twilio-setup

name	twilio-setup
description	Configure Twilio credentials and phone numbers for voice calls
compatibility	Designed for Vellum personal assistants
metadata	{"icon":"assets/icon.svg","emoji":"📱","vellum":{"category":"integrations","display-name":"Twilio Setup","includes":["public-ingress"]}}

You are helping your user configure Twilio for voice calls. Walk through each step below.

Value Classification

Before you begin, understand how each Twilio value is stored:

Value	Type	Storage method	Secret?
Account SID	Config	assistant config set twilio.accountSid	No
Auth Token	Credential	assistant credentials prompt --service twilio --field auth_token	Yes
Phone Number	Config	assistant config set twilio.phoneNumber	No

• Config values (Account SID, Phone Number) are non-sensitive identifiers. Collect them via normal conversation -- the user can paste them in chat or you can use AskUserQuestion. Auth Token is a secret. Collect it securely via assistant credentials prompt -- never accept it pasted in plaintext chat.

Retrieving Twilio Credentials

Many steps below require the Account SID and Auth Token. Retrieve them with:

TWILIO_SID=$(assistant config get twilio.accountSid)
TWILIO_TOKEN=$(assistant credentials reveal --service twilio --field auth_token)

Checking Current Configuration

You can determine whether Twilio has been fully set up by checking to see that all the following config and credential values have been set:

assistant config get twilio.accountSid
assistant credentials inspect --service twilio --field auth_token --json  # check "hasSecret" field
assistant config get twilio.phoneNumber

• If all three config values are non-empty -- Twilio is fully configured. Offer to show status or reconfigure.
• Otherwise, continue to the missing steps.

Twilio Setup Steps

Follow the steps below in order to fully configure Twilio in preparation to make phone calls.

Step 1: Check Current Configuration

Mark setup as started before doing any read-only checks. This lets a managed gateway begin opening the Velay tunnel WebSocket immediately, so the public Twilio HTTP and WebSocket routes are warming up while the user finishes entering credentials and selecting a phone number:

assistant config set twilio.setupStarted true
assistant platform status --json
assistant gateway status --json

If assistant platform status --json reports an available platform assistant but assistant gateway status --json returns {} (no tunnel URL yet), continue with setup and check status again before configuring webhooks. Do not treat this as an ngrok setup problem unless the assistant is local/self-hosted without Velay.

Refer to "Checking Current Configuration" above to see the current state of the user's Twilio setup. If Twilio appears to be fully configured. Offer to show status or reconfigure. Otherwise, continue to the missing steps below.

Step 2: Collect and Store Credentials

Tell the user: "You'll need a Twilio account. Sign up at https://www.twilio.com/try-twilio -- it's free to start and includes trial credit."

They need two values from the Twilio Console dashboard (https://console.twilio.com):

• Account SID -- visible on the dashboard, starts with AC (this is not a secret value and can be collected conversationally)
• Auth Token -- click "Show" to reveal (this is a secret value and should be collected securely)

Collect Account SID

Ask the user for their Account SID. This is NOT a secret value, so the user should be encouraged to comfortable paste it into the chat directly. Once they have, store it as a config value:

assistant config set twilio.accountSid "<Account SID from user>"

Collect Auth Token

Ask the user for their Auth Token. This IS a secret value, so the user should be prompted to enter the value securely. Do NOT ask them to provide it in the chat. Once they have, store it as a credential:

• Run (via the bash tool):

  assistant credentials prompt --service twilio --field auth_token \
    --label "Twilio Auth Token" --placeholder "your_auth_token" \
    --description "Enter your Auth Token from the Twilio Console dashboard (click 'Show' to reveal it)"
  

Confirm it has been stored successfully:

assistant credentials inspect --service twilio --field auth_token

If credentials are invalid, Twilio API calls in Step 3 will fail -- ask the user to re-enter.

Step 3: Get a Phone Number

The assistant needs a phone number for voice calls. Three options:

Option A: Use an Existing Number

You should assume this option if the user had just created their Twilio account. Trial accounts come with one free number.

Retrieve credentials, then list numbers on the account:

curl -s -u "$TWILIO_SID:$TWILIO_TOKEN" \
  "https://api.twilio.com/2010-04-01/Accounts/$TWILIO_SID/IncomingPhoneNumbers.json"

Present the incoming_phone_numbers array. Let the user choose.

Option B: Provision a New Number

Retrieve credentials (see "Retrieving Twilio Credentials" above), then:

Search for available numbers:

curl -s -u "$TWILIO_SID:$TWILIO_TOKEN" \
  "https://api.twilio.com/2010-04-01/Accounts/$TWILIO_SID/AvailablePhoneNumbers/US/Local.json?VoiceEnabled=true&AreaCode=415"

• AreaCode is optional -- ask the user if they have a preference
• Replace US with another country code if needed

Present the first few results from the available_phone_numbers array (show phone_number and friendly_name).

Purchase the chosen number:

curl -s -u "$TWILIO_SID:$TWILIO_TOKEN" -X POST \
  "https://api.twilio.com/2010-04-01/Accounts/$TWILIO_SID/IncomingPhoneNumbers.json" \
  -d "PhoneNumber=[phone]"

Note the sid field (starts with PN) from the response -- needed for webhook setup in Step 4.

Option C: Manual Entry

If the user already has a number and knows it, skip the API calls. They can paste it directly in chat.

Save the phone number

After choosing a number via any option, store it as a config value:

assistant config set twilio.phoneNumber "[phone]"

Step 4: Set Up Public Ingress and Webhooks

Verify Public Ingress is Set Up

Twilio needs publicly reachable HTTP webhooks and, for live calls, a publicly reachable WebSocket path. First check managed/platform status:

assistant platform status --json
assistant gateway status --json

If assistant platform status --json reports an available platform assistant and assistant gateway status --json reports a tunnel URL (a { "tunnel": "..." } object), do not load public-ingress or install ngrok. Use the managed Velay route for the WebSocket leg. If it returns {}, restart or re-hatch the assistant/gateway and check gateway logs for Velay tunnel registered; do not treat that as an ngrok setup problem.

For local/self-hosted assistants without Velay, load the public-ingress skill to determine whether ingress.publicBaseUrl is configured and walk the user through setting one up if not.

Configure Twilio Webhooks

Set webhook URLs on the phone number so Twilio routes traffic to the assistant.

Retrieve credentials and config values:

TWILIO_SID=$(assistant config get twilio.accountSid)
TWILIO_TOKEN=$(assistant credentials reveal --service twilio --field auth_token)
PUBLIC_URL=$(assistant config get ingress.publicBaseUrl)
PHONE_NUMBER=$(assistant config get twilio.phoneNumber)

Look up the phone number's SID:

curl -s -u "$TWILIO_SID:$TWILIO_TOKEN" \
  "https://api.twilio.com/2010-04-01/Accounts/$TWILIO_SID/IncomingPhoneNumbers.json?PhoneNumber=$PHONE_NUMBER"

Note the sid field (starts with PN) from the matching entry, then update webhooks:

curl -s -u "$TWILIO_SID:$TWILIO_TOKEN" -X POST \
  "https://api.twilio.com/2010-04-01/Accounts/$TWILIO_SID/IncomingPhoneNumbers/$PHONE_SID.json" \
  -d "VoiceUrl=$PUBLIC_URL/webhooks/twilio/voice" \
  -d "StatusCallback=$PUBLIC_URL/webhooks/twilio/status"

Clearing Credentials

To disconnect Twilio:

assistant credentials delete --service twilio --field auth_token
assistant config set twilio.accountSid ""

Phone number assignments are preserved. Voice calls will stop until credentials are reconfigured.

Troubleshooting

"Twilio credentials not configured"

Run Steps 2 and 3.

"No phone number assigned"

Run Step 3.

Phone number provisioning fails

• Verify credentials are correct
• Trial accounts may already have a free number -- check "Active Numbers" in the Console
• Ensure the account has sufficient balance

Calls fail after setup

• Verify ingress is running: assistant config get ingress.publicBaseUrl
• For calls, ensure calls.enabled is true
• Trial accounts can only reach verified numbers

Incoming calls not reaching the assistant

Webhooks on the Twilio phone number may not match the current ingress URL. This happens when ngrok restarts with a new URL or webhooks were never configured.

Diagnose -- fetch the number's current webhooks and compare to the expected URL:

TWILIO_SID=$(assistant config get twilio.accountSid)
TWILIO_TOKEN=$(assistant credentials reveal --service twilio --field auth_token)
PUBLIC_URL=$(assistant config get ingress.publicBaseUrl)
PHONE_NUMBER=$(assistant config get twilio.phoneNumber)

curl -s -u "$TWILIO_SID:$TWILIO_TOKEN" \
  "https://api.twilio.com/2010-04-01/Accounts/$TWILIO_SID/IncomingPhoneNumbers.json?PhoneNumber=$PHONE_NUMBER"

Check that voice_url and status_callback start with the current ingress.publicBaseUrl. If they don't match, update them:

PHONE_SID=<PN sid from the response above>
curl -s -u "$TWILIO_SID:$TWILIO_TOKEN" -X POST \
  "https://api.twilio.com/2010-04-01/Accounts/$TWILIO_SID/IncomingPhoneNumbers/$PHONE_SID.json" \
  -d "VoiceUrl=$PUBLIC_URL/webhooks/twilio/voice" \
  -d "StatusCallback=$PUBLIC_URL/webhooks/twilio/status"