How to Use the Mail Blaze MCP in Pydantic AI

Q: How do I register the Mail Blaze MCP Server in Pydantic AI?

Instantiate MCPToolset with the Vinkius HTTP endpoint and pass it to your Agent constructor. The framework auto-discovers all nine tools and validates their inputs at runtime.

Q: How do I handle lists type-safely with Mail Blaze and Pydantic AI?

Use listsubscriberlists to fetch active lists as strongly typed objects. The tool ensures the returned list IDs and subscriber counts strictly match the expected Python types.

Build type-safe email automation pipelines with Pydantic AI and Mail Blaze to prevent schema errors at runtime.

See Vinkius in Action

Works with every AI agent you already use

…and any MCP-compatible client

MCP Servers - Free for Subscribers

Connect Mail Blaze MCP to Pydantic AI

Create your Vinkius account to connect Mail Blaze 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.

GDPR Free for Subscribers

Setup Mail Blaze with Pydantic AI

Ask AI about this MCP

ChatGPT

Claude

Perplexity

Type-safe subscriber syncing in Pydantic AI

This MCP Server integration relies on the `add_subscriber_to_list` tool to enforce strict schema validation when adding new contacts to your database. If your application sends invalid subscriber data, the runtime fails immediately before hitting the API. This type safety extends to `update_list_subscriber` and `delete_list_subscriber`. You never have to worry about silent failures or corrupted contact records syncing to your marketing lists.

Strict validation for email campaigns

Using this MCP Server, the `create_new_campaign` tool requires structured JSON input that is validated against strict Pydantic models. This ensures your subject lines, sender details, and HTML content are formatted perfectly. Once validated, the campaign can be safely dispatched using `send_email_campaign`. The framework guarantees that only structurally sound campaigns make it to your subscribers' inboxes.

Structured auditing of lists and metrics

The `get_campaign_details` tool returns strongly typed campaign metrics directly to your agent. Your code can safely parse open rates and click counts without risk of missing fields. Running `list_subscriber_lists` and `list_list_subscribers` lets your system inspect current audiences. The returned data conforms strictly to your defined schemas, making downstream data processing predictable.

Setup guide

Set up Mail Blaze 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": {
        "mail-blaze-mcp": {
            "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
        }
    }
})

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

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

Get your connection token →

Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Mail Blaze. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

Why Choose Vinkius

Vinkius connects your tools to AI with real-time monitoring and automatic cost savings — all from one dashboard.

Connect Mail Blaze now

Real-time monitoring

Live

visibility into every interaction

Connect your favorite tools to your AI and see exactly what's happening — every request, every response, in real time.

Built-in savings

60%

lower AI costs

Vinkius compresses data between your apps and your AI automatically. Lower bills every month — no configuration required.

Single dashboard

One

place for every integration

Every tool your AI connects to, managed from a single screen. One account, complete control.

Common questions about Mail Blaze MCP in Pydantic AI

Instantiate `MCPToolset` with the Vinkius HTTP endpoint and pass it to your `Agent` constructor. The framework auto-discovers all nine tools and validates their inputs at runtime.

The framework will raise a validation error instantly if the API returns unexpected structures. This prevents your agent from acting on corrupted payloads or hallucinating fields that do not exist.

Use `list_subscriber_lists` to fetch active lists as strongly typed objects. The tool ensures the returned list IDs and subscriber counts strictly match the expected Python types.

Yes, the server handles asynchronous requests natively. You can run concurrent calls to `add_subscriber_to_list` or `get_campaign_details` within your async event loop.

All subscriber email addresses are transmitted over secure, encrypted HTTPS channels. Vinkius isolates the execution environment inside zero-trust sandboxes, ensuring your data is never cached or leaked.

Use it with your favorite AI tools

Connect this server to Cursor, Claude, VS Code, and more.

OpenAI Agents SDK sdk-python

Google ADK sdk-python

Pydantic AI sdk-python

Vercel AI SDK sdk-typescript