Where to find your Channel ID, WABA ID and phone number ID

PayPerWA gives every connected number its own Channel ID. API requests pass this ID as the X-Channel-Id header (or channelId in the body) so PayPerWA knows which number to send from. It is different from Meta's phone number ID and WABA ID, which you only need inside Meta's tools.

Copy it from the dashboard

• Settings → WhatsApp: every channel card shows the Channel ID, WABA ID and phone number ID with a copy button.
• Settings → API: the "Your channel IDs" list shows all channels next to your API keys.

Or ask the API

curl https://payperwa.com/api/v1/channels \
  -H "Authorization: Bearer YOUR_API_KEY"

The response lists each channel with id, phone_number, display_name, waba_id and phone_number_id. The channel ID is optional: without it, a template send uses the number the template belongs to and a free-form send uses the number with the open 24-hour window.

Full reference: API documentation.