Quackr MCP

What is Quackr MCP?

Quackr MCP is an official MCP server for Quackr — virtual phone numbers for SMS verification and OTP receipt. It lets MCP-compatible clients like Claude check pricing and inventory, purchase temporary numbers, and read incoming SMS programmatically.

How to use Quackr MCP?

Configure it in your MCP client with the hosted endpoint https://mcp.quackr.io/ and an Authorization: Bearer YOUR_API_KEY header. Use the CLI command claude mcp add --transport http quackr https://mcp.quackr.io/ --header "Authorization: Bearer YOUR_API_KEY_HERE" or add it to your ~/.claude.json. For Claude Desktop, add it as a custom connector in Settings → Connectors with the same header.

Key features of Quackr MCP

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

Use cases of Quackr MCP

• Check account balance before renting a number
• Look up pricing and inventory for a specific country
• Purchase a temporary phone number for SMS verification
• Read OTPs and incoming SMS from a rented number
• Manage multiple active numbers programmatically

FAQ from Quackr MCP

How do I get an API key?

Sign in at quackr.io, open your profile page, and copy the API key from the API section.

What transport and authentication does Quackr MCP use?

It uses Streamable HTTP transport with Bearer token authentication via the Authorization: Bearer YOUR_API_KEY header.

Can I use Quackr MCP with Claude Desktop?

Yes, add it as a remote custom connector in Settings → Connectors with the URL https://mcp.quackr.io/ and the Authorization header.

Does Quackr also offer a REST API?

Yes, a full REST API is available at https://api.quackr.io/ with the same authentication. See api.quackr.io/swagger.json for the spec.

Where is the Quackr MCP server hosted?

The official hosted endpoint is https://mcp.quackr.io/. It does not run locally.