The true power of modern AI assistants lies in their ability to connect with other specialized AI systems to extend their capabilities. While your existing AI can draft emails, analyze data, and generate content, what if it could seamlessly make actual AI phone calls? Retell has this covered with our proprietary MCP (Multichannel Communication Platform) Server integration.
By connecting your AI assistant to Retell AI's voice agent technology, you unlock a new dimension of business automation potential through the ability to initiate and conduct sophisticated AI phone calls, without human intervention, using your favorite AI assistants like ChatGPT, Claude, Grok, and many more. This integration represents the next evolution in AI capabilities: systems that can communicate across platforms and channels to deliver comprehensive and hyper efficient solutions.
This step-by-step guide will show you how to bridge the gap between your digital AI assistant and Retell's world of AI voice communication to create a powerful ecosystem of interconnected AI capabilities, especially cutting edge AI call automation.
See the reosurces necessary for establishing the MCP server connection instructions and code:
Retell MCP Server Package (NPM)
Retell MCP Server Repository (Github)
Before diving into the technical setup, let's explore why connecting your AI assistant to Retell AI's voice agents creates a powerful competitive advantage:
Unify Digital and Voice Channels for Seamless Customer Journeys: Retell AI's voice agents enable AI assistants to handle phone calls with human-like fluency, creating a cohesive experience across channels.
A 2023 study by Gartner found that 63% of customers prefer businesses offering consistent interactions across digital and voice platforms, boosting retention by up to 20%.
Convert Data Insights into Human Conversations: Retell AI's voice agents uses the very same advanced LLMs that power your AI assistant to engage in complex phone conversations. This allows your AI assistant to act on digital data, like customer preferences or purchase history, during calls.
Gather Rich Voice-Based Insights Automatically: By deploying Retell AI's voice agents, your AI assistant can conduct tasks with customers through automated phone calls to collect things like feedback, verify information, or schedule appointments.
A 2024 survey by Forrester revealed that businesses using AI-driven voice interactions reduced data collection costs by 30% compared to manual call centers, while capturing more accurate customer insights.
Turn Notifications into Interactive Dialogues: Retell AI's voice agents transform static notifications (e.g., appointment reminders) into dynamic, two-way personalized conversations, that enrich customer experience and enhance trust.
Enable Complex Decision-Making with Voice Data: Retell AI's integration empowers your AI assistant to analyze phone call outcomes and initiate sophisticated, multi-step processes. It can adjust things like schedules, update records, or escalate issues based on real-time voice interactions that ultimately streamline operations and enhance decision making.
Getting started with Retell AI's voice agent technology is straightforward, even for those without technical expertise. Follow these steps to integrate the MCP server with your AI assistant, here we are going to be basing it off connecting it to Claude:
1. Open Claude -> Select "Settings" from the available options
2. Click on "Developer" in the settings menu
3. Select "Edit Config" to access your configuration settings
4. Open the JSON file using your preferred code editor
5. Visit the Retell AI MCP server NPM page and copy the configuration snippet
6. Paste the configuration into your JSON file,
7. Generate a new Retell AI API token if you don't already have one
8. Replace the placeholder in your configuration with your newly generated API token
9. Save your configuration file
10. Restart Claude completely (quit and reopen the application) to register the new server
Important Note: When using the Retell AI MCP server for the first time, you may be prompted to grant permissions. You can choose to "Always Allow" for seamless future use.
After completing these steps, you'll be able to find the Retell AI MCP server in your tools list in Claude, confirming successful integration.
Once integrated, you can immediately start exploring the powerful capabilities of Retell AI's voice agent technology through Claude. Since it's fully integrated you can find out and act on any information in Retell AI through Claude, here's some examples:
The true power of Retell AI lies in its ability to conduct human-like phone conversations. Here's how to initiate your first AI phone call:
During the call, your AI voice agent will:
Perhaps the most revolutionary aspect of Retell AI is the ability to create sophisticated voice agents from a single prompt. This capability dramatically reduces the technical barriers to implementing AI phone automation, letting you take charge of optimizing your call operations your way. Here's how:
To further refine an AI voice agent for the most optimal and efficient telephony, LLMs, conversation pathways, etc. we highly recommend you use the Retell AI platform for best results.
"Create an agent that calls my local pizza shop. Keep it brief. Order a margarita pizza and a Diet Coke. Payment cash on delivery. Address: 123 Main Street. Agent pretends to be me (John). Make an outbound call using USA number. Name the agent Pizza Orderer."
From this single instruction, the Retell AI MCP server handles the entire setup process without any additional configuration required, turning complex AI implementation into a simple conversation.
After completing calls, you can analyze their performance:
These insights help you refine your approach and understand the effectiveness of your automated communication strategy.
For security, compliance, or organizational purposes, you can easily manage your call records:
Retell AI's voice agent technology opens up numerous practical applications for businesses looking to streamline operations:
The integration of Retell AI's MCP server with your existing AI assistant environment represents more than just a new feature, it's a fundamental shift in what's possible with enterprise AI voice agents. By connecting your digital AI capabilities to voice communication channels through Retell AI, you're building an interconnected AI ecosystem where:
Forward-thinking enterprises are no longer satisfied with isolated AI capabilities. The competitive advantage comes from creating sophisticated AI systems that work together, sharing information and capabilities to create comprehensive business solutions with voice agents handling the critical human touchpoints through AI phone calls. For a more detailed looked into enterprise AI voice agents, read our comprehensive 2025 B2B Guide to AI Phone Calls.
With Retell AI's voice agents connected to your existing AI assistant, you're positioning your organization at the forefront of this AI integration revolution, creating new possibilities for automation, customer engagement, and operational efficiency like never seen before.
Ready to see how Retell AI can transform your business communication? Contact our team for a personalized demonstration and discover the full potential of AI voice agents for your specific needs.
See how much your business could save by switching to AI-powered voice agents.
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Revolutionize your call operation with Retell.