How do I install Quackr?

Quackr supports both local and remote installation. For local use, install it via npm (npx) and add the configuration to your AI app. For remote access, add the server URL to your MCP configuration.

Is Quackr safe to use?

Yes. Quackr passed MCP Marketplace's automated security scan with a score of 10/10 (low risk). Every server on MCP Marketplace is security-scanned before it's listed; see the full security report on this page for the findings and permissions.

What credentials does Quackr need?

Quackr requires the following credentials or environment variables: QUACKR_API_KEY. You can find setup instructions on the server detail page.

What AI apps work with Quackr?

Quackr uses the Model Context Protocol (MCP) and works with any MCP-compatible AI app, including Claude, ChatGPT / Codex, Gemini, Copilot, Cursor, and more.

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Quackr MCP Server

by Quackr Mcp

Developer ToolsLow Risk10.0MCP RegistryLocalRemote

Free

Server data from the Official MCP Registry

Virtual phone numbers for SMS verification, OTP receipt, and number management.

About

Virtual phone numbers for SMS verification, OTP receipt, and number management.

Remote endpoints: streamable-http: https://mcp.quackr.io/

Security Report

10.0

Low Risk10.0Low Risk

Valid MCP server (1 strong, 1 medium validity signals). No known CVEs in dependencies. Package registry verified. Imported from the Official MCP Registry.

Endpoint verified · Requires authentication · 2 issues found

Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.

Permissions Required

This plugin requests these system permissions. Most are normal for its category.

env_vars

Check that this permission is expected for this type of plugin.

Shell Command Execution

Runs commands on your machine. Be cautious — only use if you trust this plugin.

HTTP Network Access

Connects to external APIs or services over the internet.

What You'll Need

Set these up before or after installing:

Your Quackr API key, from your profile page at quackr.ioRequired

Environment variable: QUACKR_API_KEY

How to Install & Connect

Available as Local & Remote

This plugin can run on your machine or connect to a hosted endpoint. during install.

Documentation

View on GitHub

From the project's GitHub README.

Quackr MCP Server

Official MCP server for Quackr — virtual phone numbers for SMS verification and OTP receipt. Use Claude (or any MCP-compatible client) to check pricing and inventory, purchase temporary numbers, and read incoming SMS programmatically.

npm: quackr-mcp — npx -y quackr-mcp
Hosted endpoint: https://mcp.quackr.io/
Transport: Streamable HTTP
Auth: Authorization: Bearer YOUR_API_KEY header

Tools

Tool	Description
`get-balance`	Get the current account balance in USD
`get-pricing`	Get phone number rental pricing for a specific country
`get-inventory`	Check available phone number inventory for a country
`purchase-number`	Purchase a temporary number for receiving SMS (deducts from balance)
`check-sms`	Check SMS messages received on a rented number
`list-active-numbers`	List all currently active (rented) numbers on the account

Getting an API Key

Sign in at quackr.io
Open your profile page
Copy the API key from the API section

Install via npm

The quackr-mcp package is a thin stdio launcher that bridges any stdio MCP client to the hosted Quackr endpoint. It needs Node.js 18+ — no separate install required, npx fetches it on first run.

{
  "mcpServers": {
    "quackr": {
      "command": "npx",
      "args": ["-y", "quackr-mcp"],
      "env": {
        "QUACKR_API_KEY": "YOUR_API_KEY_HERE"
      }
    }
  }
}

You can also pass the key as a flag instead of an env var: npx -y quackr-mcp --api-key YOUR_API_KEY_HERE.

Claude Code Setup

Remote (recommended) — connect directly to the hosted endpoint. Add to your ~/.claude.json (or a project .mcp.json):

{
  "mcpServers": {
    "quackr": {
      "type": "http",
      "url": "https://mcp.quackr.io/",
      "headers": {
        "Authorization": "Bearer YOUR_API_KEY_HERE"
      }
    }
  }
}

Or via the CLI:

claude mcp add --transport http quackr https://mcp.quackr.io/ --header "Authorization: Bearer YOUR_API_KEY_HERE"

Claude Desktop Setup

Claude Desktop's JSON config only supports local (stdio) servers. Use the npm launcher (see Install via npm) by adding the npx quackr-mcp config above to claude_desktop_config.json, then restart Claude Desktop.

Alternatively, add Quackr as a remote connector: Settings → Connectors → Add custom connector, enter https://mcp.quackr.io/, and add an Authorization header with the value Bearer YOUR_API_KEY.

Other MCP Clients

Any client supporting remote Streamable HTTP MCP servers with custom headers works. Point it at https://mcp.quackr.io/ and pass your key via the Authorization: Bearer YOUR_API_KEY header.

REST API

Quackr also exposes a full REST API at https://api.quackr.io/ — see api.quackr.io/swagger.json for the full spec. Same x-api-key auth.

Support

Website: quackr.io
Issues: file in this repo
Email: support@quackr.io

License

MIT — see LICENSE.

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Quackr MCP Server

About

Security Report

Findings (2)

Permissions Required

What You'll Need

How to Install & Connect

Documentation

Quackr MCP Server

Tools

Getting an API Key

Install via npm

Claude Code Setup

Claude Desktop Setup

Other MCP Clients

REST API

Support

License

Reviews

No reviews yet

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Git

Fetch

Toleno

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