JustCall MCP Server for OpenAI Agents SDK 10 tools — connect in under 2 minutes
The OpenAI Agents SDK enables production-grade agent workflows in Python. Connect JustCall through the Vinkius and your agents gain typed, auto-discovered tools with built-in guardrails — no manual schema definitions required.
ASK AI ABOUT THIS MCP SERVER
Vinkius supports streamable HTTP and SSE.
import asyncio
from agents import Agent, Runner
from agents.mcp import MCPServerStreamableHttp
async def main():
# Your Vinkius token — get it at cloud.vinkius.com
async with MCPServerStreamableHttp(
url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
) as mcp_server:
agent = Agent(
name="JustCall Assistant",
instructions=(
"You help users interact with JustCall. "
"You have access to 10 tools."
),
mcp_servers=[mcp_server],
)
result = await Runner.run(
agent, "List all available tools from JustCall"
)
print(result.final_output)
asyncio.run(main())
* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure
About JustCall MCP Server
Empower your AI agents with JustCall's cloud phone system. This MCP server allows you to list and retrieve phone calls, track SMS/MMS messages, manage contacts, and access call recordings directly through the JustCall API. Ideal for automating communication workflows and sales engagement.
The OpenAI Agents SDK auto-discovers all 10 tools from JustCall through native MCP integration. Build agents with built-in guardrails, tracing, and handoff patterns — chain multiple agents where one queries JustCall, another analyzes results, and a third generates reports, all orchestrated through the Vinkius.
The JustCall MCP Server exposes 10 tools through the Vinkius. Connect it to OpenAI Agents SDK in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.
How to Connect JustCall to OpenAI Agents SDK via MCP
Follow these steps to integrate the JustCall MCP Server with OpenAI Agents SDK.
Install the SDK
Run pip install openai-agents in your Python environment
Replace the token
Replace [YOUR_TOKEN_HERE] with your Vinkius token from cloud.vinkius.com
Run the script
Save the code above and run it: python agent.py
Explore tools
The agent will automatically discover 10 tools from JustCall
Why Use OpenAI Agents SDK with the JustCall MCP Server
OpenAI Agents SDK provides unique advantages when paired with JustCall through the Model Context Protocol.
Native MCP integration via `MCPServerSse` — pass the URL and the SDK auto-discovers all tools with full type safety
Built-in guardrails, tracing, and handoff patterns let you build production-grade agents without reinventing safety infrastructure
Lightweight and composable: chain multiple agents and MCP servers in a single pipeline with minimal boilerplate
First-party OpenAI support ensures optimal compatibility with GPT models for tool calling and structured output
JustCall + OpenAI Agents SDK Use Cases
Practical scenarios where OpenAI Agents SDK combined with the JustCall MCP Server delivers measurable value.
Automated workflows: build agents that query JustCall, process the data, and trigger follow-up actions autonomously
Multi-agent orchestration: create specialist agents — one queries JustCall, another analyzes results, a third generates reports
Data enrichment pipelines: stream data through JustCall tools and transform it with OpenAI models in a single async loop
Customer support bots: agents query JustCall to resolve tickets, look up records, and update statuses without human intervention
JustCall MCP Tools for OpenAI Agents SDK (10)
These 10 tools become available when you connect JustCall to OpenAI Agents SDK via MCP:
get_call
Includes timestamps, participants, and associated notes. Use this for deep investigation of a specific communication event. Retrieves details for a specific call
get_contact
Returns associated phone numbers, email addresses, and metadata. Use this for detailed customer vetting before or after a call. Retrieves details for a specific contact
list_calls
Returns call direction (inbound/outbound), duration, status, and IDs. Use this to audit communication activity or track call volumes. Lists all phone calls
list_campaigns
g., dialer campaigns). Useful for monitoring sales outreach and telemarketing efforts. Lists all calling campaigns
list_contacts
Returns names, phone numbers, and IDs. Use this to search for customers or provide contact information to the user. Lists all contacts in JustCall
list_messages
Includes message content, sender/receiver, and delivery status. Essential for monitoring text-based customer interactions. Lists all SMS/MMS messages
list_numbers
Useful for identifying which numbers are available for specific campaigns or teams. Lists all phone numbers in your JustCall account
list_recordings
Use this when the user wants to audit call quality or retrieve a specific conversation record. Lists all call recordings
list_users
Useful for identifying which agent handled a specific call or message. Lists all users in your organization
list_webhooks
Useful for auditing system integrations. Lists all configured webhooks
Example Prompts for JustCall in OpenAI Agents SDK
Ready-to-use prompts you can give your OpenAI Agents SDK agent to start working with JustCall immediately.
"List all recent phone calls in JustCall."
"Show me the latest SMS messages."
"Check the details for contact ID '123'."
Troubleshooting JustCall MCP Server with OpenAI Agents SDK
Common issues when connecting JustCall to OpenAI Agents SDK through the Vinkius, and how to resolve them.
MCPServerStreamableHttp not found
pip install --upgrade openai-agentsAgent not calling tools
JustCall + OpenAI Agents SDK FAQ
Common questions about integrating JustCall MCP Server with OpenAI Agents SDK.
How does the OpenAI Agents SDK connect to MCP?
MCPServerSse(url=...) to create a server connection. The SDK auto-discovers all tools and makes them available to your agent with full type information.Can I use multiple MCP servers in one agent?
MCPServerSse instances to the agent constructor. The agent can use tools from all connected servers within a single run.Does the SDK support streaming responses?
Connect JustCall with your favorite client
Step-by-step setup guides for every MCP-compatible client and framework:
Anthropic's native desktop app for Claude with built-in MCP support.
AI-first code editor with integrated LLM-powered coding assistance.
GitHub Copilot in VS Code with Agent mode and MCP support.
Purpose-built IDE for agentic AI coding workflows.
Autonomous AI coding agent that runs inside VS Code.
Anthropic's agentic CLI for terminal-first development.
Python SDK for building production-grade OpenAI agent workflows.
Google's framework for building production AI agents.
Type-safe agent development for Python with first-class MCP support.
TypeScript toolkit for building AI-powered web applications.
TypeScript-native agent framework for modern web stacks.
Python framework for orchestrating collaborative AI agent crews.
Leading Python framework for composable LLM applications.
Data-aware AI agent framework for structured and unstructured sources.
Microsoft's framework for multi-agent collaborative conversations.
Connect JustCall to OpenAI Agents SDK
Get your token, paste the configuration, and start using 10 tools in under 2 minutes. No API key management needed.