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Retell AI MCP Server for OpenAI Agents SDKGive OpenAI Agents SDK instant access to 11 tools to Create Voice Agent, Get Agent Config, Get Call Details, and more

Built by Vinkius GDPR 11 Tools SDK

The OpenAI Agents SDK enables production-grade agent workflows in Python. Connect Retell AI through Vinkius and your agents gain typed, auto-discovered tools with built-in guardrails. no manual schema definitions required.

Use with Your AI Agent

Ask AI about this App Connector for OpenAI Agents SDK

Open in ChatGPT Open in Claude Open in Perplexity

The Retell AI app connector for OpenAI Agents SDK is a standout in the Industry Titans category — giving your AI agent 11 tools to work with, ready to go from day one.

Vinkius delivers Streamable HTTP and SSE to any MCP client

python
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="Retell AI Assistant",
            instructions=(
                "You help users interact with Retell AI. "
                "You have access to 11 tools."
            ),
            mcp_servers=[mcp_server],
        )

        result = await Runner.run(
            agent, "List all available tools from Retell AI"
        )
        print(result.final_output)

asyncio.run(main())
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* 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 Retell AI MCP Server

Connect your Retell AI account to any AI agent and take full control of your conversational voice orchestration through natural conversation. Retell AI provides a premier platform for building human-like voice agents, and this integration allows you to create agents, initiate phone or web calls, and monitor LLM configurations directly from your chat interface.

The OpenAI Agents SDK auto-discovers all 11 tools from Retell AI through native MCP integration. Build agents with built-in guardrails, tracing, and handoff patterns. chain multiple agents where one queries Retell AI, another analyzes results, and a third generates reports, all orchestrated through Vinkius.

What you can do

  • Agent & Persona Orchestration — List all managed voice agents and retrieve detailed persona metadata, including creating new agents programmatically.
  • Call Lifecycle Management — Initiate and monitor real-time phone or web calls and retrieve detailed call metadata including recordings and transcripts directly from the AI interface.
  • LLM & Brain Control — Access and monitor your Retell LLM configurations to ensure your agents always have the correct logic and knowledge via natural language.
  • Phone Number Intelligence — List available phone numbers to maintain a clear overview of your telephony infrastructure.
  • Operational Monitoring — Track system responses and manage agent settings using simple AI commands to ensure your voice operations are always optimized.

The Retell AI MCP Server exposes 11 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.

All 11 Retell AI tools available for OpenAI Agents SDK

When OpenAI Agents SDK connects to Retell AI through Vinkius, your AI agent gets direct access to every tool listed below — spanning voice-ai, conversational-ai, telephony, and more. Every call is secured with network, filesystem, subprocess, and code evaluation entitlements inside a sandboxed runtime. Beyond a simple connection, you get a full AI Gateway with real-time visibility into agent activity, enterprise governance, and optimized token usage.

create_voice_agent

Create a new AI voice agent

get_agent_config

Get details for a voice agent

get_call_details

Get details and transcript for a call

get_llm_details

Get metadata for a response engine

get_phone_number

Get details for a specific phone number

list_recent_calls

List call logs and history

list_retell_llms

List internal response engines

list_retell_numbers

List registered phone numbers

list_voice_agents

List all AI voice agents

start_phone_call

Initiate an outbound phone call

start_web_call

Initialize a browser-based call

Connect Retell AI to OpenAI Agents SDK via MCP

Follow these steps to wire Retell AI into OpenAI Agents SDK. The entire setup takes under two minutes — your credentials stay safe behind the Vinkius.

01

Install the SDK

Run pip install openai-agents in your Python environment
02

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token from cloud.vinkius.com
03

Run the script

Save the code above and run it: python agent.py
04

Explore tools

The agent will automatically discover 11 tools from Retell AI

Why Use OpenAI Agents SDK with the Retell AI MCP Server

OpenAI Agents SDK provides unique advantages when paired with Retell AI through the Model Context Protocol.

01

Native MCP integration via `MCPServerSse`, pass the URL and the SDK auto-discovers all tools with full type safety

02

Built-in guardrails, tracing, and handoff patterns let you build production-grade agents without reinventing safety infrastructure

03

Lightweight and composable: chain multiple agents and MCP servers in a single pipeline with minimal boilerplate

04

First-party OpenAI support ensures optimal compatibility with GPT models for tool calling and structured output

Retell AI + OpenAI Agents SDK Use Cases

Practical scenarios where OpenAI Agents SDK combined with the Retell AI MCP Server delivers measurable value.

01

Automated workflows: build agents that query Retell AI, process the data, and trigger follow-up actions autonomously

02

Multi-agent orchestration: create specialist agents. one queries Retell AI, another analyzes results, a third generates reports

03

Data enrichment pipelines: stream data through Retell AI tools and transform it with OpenAI models in a single async loop

04

Customer support bots: agents query Retell AI to resolve tickets, look up records, and update statuses without human intervention

Example Prompts for Retell AI in OpenAI Agents SDK

Ready-to-use prompts you can give your OpenAI Agents SDK agent to start working with Retell AI immediately.

01

"List all my voice agents in Retell AI."

02

"Show me all AI voice agents and their call statistics from the last 7 days."

03

"Create a new outbound phone call using the Sales Qualifier agent to contact a prospect."

Troubleshooting Retell AI MCP Server with OpenAI Agents SDK

Common issues when connecting Retell AI to OpenAI Agents SDK through the Vinkius, and how to resolve them.

01

MCPServerStreamableHttp not found

Ensure you have the latest version: pip install --upgrade openai-agents
02

Agent not calling tools

Make sure your prompt explicitly references the task the tools can help with.

Retell AI + OpenAI Agents SDK FAQ

Common questions about integrating Retell AI MCP Server with OpenAI Agents SDK.

01

How does the OpenAI Agents SDK connect to MCP?

Use MCPServerSse(url=...) to create a server connection. The SDK auto-discovers all tools and makes them available to your agent with full type information.
02

Can I use multiple MCP servers in one agent?

Yes. Pass a list of MCPServerSse instances to the agent constructor. The agent can use tools from all connected servers within a single run.
03

Does the SDK support streaming responses?

Yes. The SDK supports SSE and Streamable HTTP transports, both of which work natively with Vinkius.