# On macOS and Linux.
curl -LsSf https://astral.sh/uv/install.sh | sh

# On Windows.
powershell -ExecutionPolicy ByPass -c "irm https://astral.sh/uv/install.ps1 | iex"

# With pip.
pip install uv

# With pipx.
pipx install uv

{
    "mcpServers": {
        "merge-mcp-server": {
            "command": "uvx",
            "args": ["merge-mcp"],
            "env": {
                "MERGE_API_KEY": "your_api_key",
                "MERGE_ACCOUNT_TOKEN": "your_account_token"
            }
        }
    }
}

# Create project directory
mkdir mcp-client
cd mcp-client

# Create virtual environment
python -m venv .venv

# Activate virtual environment
# On Windows:
.venv\Scripts\activate
# On Unix or MacOS:
source .venv/bin/activate

# Install required packages
pip install mcp uv anthropic python-dotenv

# Create our main file
touch client.py

# Add your ANTHROPIC_API_KEY and MERGE_API_KEY to .env
echo "ANTHROPIC_API_KEY=<your Anthropic key here>" >> .env
echo "MERGE_API_KEY=<your Merge key here>" >> .env

# Add .env file to .gitignore
echo ".env" >> .gitignore

import os
import asyncio
from typing import Optional
from contextlib import AsyncExitStack

from mcp import ClientSession, StdioServerParameters
from mcp.client.stdio import stdio_client

from anthropic import Anthropic
from dotenv import load_dotenv

load_dotenv()  # load environment variables from .env

class MCPClient:
    def __init__(self):
        # Initialize session and client objects
        self.session: Optional[ClientSession] = None
        self.exit_stack = AsyncExitStack()
        self.anthropic = Anthropic()

    # Methods will go here

async def connect_to_server(self, linked_account_token: str):
    """Connect to an MCP server
    Args:
        linked_account_token: The token for the associated Linked Account
    """

    server_params = StdioServerParameters(
        command="uvx",
        args=["merge-mcp"],
        env={
            "MERGE_API_KEY": os.getenv("MERGE_API_KEY"),
            "MERGE_ACCOUNT_TOKEN": linked_account_token
        }
    )

    stdio_transport = await self.exit_stack.enter_async_context(stdio_client(server_params))
    self.stdio, self.write = stdio_transport
    self.session = await self.exit_stack.enter_async_context(ClientSession(self.stdio, self.write))

    await self.session.initialize()

    # List available tools
    response = await self.session.list_tools()
    tools = response.tools
    print("\nConnected to server with tools:", [tool.name for tool in tools])

async def process_query(self, query: str) -> str:
    """Process a query using Claude and available tools"""
    messages = [
        {
            "role": "user",
            "content": query
        }
    ]

    response = await self.session.list_tools()
    available_tools = [{
        "name": tool.name,
        "description": tool.description,
        "input_schema": tool.inputSchema
    } for tool in response.tools]

    # Initial Claude API call
    response = self.anthropic.messages.create(
        model="claude-3-5-sonnet-20241022",
        max_tokens=1000,
        messages=messages,
        tools=available_tools
    )

    # Process response and handle tool calls
    final_text = []
    assistant_message_content = []
    for content in response.content:
        if content.type == 'text':
            final_text.append(content.text)
            assistant_message_content.append(content)

        elif content.type == 'tool_use':
            tool_name = content.name
            tool_args = content.input

            # Get confirmation for tool call execution
            confirmation = input(f"Do you want to call tool '{tool_name}' with arguments {tool_args}? (y/n): ").strip().lower()
            if confirmation.startswith('y'):
                result = await self.session.call_tool(tool_name, tool_args)
                final_text.append(f"[Calling tool {tool_name} with args {tool_args}]")
                assistant_message_content.append(content)
                messages.append({
                    "role": "assistant",
                    "content": assistant_message_content
                })
                messages.append({
                    "role": "user",
                    "content": [
                        {
                            "type": "tool_result",
                            "tool_use_id": content.id,
                            "content": result.content
                        }
                    ]
                })

                # Get next response from Claude
                response = self.anthropic.messages.create(
                    model="claude-3-5-sonnet-20241022",
                    max_tokens=1000,
                    messages=messages,
                    tools=available_tools
                )
                final_text.append(response.content[0].text)

            else:
                final_text.append(f"[Skipped calling tool {tool_name} with args {tool_args}]")

    return "\n".join(final_text)

    async def chat_loop(self):
        """Run an interactive chat loop"""
        print("\nMCP Client Started!")
        print("Type your queries or 'quit' to exit.")

        while True:
            try:
                query = input("\nQuery: ").strip()

            if query.lower() == 'quit':
                break

            response = await self.process_query(query)
            print("\n" + response)

        except Exception as e:
            print(f"\nError: {str(e)}")

    async def cleanup(self):
        """Clean up resources"""
        await self.exit_stack.aclose()

async def main():
    client = MCPClient()
    try:
        await client.connect_to_server("<your Linked Account token here>")
        await client.chat_loop()
    finally:
        await client.cleanup()

if __name__ == "__main__":
    import sys
    asyncio.run(main())

python client.py

{
    "mcpServers": {
        "merge-mcp-server": {
            "command": "uvx",
            "args": [
                "merge-mcp",
                "--scopes",
                "ats.Job:read",
                "ats.Candidate",
                "ats.Application:write"
            ],
            "env": {
                "MERGE_API_KEY": "your_api_key",
                "MERGE_ACCOUNT_TOKEN": "your_account_token"
            }
        }
    }
}

<category>.<CommonModel>:<permission>