How to Use the Worldpay MCP in Pydantic AI

Q: Can I use Worldpay refunds with the Pydantic AI framework?

Yes. The refundpaymentorder tool is fully supported. If you try an invalid order code, the agent won't proceed; it'll throw a validation error that tells you exactly why.

Q: Does the Pydantic AI framework support listing Worldpay settlements?

It does. When running listpaymentsettlements, Pydantic verifies that every settlement record returned is properly typed, giving you high confidence in your financial reports.

Process payments with guaranteed accuracy using Worldpay and the Pydantic AI framework.

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Connect Worldpay MCP to Pydantic AI

Create your Vinkius account to connect Worldpay 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 Worldpay with Pydantic AI

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Create Payments via MCP Server

The `create_payment_order` tool lets your agent start a payment. You provide the token, amount, currency, and order description, and Pydantic validates that all parameters are correct before calling Worldpay. You can also create reusable tokens using `create_reusable_token`, ensuring that the sensitive card data is captured and validated against strict type models.

Manage Refunds and Orders

To refund a payment, your agent uses `refund_payment_order`. Because of Pydantic's validation layer, if you miss an order code or amount, the agent fails loudly with a specific error. This prevents silent data corruption. The `get_order_details` tool retrieves transaction specifics, and it validates that the returned payment order data matches your expected Python model.

Audit Worldpay Status

The agent can check the connection status with `get_api_health`, getting a clear boolean result. You can also list all settlements via `list_payment_settlements`. The Pydantic validation ensures that the settlement data returned is structured exactly how you need it. Other useful tools include `list_webhook_endpoints` and `get_token_details` for full system auditing.

Setup guide

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

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

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

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Common questions about Worldpay MCP in Pydantic AI

Pydantic validates every response from the MCP Server, including payment results. When your agent calls `create_payment_order`, it guarantees that the data returned—whether success or failure—conforms to defined schemas.

Yes. The `refund_payment_order` tool is fully supported. If you try an invalid order code, the agent won't proceed; it'll throw a validation error that tells you exactly why.

The server handles payment tokens and amounts. The core benefit is that even if the underlying API changes, your agent doesn't break because Pydantic validates the structure of the `get_token_details` output.

It does. When running `list_payment_settlements`, Pydantic verifies that every settlement record returned is properly typed, giving you high confidence in your financial reports.

The server processes payment tokens and order descriptions. The type safety provided by Pydantic ensures that even the metadata received from `create_reusable_token` is correctly structured for your application.

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