MCP Server for AI Agent SMS

The AI agent phone number provider built on MCP. Provision virtual numbers for AI bots and receive SMS — all through the industry-standard Model Context Protocol.

SMS Verification MCP Integration for AI

The Model Context Protocol (MCP) is rapidly becoming the industry standard for how AI assistants and autonomous agents connect to external tools and services. Think of it as a universal plug that lets any AI system access real-world capabilities.

Quackr's MCP server for SMS verification exposes our entire infrastructure — number provisioning and message receiving — so your AI agents can verify accounts and receive SMS through real phone numbers, just like a human would.

No custom API integrations needed. If your LLM agent or AI assistant supports MCP, it can use Quackr out of the box.

mcp-config.json
{
  "mcpServers": {
    "quackr": {
      "url": "https://mcp.quackr.io/",
      "headers": {
        "Authorization": "Bearer qk_mcp_…your key…"
      }
    }
  }
}

The Privacy-First AI Agent Phone Number Provider

Generic telco APIs weren't designed for AI agents. Quackr is. As a purpose-built phone number provider for AI bots, our privacy-first infrastructure gives your agents features that matter for autonomous operations.

Disposable Agent Numbers

Provision numbers for a single task, then release them. No trace left behind.

Encrypted Message Storage

All messages are encrypted at rest. Auto-purge after configurable retention periods.

No PII Logging

We don't log message content or phone numbers beyond what's needed for delivery.

Agent Isolation

Each agent gets its own namespace. Numbers and messages are sandboxed per agent.

30+

Countries Supported

<3s

Number Provisioning

99.9%

Uptime SLA

E2E

Encryption

Why Every AI Agent Needs a Phone Number

As AI assistants and autonomous agents go mainstream, they all need a real phone identity to interact with the world. An AI agent phone number provider like Quackr makes this seamless.

SMS Verification

AI bots can sign up for services, verify accounts, and complete 2FA flows autonomously using a virtual number.

Account Creation

AI agents can autonomously create accounts on platforms that require phone verification, handling the entire signup flow.

Two-Factor Authentication

Receive 2FA codes and OTPs on behalf of your agent, enabling secure access to protected services.

Automated Testing

QA and testing agents can verify SMS-based workflows end-to-end using real phone numbers across multiple countries.

AI Agent SMS API via MCP Tools

Your LLM agents get access to these SMS API capabilities through MCP tool calls — no REST boilerplate required.

purchase-number

Buy a real number for your agent in 15+ countries. Pick the country, duration and (optionally) carrier; the number is active instantly and billed from your balance.

check-sms

Read the SMS received on a rented number. Verification codes land within seconds, ready for your agent to use.

list-active-numbers

See every number the account is currently renting, with expiry dates, so your agent reuses what it already has instead of buying again.

get-inventory

Check which countries and carriers have numbers in stock right now, plus get-pricing and get-balance, so your agent can plan before it spends.

Connect Quackr to your agent

One URL works everywhere: https://mcp.quackr.io/. Agents that support sign-in will ask you to approve access with your Quackr account; the rest take an API key from your dashboard.

Meta Muse

  1. In Muse, add a connector by URL.
  2. Paste https://mcp.quackr.io/.
  3. When Muse asks for credentials, sign in with Quackr and tap Allow. An API key works too.

Grok Bot

  1. Open grok.com/connectors → New Connector → Custom.
  2. URL: https://mcp.quackr.io/.
  3. Header: Authorization: Bearer YOUR_API_KEY. Grok's custom connectors use keys, not sign-in. Create one in Dashboard → MCP.

Claude

  1. Settings → Connectors → Add custom connector.
  2. URL: https://mcp.quackr.io/.
  3. Click Connect, sign in with Quackr, tap Allow.

ChatGPT

  1. Settings → Connectors → Create (custom MCP server).
  2. URL: https://mcp.quackr.io/, authentication: OAuth.
  3. Sign in with Quackr and tap Allow.

You can see and disconnect every connected agent under Dashboard → MCP. Buying a number always uses your Quackr balance; agents are told to confirm the price with you first.

How to Get a Phone Number for Your AI Agent

Three steps to give your AI assistant a real phone number identity.

1

Connect

Add https://mcp.quackr.io/ to your agent. Sign in with Quackr when it asks, or paste an API key from your dashboard.

2

Provision

Your agent calls purchase-number to get a real phone number from any supported country.

3

Receive

Receive SMS messages and verification codes through the provisioned number. Your agent now has a real phone identity.

SMS API for LLM Agents & AI Assistants

Quackr's MCP integration works with the growing ecosystem of AI frameworks and agents that support the Model Context Protocol.

AI Assistants

Give an AI assistant a phone number — Claude, GPT, Gemini, and other LLM agents with MCP support.

Agent Frameworks

LangChain, CrewAI, AutoGen, and other orchestration frameworks.

Custom Agents

Any custom-built agent or workflow that implements the MCP client protocol.

Ready to get a virtual number for your AI bot? Get early access to Quackr's MCP server for SMS verification. We're onboarding teams building the next generation of AI agents.

Request Early Access