Haystack

pip install haystack-ai haystack-integrations anthropic-haystack mcp python-dotenv

CIVIC_URL=https://nexus.civic.com/hub/mcp?profile=your-toolkit
CIVIC_TOKEN=your-civic-token
ANTHROPIC_API_KEY=your-anthropic-key

import os
import asyncio
from dotenv import load_dotenv
from mcp.client.streamable_http import streamablehttp_client
from mcp import ClientSession
from haystack_integrations.tools.mcp import MCPTool, StreamableHttpServerInfo
from haystack.utils import Secret
from haystack_integrations.components.generators.anthropic import AnthropicChatGenerator
from haystack.dataclasses import ChatMessage

load_dotenv()

CIVIC_URL = os.environ["CIVIC_URL"]
CIVIC_TOKEN = os.environ["CIVIC_TOKEN"]

async def get_tool_names():
    """Discover available tool names from the Civic MCP Hub."""
    headers = {"Authorization": f"Bearer {CIVIC_TOKEN}"}
    async with streamablehttp_client(CIVIC_URL, headers=headers) as (r, w, _):
        async with ClientSession(r, w) as session:
            await session.initialize()
            result = await session.list_tools()
            return [t.name for t in result.tools]

def build_pipeline(tool_names):
    server_info = StreamableHttpServerInfo(
        url=CIVIC_URL,
        token=Secret.from_env_var("CIVIC_TOKEN"),
    )
    civic_tools = [MCPTool(name=name, server_info=server_info) for name in tool_names]

    generator = AnthropicChatGenerator(
        model="claude-sonnet-4-6",
        tools=civic_tools,
    )
    return generator, civic_tools

def main():
    tool_names = asyncio.run(get_tool_names())
    print(f"{len(tool_names)} tools discovered")

    generator, _ = build_pipeline(tool_names)

    messages = [
        ChatMessage.from_system("You are a helpful assistant with access to Civic tools."),
        ChatMessage.from_user("What events do I have today?"),
    ]
    response = generator.run(messages=messages)
    print(response["replies"][0].text)

main()

CIVIC_URL=https://nexus.civic.com/hub/mcp?profile=your-production-toolkit