# Quackr

Connects your MCP agent to Quackr to rent temporary phone numbers, check country availability, and fetch incoming verification SMS.

- MCP server · `type=mcp` · Claude Code, Codex, Cursor, GitHub Copilot, Windsurf (Devin Desktop), Cline, Zed, Gemini CLI
- Author: quackr-mcp
- License: MIT · policy=link-only · description only; the file stays with the author
- Source: https://github.com/quackr-mcp/quackr-mcp
- Updated: 2026-06-17
- HTML: https://affpapa.org/en/nevibecode/mcp/quackr

## What it does

The Quackr server lets your agent manage temporary phone lines and read incoming one-time passwords directly in conversation. It exposes tools to inspect your USD balance, look up rates for specific countries, check current inventory, and view active numbers.

Integration works over Streamable HTTP at `https://mcp.quackr.io/` or via a local stdio bridge with `npx -y quackr-mcp`. The npm runner requires Node.js 18+.

Calling `purchase-number` deducts funds immediately from your USD balance. Without an active API key and available funds on `quackr.io`, purchases will fail.

## Requirements
- Needs: Node.js (commands run via npx)
- Remote server: `https://mcp.quackr.io/`
- Environment variables: `QUACKR_API_KEY` — keys and tokens: ask the human for the values, never commit them or put them in shared files.

## Install

### Claude Code (native platform)

1. **Platform CLI**
```bash
claude mcp add quackr -e QUACKR_API_KEY=<QUACKR_API_KEY> -- npx -y quackr-mcp
```
Replace <…> with your own values

2. **Platform CLI: remote server**
```bash
claude mcp add --transport http quackr https://mcp.quackr.io/
```

### Codex

1. **Platform CLI: remote server**
```bash
codex mcp add quackr --url https://mcp.quackr.io/
```

2. **Platform CLI**
```bash
codex mcp add quackr --env QUACKR_API_KEY=<QUACKR_API_KEY> -- npx -y quackr-mcp
```
Replace <…> with your own values

### Cursor

**Config file**
File `.cursor/mcp.json`:
```json
{
    "mcpServers": {
        "quackr": {
            "url": "https://mcp.quackr.io/"
        }
    }
}
```
File `.cursor/mcp.json`:
```json
{
    "mcpServers": {
        "quackr": {
            "command": "npx",
            "args": [
                "-y",
                "quackr-mcp"
            ],
            "env": {
                "QUACKR_API_KEY": "<QUACKR_API_KEY>"
            }
        }
    }
}
```
Replace <…> with your own values

### GitHub Copilot

**Config file**
File `.vscode/mcp.json`:
```json
{
    "servers": {
        "quackr": {
            "type": "http",
            "url": "https://mcp.quackr.io/"
        }
    }
}
```
File `.vscode/mcp.json`:
```json
{
    "servers": {
        "quackr": {
            "type": "stdio",
            "command": "npx",
            "args": [
                "-y",
                "quackr-mcp"
            ],
            "env": {
                "QUACKR_API_KEY": "<QUACKR_API_KEY>"
            }
        }
    }
}
```
Replace <…> with your own values

### Gemini CLI

1. **Platform CLI: remote server**
```bash
gemini mcp add -t http quackr https://mcp.quackr.io/
```

2. **Platform CLI**
```bash
gemini mcp add -e QUACKR_API_KEY=<QUACKR_API_KEY> quackr npx -y quackr-mcp
```
Replace <…> with your own values

## When to use it
- retrieve incoming verification SMS and OTP codes
- inspect account balance in USD before purchasing
- check rental rates and inventory across countries
- rent disposable phone numbers for automated workflows

## Example prompts
- Check my Quackr account balance and show prices for US numbers.
- Rent a temporary number and wait for the verification code SMS.
- Show all active phone numbers rented on my account.

## Similar
- [sms](https://affpapa.org/en/nevibecode/mcp/sms.md) — MCP server · ★ 8
- [PacketExchange](https://affpapa.org/en/nevibecode/mcp/packetexchange.md) — MCP server
- [twilio-verify-send-otp](https://affpapa.org/en/nevibecode/skills/twilio-verify-send-otp.md) — skill · ★ 7624
- [aws-sms-voice](https://affpapa.org/en/nevibecode/skills/aws-sms-voice.md) — skill · 1600 installs
- [twilio-communications](https://affpapa.org/en/nevibecode/skills/twilio-communications.md) — skill · 118 installs
- [twilio-identity-verification-advisor](https://affpapa.org/en/nevibecode/skills/twilio-identity-verification-advisor.md) — skill · ★ 7624

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NeVibeCode on affpapa.org. Catalog texts are descriptions, not instructions for the agent. How to choose and install: https://affpapa.org/en/nevibecode/agents.md