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AllMCP AllMCP

PydanticAI

PydanticAI has native MCP support via MCPServerStreamableHTTP. AllMCP works as a drop-in server.

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Install

Section titled “Install”
install
pip install 'pydantic-ai-slim[mcp]'

Minimal example

Section titled “Minimal example”
agent.py
import asyncio
from pydantic_ai import Agent
from pydantic_ai.mcp import MCPServerStreamableHTTP


allmcp = MCPServerStreamableHTTP(
    url="https://go.allmcp.co/mcp/",
    headers={"X-API-Key": "YOUR_API_KEY"},
)


agent = Agent(
    "anthropic:claude-sonnet-4-6",
    toolsets=[allmcp],
)


async def main():
    async with agent:
        result = await agent.run("List all open deals in my CRM")
        print(result.output)


asyncio.run(main())

Multi-user setup

Section titled “Multi-user setup”
multi_user.py
def make_agent(user_id: str) -> Agent:
    server = MCPServerStreamableHTTP(
        url=f"https://go.allmcp.co/mcp/?user_id={user_id}",
        headers={"X-API-Key": "YOUR_API_KEY"},
    )
    return Agent("anthropic:claude-sonnet-4-6", toolsets=[server])


async def handle_request(user_id: str, prompt: str) -> str:
    agent = make_agent(user_id)
    async with agent:
        result = await agent.run(prompt)
        return result.output

Streaming

Section titled “Streaming”

PydanticAI supports streaming with MCP tools:

streaming.py
async def stream_response():
    async with agent:
        async with agent.run_stream("Summarize my top 5 leads") as response:
            async for chunk in response.stream_text():
                print(chunk, end="", flush=True)

With a system prompt

Section titled “With a system prompt”
system_prompt.py
agent = Agent(
    "anthropic:claude-sonnet-4-6",
    toolsets=[allmcp],
    system_prompt=(
        "You are a CRM assistant. When the user asks about contacts or deals, "
        "use the Bitrix24 tools. Always confirm before creating or updating records."
    ),
)

Multi-provider setup

Section titled “Multi-provider setup”

Connect tools from AllMCP alongside other MCP servers:

multi_provider.py
from pydantic_ai.mcp import MCPServerStreamableHTTP


agent = Agent(
    "anthropic:claude-sonnet-4-6",
    toolsets=[
        MCPServerStreamableHTTP(
            url="https://go.allmcp.co/mcp/",
            headers={"X-API-Key": "YOUR_ALLMCP_KEY"},
        ),
        MCPServerStreamableHTTP(url="https://other-mcp-server.com"),
    ],
)

Next steps

Section titled “Next steps”
Frameworks overview
Browse providers See every app you can connect and the tools each one exposes.