MCP server · liveClaude · OpenAI · Gemini · Make

Give your AI agent
a voice.

Describe who to call. Your agent handles the conversation. One MCP server plugs Callsy into Claude, OpenAI, Gemini, Make, or any AI workflow. And your agent picks up the phone.

Start building→Book a demo ↗
5-minute setup · works with Claude, OpenAI, Gemini · 7-day money-back
Agent call log · 0:42Live
E
Emma
Cart recovery agent · EN
Phone
Emma
Hi Sarah. Emma from Northgate. Saw you left some great items in your cart.
Sarah
Oh yeah, I wasn't sure about the sizing.
Emma
Those run true to size. I can offer 10% off if you'd like to wrap it up today.
Sarah
Sure, that works. Use the same card.
audio
€127.40

Trusted by 261+ brands across e-commerce, healthcare, and SaaS

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The problem

Your AI can do everything.
Except pick up the phone.

Your agent browses the web, writes code, manages databases. But the moment a workflow needs a real phone call. A lead follow-up, a booking confirmation. It goes silent.

3–6×phone calls convert higher than email or SMS
Outreach channels · real engagement

Phone is still where the deals close.

✉
Email
5%open rate

Buried under inbox clutter. Rarely read.

💬
SMS
<1%click rate

Filtered, ignored, often blocked.

Best
📞
Phone with Callsy
78%answer rate

Real conversation. Instant response.

How it works

From prompt to phone call
in 60 seconds.

STEP 01

Connect

Add Callsy's MCP server to Claude, OpenAI, Gemini, or any AI tool. Five-minute setup.

STEP 02

Describe

Tell your agent who to call and why. Plain English. That's it.

STEP 03

Call

Callsy's voice agent makes the call, handles the conversation, and reports back with full transcripts.

claude_desktop_config.json
{
  "mcpServers": {
    "callsy": {
      "url": "https://mcp.callsy.ai/sse"
    }
  }
}
That's the whole config. Restart Claude. Your agent now has a phone.
Every AI · One server

One MCP server.
Every AI agent.

Connect Callsy to any AI workflow. Your agent triggers calls, Callsy handles the rest.

⇢ Inputs
Claude
OpenAI
Gemini
Make
Custom API
MCP Engine
Callsy
Creates agent → makes call →
returns transcript
Outputs ⇢
🛒Cart recovery
📞Lead follow-up
📅Booking
💬Support
💳Payment reminder
✨Custom workflows
Leads captured
Automatically
Transcripts
Real-time delivery
Analytics
Sentiment + outcome
MCP tools · 27 total

Full voice automation, exposed.

Every Callsy capability is a first-class MCP tool. Agents, contacts, calls, and full workflow graphs. All callable from your AI.

AgentsSpin up voice agents with custom personality & guardrails.
  • list_agents

    Fetch all your voice agents with their config and current status.

  • get_agent

    Retrieve full details of a specific agent by ID. Script, voice, guardrails.

  • create_agent

    Spin up a new voice agent with custom personality, script, and guardrails.

  • update_agent

    Modify an agent's script, voice, personality, or behavior rules.

  • delete_agent

    Permanently remove a voice agent from your workspace.

Voices · 50+ across 70+ languages

Speak your customer's language.

50+
Voices
40+
Languages
20+
Accents
Customer stories

Brands that actually picked up the phone.

Trusted by 260+ businesses across 12 countries

Neurogena
$40K+
additional revenue
Verified customer
Shopify App Store review, verified merchant
“Highly recommend! Easy to use, well-priced, and with great potential to grow. We now made over 40k in additional revenue using Callsy!”
Neurogena
Shopify Merchant
Read the full case study→
AmourLinen
34x
ROI on Callsy spend
Verified customer
Shopify App Store review, verified merchant
“Great app for recovering abandoned cart purchases. Been using it for the last 3 months, we get around 34x ROI. Team is very responsive and constantly developing new features!”
AmourLinen
Shopify Merchant
Read the full case study→
Read the full case studies
FAQ

The questions we get most.

Still have questions? hello@callsy.ai
30,000+ calls made this month

Ready to give your agent
a voice?

Join 261+ merchants already using AI voice agents to close more deals.

Get started free→Book a demo
5-minute setup No credit card required 7-day money-back guarantee