How to Use the JustCall MCP in OpenAI Agents SDK

Give your OpenAI Agents SDK production system direct access to JustCall voice and SMS data with strict execution guardrails.

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Connect JustCall MCP to OpenAI Agents SDK

Create your Vinkius account to connect JustCall 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 JustCall with OpenAI Agents SDK

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Claude

Perplexity

Audit communications via MCP Server

The `justcall-mcp` exposes 10 distinct tools to your OpenAI Agents SDK deployment. Your agent can pull exact communication records using `get_call` to investigate participant timestamps and linked notes without exposing raw API keys. This framework enforces strict safety constraints. You get full tracing in the OpenAI dashboard every time the agent invokes `list_messages`. If an agent tries to pull thousands of SMS records at once, your guardrails catch the request before execution fires.

Route customer support escalations

This JustCall integration lets specialized agents handle specific tasks. You can configure a triage agent to run `list_recordings` and `get_contact`, pulling the audio file and customer vetting data simultaneously. The triage agent gathers that context and hands off the session to an escalation agent. That second agent already knows the call duration and status from `list_calls`. It acts on verified interactions instead of asking the user to repeat themselves.

Monitor sales outreach metrics

Your agent uses this integration to parse raw campaign data for dialer performance. It executes `list_campaigns` to grab active telemarketing efforts. Then it cross-references the results with `list_users` to see exactly which rep handled the volume. Forget writing custom polling logic. The agent pulls available internal lines via `list_numbers` and maps them to those specific reps. Everything routes through the standard HTTP context manager to keep your production deployment clean.

Setup guide

Set up JustCall 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 JustCall tools at runtime.
3

Create your Agent

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

Run the agent

Call Runner.run(agent, prompt) to execute. The agent invokes the appropriate JustCall 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="JustCall Agent",
            instructions="You have access to JustCall tools.",
            mcp_servers=[server],
        )
        result = await Runner.run(agent, "List recent transactions")
        print(result.final_output)

asyncio.run(main())

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Common questions about JustCall MCP in OpenAI Agents SDK

Install openai-agents via pip. Create an MCPServerStreamableHttp instance with your endpoint URL and pass that directly to the mcp_servers array in your Agent constructor.

Yes. The framework automatically reads the MCP schema upon connection. Set cacheToolsList to true to speed up initialization for endpoints like list_contacts and list_webhooks.

You define execution guardrails in your agent setup. Restrict its permissions to list_messages and block voice tools if you only want the agent reading text interactions.

It works exactly like any other toolset. A research agent can run get_contact to vet a customer and pass that structured profile to a support agent for resolution.

This integration accesses highly sensitive voice recordings and direct SMS transcripts. Your endpoint token authenticates the connection. The V8 isolate sandbox destroys the environment immediately after the query finishes.

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