Retell AI MCP. Orchestrate full-scale, real-world voice interactions.
Retell AI MCP connects your agent to a full telecommunications stack. It lets your AI client handle complex voice interactions, like initiating outbound calls or registering web-based sessions. You can build and manage entire AI personas, configure their underlying language models, and analyze call transcripts for sentiment analysis—all through simple chat commands.
Give Claude and any AI agent real-world access
Directly initiate phone calls using specified source and destination numbers.
Create or update the specific instructions and models that define how an AI voice agent behaves.
Register a new web-based call session, useful for testing browser integrations.
Pull logs of all past calls or retrieve the full transcript and sentiment analysis for one specific conversation.
Check available phone numbers, text-to-speech voices, and configured agent profiles.
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What AI agents can do with Retell AI With 10 Tools
These tools let you build, configure, and audit the entire lifecycle of a voice agent's interaction, from initial setup to final transcript analysis.
Make your AI actually useful.
Add this MCP to Claude, Cursor, or Windsurf and your AI stops guessing. It gets real tools to look things up, take action, and handle the stuff you keep doing by hand.
Start using Retell AI MCPCreate Agent
Creates and deploys a new AI voice agent personality.
Create Llm
Configures the specific language model that powers an agent's conversation brain.
Create Phone Call
Initiates a new outbound call by specifying the calling and receiving numbers.
Get Call Details
Retrieves comprehensive data for a specific phone call, including transcripts and...
List Agents
Lists all AI agent profiles currently configured in the account.
List Calls
Provides a log of both historical and active calls.
List Phone Numbers
Shows all phone numbers associated with the account for calling.
List Voices
Displays every available text-to-speech voice option.
Register Web Call
Sets up a new web browser session for call testing or integration.
Update Agent
Modifies the instructions or parameters of an existing AI voice agent.
Security and governance baked right in.
Pick your AI client below to get set up. Just create a Vinkius account, subscribe, and you're instantly up and running. We handle the entire backend infrastructure, delivering out-of-the-box support for HTTPS Streamable, SSE, and OAuth2—zero messy routing required.
Choose How to Get Started
Build a custom MCP for your own tools, or connect a ready-made integration from our catalog.
Build Your Own
Turn any API into an MCP. Import a spec, define Agent Skills, or deploy with MCPFusion.
- Import from OpenAPI, Swagger, or YAML specs
- Create Agent Skills with progressive disclosure
- Deploy to edge with MCPFusion framework
- Built in DLP, auth, and compliance on each call
- Real time usage dashboard and cost metering
- Publish to catalog or keep private
Make Your AI Do More
Start with Retell AI, then connect any of our 5,200+ other servers whenever your AI needs more. One click, no limits.
- Use this MCP plus 5,200+ others, all in one place
- Add new capabilities to your AI anytime you want
- Connections are secured and governed automatically
- Track usage and costs across all your servers
- Works with Claude, ChatGPT, Cursor, and more
- New servers added to the catalog weekly
Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Retell AI. 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.
VINKIUS CLOUD
Cloud Hosted
Managed infra
V8 Isolated
Sandboxed per request
Zero-Trust Proxy
No stored credentials
DLP Enforced
Policy on each call
GDPR Compliant
EU data residency
Token Compression
~60% cost reduction
The current process for testing voice interactions is slow and painful.
Right now, setting up a test call means logging into the telephony dashboard, manually selecting numbers, configuring agent scripts in a separate GUI, hitting 'test,' waiting 20 minutes to see the transcript, then copying data into a spreadsheet for manual review. It's a cycle of clicks and context switching.
With this MCP, you simply tell your agent what you want done—for instance, 'Run a test call using Agent X.' The system handles the number selection, the connection, the recording, and makes all the results available instantly in the chat window. You get immediate action and detailed data.
Retell AI MCP Gives You Full Voice Control.
You no longer have to leave your main workflow just to manage communication assets. Listing numbers, checking voices, or adjusting an agent's core identity (using `update_agent`) happens right where you are working.
This MCP moves voice automation from a series of siloed tools into one cohesive conversational process. Your AI client becomes the central operating system for all your telecommunication needs.
What Retell AI MCP does for your AI
Your agent needs to talk on the phone? This MCP connects it directly to Retell AI’s voice platform. Instead of just chatting with text, your AI client can now orchestrate actual real-world calls. You can command your assistant to make an outbound call or set up a web browser session for testing.
It’s like giving your chatbot a functioning phone line and a full operational team behind it.
Need to manage the agents themselves? You can dynamically create new AI personalities, adjusting their core instructions and models in one go. When the calls are done, you don't have to manually sift through records; you simply ask your agent to list all historical activity or pull detailed transcripts for deep analysis.
Because this MCP lives on Vinkius, you connect once from any compatible client, giving your team access to managing voice agents and call telemetry without needing to log into a dozen separate dashboards.
019d75fe-fd3b-7223-b7a0-275b113c4ab7 How to set up Retell AI MCP
The bottom line is that you chat naturally with your AI client, and it runs the complex telephony actions for you.
Install the Retell extension module into your MCP environment.
Get your API Key from your provider account and input it into the required authentication parameter.
Tell your assistant what you want to do, like: 'List all voices, create a support agent, and test a call to 555-1234.'
Who uses Retell AI MCP
This MCP targets anyone running customer-facing automation. Think operations managers who are tired of manually checking call logs or support leads who need to spin up a new, temporary agent personality immediately.
Sets up autonomous agents that handle initial triage and qualify leads during inbound/outbound calls.
Prototypes complex voice workflows, using the MCP to manage agent configurations without building custom admin panels.
Runs batch outbound calls for follow-up or qualification, then uses call details to generate post-call reports.
Benefits of connecting Retell AI MCP
You don't need to write code to manage agents. Use the create_agent and update_agent tools to define new AI personalities and adjust their instructions via plain chat commands.
Analyze call outcomes instantly. After a conversation, use get_call_details to pull transcripts and sentiment analysis without opening any separate dashboard tabs.
Test web integrations easily. The register_web_call tool lets you set up virtual call sessions for debugging and quality assurance before going live.
Control the entire communication stack. You can check all available assets—from calling numbers via list_phone_numbers to voice options using list_voices.
Execute complex actions in one chat session. Combine tools like create_agent, create_llm, and create_phone_call into a single, natural language request.
Retell AI MCP use cases
Quality Assurance Scripting
A QA engineer needs to test how the new support bot handles objections. They ask their agent to 'Register a web call and then initiate a mock objection handling flow.' The system uses register_web_call and simulates the full interaction, allowing immediate bug reporting.
Post-Mortem Call Review
A sales manager needs to know why a deal stalled. They ask their agent, 'Show me the details for call ID 987.' The system uses get_call_details, providing the full transcript and confirming the sentiment score was negative.
Scaling Support Coverage
The support team suddenly needs a specialized agent. Instead of spending an hour in a dashboard, they ask their agent to 'Create a new fraud detection agent.' The system uses create_agent and create_llm, deploying the persona instantly.
Compliance Auditing
A compliance officer needs to audit all activity from last week. They ask their agent to 'List calls between Monday and Friday.' The system uses list_calls to pull the required log data for review.
Retell AI MCP tradeoffs
What to watch out for, and the recommended way to handle each one.
Treating it like a simple messaging tool
Thinking you just need to send text messages. Trying to use a generic chat bot for telephony tasks, which can't handle the complexity of real-time audio or number routing.
For actual voice interactions, always use create_phone_call. This tool handles the full telecommunications stack and provides necessary call logging via list_calls.
Ignoring agent management
Building a bot that works perfectly in testing but can't adapt when product requirements change. The bot needs constant manual reconfiguration.
Use the MCP to manage your agents. You can use update_agent or create_llm to instantly adjust the core instructions of an existing persona without redeploying code.
Not checking assets first
Attempting to dial a number, only to find out the calling line is inactive or the voice sounds robotic and generic.
Always check your resources first. Use list_phone_numbers before making calls, and use list_voices to ensure you select the right text-to-speech voice for quality.
When to use Retell AI MCP
Use this MCP if your core business process involves any form of two-way conversation—whether it's a phone call, a web chat simulation, or an internal routing system. Specifically, you need to programmatically act on the voice interaction (e.g., making calls, recording sessions) and then analyze the results (transcripts, sentiment). Don't use this if you just need basic data lookup; for example, listing all agents is fine with list_agents, but if you need to change those agents or make a call, you must use these tools. If your primary need is purely text-based messaging and never involves voice calls, look at dedicated chat integration MCPs instead.
Frequently asked questions about Retell AI MCP
How do I get an agent to make a call using Retell AI MCP? +
You use the create_phone_call tool by providing the required JSON payload, specifying both the calling number and the receiving number.
Can I see what voices are available with Retell AI MCP? +
Yes, you call list_voices. This tool pulls a complete list of all text-to-speech options your account supports so you can pick the best one for your agent.
What if I need to change an existing AI bot's behavior? +
You use update_agent. This tool lets you modify the instructions and parameters of a deployed agent without having to recreate it from scratch.
How do I find out what calls happened yesterday with Retell AI MCP? +
Call list_calls first for a list of all call IDs. Then, use the specific ID you found with get_call_details to retrieve transcripts and sentiment.
Does Retell AI MCP work for web browser testing? +
Yes, it does. You use register_web_call to establish a simulated web session, allowing you to test your agents in a live-like environment before deployment.