What is MCP and do I need to understand it?

MCP (Model Context Protocol) is an open standard that lets AI agents connect to external tools. Think of it as a universal adapter. You don’t need to understand it — just connect Callsy to your AI tool and it works.

Does Callsy work with OpenClaw?

Absolutely. Callsy’s MCP server integrates directly with OpenClaw agents. Add it as a skill and your autonomous agent can create voice personas, initiate calls, and check outcomes — all within the agent loop.

Do I need to be technical to use this?

Not at all. If you can type a sentence, you can use Callsy. Describe your call in plain English.

What does the AI voice sound like?

Natural and conversational — not robotic. You choose from multiple voice profiles and customize tone, pace, and personality to match your brand.

Can the AI handle objections?

Yes. You define the playbook — common objections, discount authority, escalation triggers. The agent follows your rules and can warm-transfer to a human at any point.

Is there a free trial?

Yes — the free tier includes 10 calls with no credit card. All paid plans also come with a 7-day money-back guarantee.

GiveYourAIAgentaVoice

Describe who to call. Your agent handles the conversation.

Start Building

Book a demo

Prompt

MCPinitiate_call · create_agent

Emma

Cart Recovery Agent

Connected

0:42

Emma:Hi Sarah, I noticed you left some items in your cart...

Customer:Oh yes, I got distracted at work.

Emma:No worries! I can offer free shipping on that order.

Backed by

500 Global×Firstpick VC

#3 Top CompanyAI (Artificial Intelligence)

F6SMar '26

Trusted by 261 merchants • Works with Claude, OpenClaw, GPT & more

Works with Claude

Claude•

OpenClaw•

OpenAI•

Gemini•

Make•

Lovable•+40integrations

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.

Phone calls convert 3–6× higher than email or SMS.

See how Callsy fixes this

Outreach channels · real engagement

5–0%open rate

Buried under inbox clutter. Rarely read.

SMS

<0%click rate

Filtered, ignored, often blocked.

Phone

with Callsy

0%answer rate

Real conversation. Instant response.

How It Works

From prompt to phone call
in 60 seconds

Connect

Add Callsy’s MCP server to Claude, OpenClaw, or any AI tool. Five-minute setup.

Describe

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

Call

Callsy’s voice agent makes the call, handles the conversation, and reports back.

mcp_config.json

{
  "mcpServers": {
    "callsy": {
      "url": "https://mcp.callsy.ai/sse"
    }
  }
}

Every AI Agent

One MCP server · Every AI agent

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

Input

Claude

Anthropic MCP

OpenClaw

Agent Skills

GPT / Custom

API Integration

Engine

Callsy MCP

Creates agent, makes call, returns transcript

Output

Cart Recovery

Lead Follow-up

Appointment Booking

Customer Support

Payment Reminder

+ More

LeadsCaptured automatically

TranscriptsReal-time delivery

AnalyticsCall sentiment & outcome

Real-Time Analytics

Every call. Every insight.
Every outcome

Track call performance, read full transcripts, and let AI analyze sentiment — all in real time. Your agent gets smarter with every conversation.

Try the analytics dashboard

Total Calls

+12%

Connected

+5%

Converted

+18%

CallsConversions

Apr 7Apr 8Apr 9Apr 10Apr 11Apr 12Apr 13

USE CASES

Built for every voice workflow

Click any use case to see how Callsy handles it — complete with real conversation samples and performance metrics.

Cart Recovery

callsy.ai · voice agent active

Live

32%

Recovery Rate

1m 47s

Avg Call Time

$47K/mo

Revenue Saved

Sample Conversation

Agent:Hi Sarah, I noticed you left some great items in your cart — the running shoes and water bottle. Can I help with anything?

Customer:Oh yeah, I wasn't sure about the sizing.

Agent:Great question! Those run true to size. And I can offer 10% off if you'd like to complete your order today.

VOICES

50+ voices · 40+ languages
Speak your customer's language

Every agent picks a voice that fits your brand — warm, professional, energetic, or polite. Sample a few below.

50+

Voices

40+

Languages

20+

Accents

· and 40+ more languages ·

🇺🇸English · US

🇬🇧English · UK

🇦🇺English · AU

🇨🇦English · CA

🇪🇸Spanish

🇲🇽Spanish · MX

🇦🇷Spanish · AR

🇫🇷French

🇨🇦French · CA

🇩🇪German

🇦🇹German · AT

🇨🇭Swiss German

🇮🇹Italian

🇵🇱Polish

🇵🇹Portuguese

🇧🇷Portuguese · BR

🇳🇱Dutch

🇧🇪Flemish

🇸🇪Swedish

🇳🇴Norwegian

🇩🇰Danish

🇫🇮Finnish

🇮🇪Irish English

🇮🇸Icelandic

🇺🇸English · US

🇬🇧English · UK

🇦🇺English · AU

🇨🇦English · CA

🇪🇸Spanish

🇲🇽Spanish · MX

🇦🇷Spanish · AR

🇫🇷French

🇨🇦French · CA

🇩🇪German

🇦🇹German · AT

🇨🇭Swiss German

🇮🇹Italian

🇵🇱Polish

🇵🇹Portuguese

🇧🇷Portuguese · BR

🇳🇱Dutch

🇧🇪Flemish

🇸🇪Swedish

🇳🇴Norwegian

🇩🇰Danish

🇫🇮Finnish

🇮🇪Irish English

🇮🇸Icelandic

🇯🇵Japanese

🇰🇷Korean

🇨🇳Mandarin

🇹🇼Mandarin · TW

🇮🇳Hindi

🇮🇳Tamil

🇮🇳Bengali

🇦🇪Arabic · Gulf

🇸🇦Arabic · SA

🇪🇬Arabic · EG

🇹🇷Turkish

🇷🇺Russian

🇺🇦Ukrainian

🇬🇷Greek

🇮🇱Hebrew

🇹🇭Thai

🇻🇳Vietnamese

🇮🇩Indonesian

🇲🇾Malay

🇵🇭Filipino

🇨🇿Czech

🇭🇺Hungarian

🇷🇴Romanian

🇧🇬Bulgarian

🇯🇵Japanese

🇰🇷Korean

🇨🇳Mandarin

🇹🇼Mandarin · TW

🇮🇳Hindi

🇮🇳Tamil

🇮🇳Bengali

🇦🇪Arabic · Gulf

🇸🇦Arabic · SA

🇪🇬Arabic · EG

🇹🇷Turkish

🇷🇺Russian

🇺🇦Ukrainian

🇬🇷Greek

🇮🇱Hebrew

🇹🇭Thai

🇻🇳Vietnamese

🇮🇩Indonesian

🇲🇾Malay

🇵🇭Filipino

🇨🇿Czech

🇭🇺Hungarian

🇷🇴Romanian

🇧🇬Bulgarian

MCP TOOLS

27 tools
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.

Agents

5 tools · hover for details

Spin 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.

GiveYourAIAgentaVoice

Your AI can do everything. Except pick up the phone

From prompt to phone call
in 60 seconds

One MCP server · Every AI agent

Callsy MCP

Every call. Every insight.
Every outcome

Built for every voice workflow

50+ voices · 40+ languages
Speak your customer's language

James

Salma

Sofía

Roberta

Chloé

Alicja

Lars

Francesca

Priya

27 tools
Full voice automation, exposed

Agents

Frequently asked questions

GiveYourAIAgentaVoice

Your AI can do everything. Except pick up the phone

From prompt to phone callin 60 seconds

One MCP server · Every AI agent

Callsy MCP

Every call. Every insight.Every outcome

Built for every voice workflow

50+ voices · 40+ languagesSpeak your customer's language

James

Salma

Sofía

Roberta

Chloé

Alicja

Lars

Francesca

Priya

Trusted by teams who close deals

27 toolsFull voice automation, exposed

Agents

Frequently asked questions

From prompt to phone call
in 60 seconds

Every call. Every insight.
Every outcome

50+ voices · 40+ languages
Speak your customer's language

27 tools
Full voice automation, exposed