WhatsApp Number Check

Determine whether a given phone number is registered on WhatsApp. Use this skill when the user asks if a number has WhatsApp or is using WhatsApp.

How to call

1. If wa-check-api MCP is configured: Prefer using call_mcp_tool to call check_whatsapp_number with the phone parameter (E.164 format recommended, e.g. +34605797764 or +8613800138000).
2. If MCP is not configured or you need to call from code/scripts: Use the REST API; see references/api.md. Include the x-api-key header and request GET /api/wa/check?phone=.... Base URL is https://wa-check-api.whatsabot.com.

Parameters and format

• phone: Required. E.164 or digits only (e.g. 34605797764). If the user only provides a local number, ask for the country code or have them supply it.

Results and errors

• Success: Answer based on result.exist in the response—"This number is registered on WhatsApp" or "This number is not registered on WhatsApp."
• API returns non-zero code: Briefly explain using the error code (missing API key, invalid number, insufficient credits, rate limit, etc.) and suggest the user check their API key or credits. Error code details are in references/api.md.