorpg while applying platform constraints. Because Pydantic AI is model-agnostic, you can swap between Anthropic and local models without changing the tool logic. The framework guarantees the model passes the right string format to the filtering endpoint every time.

Extract Structured Hardware Specs

`get_game` pulls the deep details for a single game, including the exact minimum CPU and RAM required to run it. The agent requests this data using the unique game ID. You define a strict response model for your agent. It parses the hardware specs from the tool and maps them perfectly to your internal schema, dropping any empty fields or malformed screenshot URLs.

Setup guide

Set up FreeToGame 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": {
        "freetogame-mcp": {
            "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
        }
    }
})

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

result = await agent.run("List recent FreeToGame transactions")
print(result.output)

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Common questions about FreeToGame MCP in Pydantic AI

Install the slim package with the MCP extra. Initialize MCPToolset with your HTTP endpoint URL. Pass the resulting toolset into your Agent constructor.

Your agent likely hallucinated a sort parameter that `list_games` does not accept. Check your runtime validation logs to see which field triggered the strict type error.

Yes. It passes a dot-separated string to `filter_games` to find overlapping genres. The framework ensures the string formatting matches the tool schema.

It works perfectly. As long as your local model can output JSON that matches the tool schema, the framework will execute `get_game` and return the result.

The tool handles public variables like release dates, publisher names, and genre strings. Vinkius requires a single endpoint token for authentication, keeping your actual infrastructure credentials entirely separate from the game fetching process.

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