MCP Server for WhatsApp Checker

Use the Model Context Protocol to call WhatsApp number check and credit query from Claude Desktop, Cursor, and other MCP clients.

Overview

This service exposes an MCP Server so AI assistants can verify if a phone number is on WhatsApp and check your API credits. Connect via the endpoint below with your API key.

Endpoint & Authentication

URL

https://wa-check-api.whatsabot.com/api/mcp/sse

Authentication

Query parameter ?apiKey=YOUR_API_KEY or HTTP header X-API-Key: YOUR_API_KEY.

Protocol

MCP Streamable HTTP. The same URL supports both GET and POST.

Available Tools

Tool	Description	Parameters	Billing
check_whatsapp_number	Check if a phone number has a WhatsApp account	`phone` (string)	1 credit per call
get_available_credits	Get current available credits for your API key	None	Free

Client Configuration

Claude Desktop

Edit ~/Library/Application Support/Claude/claude_desktop_config.json (macOS):

{
  "mcpServers": {
    "wa-check-api": {
      "url": "https://wa-check-api.whatsabot.com/api/mcp/sse?apiKey=YOUR_API_KEY"
    }
  }
}

Cursor

You must use the full MCP URL including the API key, e.g. https://wa-check-api.whatsabot.com/api/mcp/sse?apiKey=YOUR_API_KEY. Do not enter only the domain; otherwise Cursor may request OAuth paths like /register. This service returns 401 and OAuth-style JSON for those paths so the client falls back to API key connection.

Testing

GET or POST without an API key should return 401 with a JSON error body.
POST with a valid apiKey and an MCP initialize request should establish a session and return InitializeResult; subsequent requests must include the Mcp-Session-Id header.
Configure the URL and API key in Claude Desktop or Cursor to test tool calls from the client.

WA Number Checker

The Most Trusted WhatsApp Number Checker Online - Fast, Accurate, and Secure

Products

Links

Need Help?

Send us an email at help@whatsabot.com if you have any questions. We'll help you out.