Twilio Communications

Use this skill for all Twilio tasks including SMS, WhatsApp, voice calls, and verification.

Requirements

• Hyper MCP installed and connected. https://app.hyperfx.ai/mcp
• Twilio integration enabled at https://app.hyperfx.ai/apps.

WhatsApp Sandbox Setup (Required for Testing)

Before sending WhatsApp messages in sandbox/testing mode, users must join the sandbox:

1. User goes to: https://console.twilio.com/us1/develop/sms/try-it-out/whatsapp-learn
2. They find their unique join code (e.g., "join happy-turtle")
3. They send that message from WhatsApp to +14155238886
4. Once confirmed, use twilio_whatsapp_send with from_number set to "+14155238886"

If WhatsApp message fails with "not a valid WhatsApp-enabled number" or similar:

• The user likely hasn't joined the sandbox yet
• Guide them through the steps above

Tool Quick Reference

Messaging

• twilio_sms_send - Send SMS/MMS messages
• twilio_whatsapp_send - Send WhatsApp messages (sandbox: use +14155238886 as from_number)
• twilio_messages_list - List message history
• twilio_messages_delivery_status_check - Check if message was delivered

Voice Calls

• twilio_calls_create - Initiate outbound call (requires TwiML URL or inline TwiML)
• twilio_calls_list - List call history
• twilio_recordings_list - List call recordings

Phone Numbers

• twilio_phone_numbers_list - List numbers in account (use to find valid from_number)
• twilio_phone_numbers_lookup - Validate phone number and get carrier info

Verification (OTP)

• twilio_verification_services_create - Create verification service first
• twilio_verifications_send - Send OTP code
• twilio_verifications_check - Verify user's code

Common Patterns

Before sending SMS/WhatsApp: Call twilio_phone_numbers_list first to find a valid sender number.

WhatsApp sandbox flow:

1. Confirm user has joined sandbox (provide instructions if not)
2. Call twilio_whatsapp_send with:

{
  "to": "+1XXXXXXXXXX",
  "body": "Hello from the assistant",
  "from_number": "+14155238886"
}

Phone verification flow:

Step 1 -- Call twilio_verification_services_create with:

{
  "friendly_name": "My App"
}

Step 2 -- Call twilio_verifications_send with:

{
  "service_sid": "<service_sid_from_step_1>",
  "to": "+1XXXXXXXXXX",
  "channel": "sms"
}

Step 3 -- Call twilio_verifications_check with:

{
  "service_sid": "<service_sid>",
  "to": "+1XXXXXXXXXX",
  "code": "<user_provided_code>"
}

Safety Rules

• Never assume a valid sender number; always verify with twilio_phone_numbers_list.
• Do not continue silently after failures; report exact error and ask user how to proceed.
• For verification flows, keep service SIDs and code checks explicit and auditable.