How do I use multiple MCP servers (Exa, Cal.com) with OpenAI?

OpenAI supports using multiple MCP servers simultaneously through function calling. You can configure each Exa, Cal.com server independently and combine their tools in a single OpenAI chat completion request. This enables powerful multi-service AI applications where your OpenAI models can access data and perform actions across Exa, Cal.com within a single conversation. Klavis AI simplifies multi-server management with centralized configuration and unified tool formatting for OpenAI function calling.

What are the benefits of using Exa and Cal.com together with OpenAI?

Combining Exa and Cal.com with OpenAI creates powerful synergies for advanced AI applications. Each service brings unique capabilities that complement each other, enabling comprehensive data access, cross-platform automation, and enhanced AI responses with multi-source information gathering and action execution.

Do I need special packages for OpenAI MCP server integration?

You only need the standard OpenAI Python or TypeScript/JavaScript client library. Klavis AI handles all the MCP server communication and formats the tools specifically for OpenAI's function calling format. Our platform provides detailed setup instructions, code examples for both Python and TypeScript, and troubleshooting guides to ensure smooth integration with your existing OpenAI applications.

How does function calling work with MCP servers in OpenAI?

MCP servers integrate with OpenAI through the function calling feature. Klavis AI automatically formats MCP server tools as OpenAI functions, allowing your models to call them naturally during conversations. When the model needs to use a tool, it generates a function call, which is then executed against the MCP server, and the results are returned to continue the conversation flow.

How do I handle authentication for MCP servers with OpenAI?

Authentication for MCP servers is handled by Klavis AI, separate from your OpenAI API key. Each MCP server may require different authentication methods (API keys, OAuth tokens, etc.). Klavis AI manages the authentication flow automatically once you provide the necessary credentials, ensuring secure access to external services while your OpenAI integration remains simple and clean.

Can I use streaming responses with these MCP servers and OpenAI?

Yes, OpenAI's streaming responses work seamlessly with MCP server integration. When using function calling with streaming, OpenAI will stream the model's reasoning and then execute function calls as needed. These MCP servers support real-time data access, making streaming responses even more dynamic and responsive. Klavis AI optimizes the connection for low-latency streaming scenarios.

What types of OpenAI applications benefit most from MCP server integration?

OpenAI applications that benefit most include: customer service chatbots needing real-time data access, AI assistants that perform actions across multiple platforms, content generation tools requiring up-to-date information, and conversational AI that needs to integrate with business systems. MCP servers extend OpenAI beyond text generation to become powerful action-oriented AI agents.

How does MCP server integration affect OpenAI API costs and performance?

MCP server integration may increase token usage slightly due to function definitions being included in requests, but the cost impact is typically minimal compared to the added functionality. The integration adds minimal latency for tool calls. Best practices include using appropriate timeouts, implementing retry logic, and caching frequently accessed data. Klavis AI provides cost optimization recommendations and performance monitoring to help you manage both OpenAI API costs and MCP server usage efficiently.

Why choose Klavis AI for OpenAI MCP server connections?

Klavis AI provides the most comprehensive platform for OpenAI MCP server integration with features like automatic function calling formatting, one-click server setup, detailed OpenAI-specific documentation and code examples, secure credential management, and performance optimization guides. Our platform is specifically designed to make OpenAI + MCP server integration as seamless as possible for developers building advanced conversational AI and agent applications. With Klavis AI's centralized management dashboard, you can monitor all your MCP server connections, track OpenAI API usage, and troubleshoot issues from a single interface.

Connectto Exa, Cal.com MCP Servers

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Exa

featured

Exa is an AI-powered search engine designed for AI applications. Use neural search to understand meaning and context, find similar content, get direct answers with citations, and conduct comprehensive research with structured analysis

Available Tools:

exa_search
exa_get_contents
exa_find_similar
+2 more tools

Cal.com

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Cal.com is an open-source scheduling platform that helps you schedule meetings without the back-and-forth emails. Manage event types, bookings, availability, and integrate with calendars for seamless appointment scheduling

Quick Setup Guide

Follow these steps to connect OpenAI to these MCP servers

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Configure Connections

Add your desired MCP servers to OpenAI and configure authentication settings.

Test & Deploy

Verify your connections work correctly and start using your enhanced AI capabilities.

OpenAI + KlavisAI Integration Snippets

View Documentation

import json
import os
from openai import OpenAI
from klavis import Klavis
from klavis.types import McpServerName, ConnectionType, ToolFormat

# Initialize clients
openai_client = OpenAI(api_key=os.getenv("OPENAI_API_KEY"))
klavis_client = Klavis(api_key=os.getenv("KLAVIS_API_KEY"))

# Constants
OPENAI_MODEL = "gpt-4o-mini"

exa_mcp_instance = klavis_client.mcp_server.create_server_instance(
    server_name=McpServerName.EXA,
    user_id="1234",
    connection_type=ConnectionType.STREAMABLE_HTTP,
)

cal.com_mcp_instance = klavis_client.mcp_server.create_server_instance(
    server_name=McpServerName.CAL.COM,
    user_id="1234",
    connection_type=ConnectionType.STREAMABLE_HTTP,
)

# Get tools from all MCP servers
exa_tools = klavis_client.mcp_server.list_tools(
    server_url=exa_mcp_instance.server_url,
    connection_type=ConnectionType.STREAMABLE_HTTP,
    format=ToolFormat.OPENAI,
)
cal.com_tools = klavis_client.mcp_server.list_tools(
    server_url=cal.com_mcp_instance.server_url,
    connection_type=ConnectionType.STREAMABLE_HTTP,
    format=ToolFormat.OPENAI,
)

# Combine all tools
all_tools = []
all_tools.extend(exa_tools)
all_tools.extend(cal.com_tools)

messages = [
    {"role": "system", "content": "You are a helpful assistant."},
    {"role": "user", "content": user_message}
]
        
response = openai_client.chat.completions.create(
    model=OPENAI_MODEL,
    messages=messages,
    tools=all_tools if all_tools else None
)

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ConnectOpenAIto Exa, Cal.com MCP Servers

Exa