How to Use the Cal.com MCP in OpenAI Agents SDK

Q: How do I connect the Cal.com MCP Server to my OpenAI Agents SDK project?

Install the package using pip install openai-agents. Then, initialize MCPServerStreamableHttp with your Vinkius endpoint URL and pass it to your Agent constructor in the mcpservers list.

Q: Can an OpenAI Agents SDK agent reschedule a Cal.com booking?

Yes, the agent uses reschedulemeeting to change times. You can set execution guardrails in the SDK to ensure the agent validates the new time slot before making the API call.

Q: How does the Cal.com MCP Server handle meeting cancellations in OpenAI Agents SDK?

The agent invokes cancelbooking using the booking UID. The SDK logs this event in your OpenAI tracing dashboard, giving you a clear history of why and when the meeting was removed.

Build production-ready OpenAI Agents SDK systems that schedule, move, and cancel Cal.com meetings directly on your calendar.

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Connect Cal.com MCP to OpenAI Agents SDK

Create your Vinkius account to connect Cal.com to OpenAI Agents SDK and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup Cal.com with OpenAI Agents SDK

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Prevent booking conflicts with OpenAI Agents SDK

The `get_available_slots` tool lets your OpenAI Agents SDK agent pull real-time Cal.com availability before proposing a meeting. It's a direct way to stop your agent from suggesting times that are already booked, feeding clean calendar data directly into the SDK's execution context. When combined with `get_event_type_details`, your agent checks the exact meeting templates configured on your Cal.com account. The SDK applies your built-in guardrails to confirm the agent only schedules slots matching your defined working hours.

Let your agent reschedule meetings with built-in tracing

The `reschedule_meeting` tool updates existing Cal.com bookings when a client requests a time change. Your OpenAI Agents SDK agent runs this tool with precise parameters, moving the calendar event without losing the original meeting history. You can track every Cal.com modification in your OpenAI dashboard. If a user asks to cancel instead, the agent shifts execution to `cancel_booking`—that's how you keep your calendar clean without manual cleanup.

Build secure Cal.com MCP Server workflows

The `list_bookings` tool fetches upcoming Cal.com events so your agent can prepare for meetings. This MCP Server exposes your schedule safely inside the Vinkius V8 sandbox, meaning the agent only sees what you authorize. Your OpenAI Agents SDK setup uses `MCPServerStreamableHttp` to connect to the endpoint. By setting `cacheToolsList=True`, your agent caches the Cal.com tool schemas, reducing startup latency when looking up event details.

Setup guide

Set up Cal.com MCP in OpenAI Agents SDK

Prerequisites

Python 3.10+ installed
openai-agents package (pip install openai-agents)
Active Vinkius subscription with a valid endpoint token

1

Install the SDK

Run pip install openai-agents to install the OpenAI Agents SDK. The MCP integration is built-in — no extra dependencies needed.
2

Connect via SSE transport

Use MCPServerSse with your Vinkius endpoint URL. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com. The SDK auto-discovers all Cal.com tools at runtime.
3

Create your Agent

Pass the MCP to Agent(mcp_servers=[server]). The agent receives Cal.com tools as native definitions — JSON schemas resolve automatically.
4

Run the agent

Call Runner.run(agent, prompt) to execute. The agent invokes the appropriate Cal.com tools and returns structured results. Copy the full example on the right to get started.

agent.py

import asyncio
from agents import Agent, Runner
from agents.mcp import MCPServerSse

async def main():
    async with MCPServerSse(
        url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    ) as server:
        agent = Agent(
            name="Cal.com Agent",
            instructions="You have access to Cal.com tools.",
            mcp_servers=[server],
        )
        result = await Runner.run(agent, "List recent transactions")
        print(result.final_output)

asyncio.run(main())

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 Cal.com. 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.

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Common questions about Cal.com MCP in OpenAI Agents SDK

Install the package using `pip install openai-agents`. Then, initialize `MCPServerStreamableHttp` with your Vinkius endpoint URL and pass it to your Agent constructor in the `mcp_servers` list.

Yes, the agent uses `reschedule_meeting` to change times. You can set execution guardrails in the SDK to ensure the agent validates the new time slot before making the API call.

The agent invokes `cancel_booking` using the booking UID. The SDK logs this event in your OpenAI tracing dashboard, giving you a clear history of why and when the meeting was removed.

The SDK's auto-discovery mechanism prevents this by matching the agent's intent only against the 12 tools exposed by the Vinkius server. If a tool like `list_event_types` is called, the SDK validates the schema before execution.

Your booking details and availability slots stay secure because Vinkius runs the server in an isolated, zero-trust sandbox. The SDK communicates over a secure HTTP stream, and your API tokens are never exposed to the LLM.

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