SignSlip

📱 Connect WhatsApp to SignSlip

Receive and reply to WhatsApp messages directly in your team's unified inbox

1 Create a Twilio Account

WhatsApp integrates through Twilio (same account as SMS can be used).

  1. Go to twilio.com/try-twilio
  2. Sign up with your email and phone
  3. Complete verification

2 Get Twilio Credentials

  1. Log in to console.twilio.com
  2. Copy your Account SID and Auth Token

3 Set Up WhatsApp in Twilio

  1. In Twilio console: MessagingWhatsApp
  2. Click Get Started
  3. Accept Terms & Conditions
  4. Get your Twilio WhatsApp number (or connect your business number)
✓ WhatsApp sandbox is free for testing; production requires business verification

4 Add WhatsApp Channel in SignSlip

  1. Log in to SignSlip dashboard
  2. Select your team
  3. Click Add WhatsApp Channel
  4. Fill in:
    • Channel Name: e.g., "Customer Support"
    • Phone Number: Your Twilio WhatsApp number
    • Account SID: From step 2
    • Auth Token: From step 2
  5. Click Create Channel

5 Configure Twilio Webhook

  1. In Twilio: MessagingWhatsApp Sandbox
  2. Go to Sandbox Settings
  3. Find "When a message comes in"
  4. Set webhook URL to:
    https://yoursite.com/api/webhooks/twilio/whatsapp
  5. Save

6 Test It

  1. Send test message from WhatsApp to your Twilio number
  2. Message appears in SignSlip inbox
  3. Team members can reply

❓ FAQ

Cost? WhatsApp messages ~$0.02-0.05 each via Twilio (more expensive than SMS)

Sandbox vs Production? Sandbox is free for testing; production requires WhatsApp Business verification with Meta

Multiple teams? Each team can have its own WhatsApp channel with separate numbers