Twilio → Vobiz: Code Snippets for Common Tasks

Refactoring a Twilio app to Vobiz is mostly a tab-swap: same call flow, a few renamed methods, and an explicit auth_id. Each task below shows the Twilio code and the equivalent Vobiz code in Python and Node - copy the Vobiz tab.

Set your credentials once: AUTH_ID is your Vobiz Auth ID (MA_…), AUTH_TOKEN is your Auth Token. In the Vobiz SDK, api_key is the Auth ID, and every account-scoped method takes that auth_id explicitly.

Set up the client

from twilio.rest import Client

client = Client(ACCOUNT_SID, AUTH_TOKEN)

from vobiz import Vobiz

client = Vobiz(api_key=AUTH_ID, auth_token=AUTH_TOKEN)

const twilio = require('twilio');

const client = twilio(ACCOUNT_SID, AUTH_TOKEN);

import { VobizClient } from '@vobiz/sdk';

const client = new VobizClient({ apiKey: AUTH_ID, authToken: AUTH_TOKEN });

Make an outbound call

The classic “change a few lines” migration: calls.create → calls.make_call, add auth_id, and url/method → answer_url/answer_method.

call = client.calls.create(
    to='+919876543210',
    from_='+14155551234',
    url='https://example.com/answer.xml',
    method='POST',
)
print(call.sid)

res = client.calls.make_call(
    auth_id=AUTH_ID,
    from_='+14155551234',
    to='+919876543210',
    answer_url='https://example.com/answer.xml',
    answer_method='POST',
)

const call = await client.calls.create({
  to: '+919876543210',
  from: '+14155551234',
  url: 'https://example.com/answer.xml',
  method: 'POST',
});
console.log(call.sid);

await client.calls.makeCall({
  auth_id: AUTH_ID,
  from: '+14155551234',
  to: '+919876543210',
  answer_url: 'https://example.com/answer.xml',
  answer_method: 'POST',
});

The XML builder maps verb-for-verb: VoiceResponse() → ResponseElement(), and Gather keeps its name. On the builder, response.gather(...) → resp.add_gather(...), nested .say() → .add_speak(), and str(response) → resp.to_string(). Twilio’s input/timeout become Vobiz’s input_type/execution_timeout; num_digits carries over unchanged.

from twilio.twiml.voice_response import VoiceResponse, Gather

resp = VoiceResponse()
menu = resp.gather(input='dtmf', num_digits=1, timeout=10,
                   action='https://example.com/menu', method='POST')
menu.say('Press 1 for sales, 2 for support.')
print(str(resp))

from vobiz import vobizxml

resp = vobizxml.ResponseElement()
menu = resp.add_gather(input_type='dtmf', num_digits=1, execution_timeout=10,
                       action='https://example.com/menu', method='POST')
menu.add_speak('Press 1 for sales, 2 for support.')
print(resp.to_string())

const { twiml } = require('twilio');

const resp = new twiml.VoiceResponse();
const menu = resp.gather({ input: 'dtmf', numDigits: 1, timeout: 10, action: 'https://example.com/menu', method: 'POST' });
menu.say('Press 1 for sales, 2 for support.');
console.log(resp.toString());

import { vobizxml } from '@vobiz/sdk';

const resp = new vobizxml.ResponseElement();
const menu = resp.addGather({ inputType: 'dtmf', numDigits: 1, executionTimeout: 10, action: 'https://example.com/menu', method: 'POST' });
menu.addSpeak('Press 1 for sales, 2 for support.');
console.log(resp.toString());

Vobiz emits the same document shape your TwiML app already returns - see the full verb table in TwiML → VobizXML, and validate the incoming request on your answer URL as shown in Webhooks.

Serve the answer URL (Flask / FastAPI / Express)

When Vobiz rings your number it fetches your answer_url over HTTP - return the VobizXML from any web framework, exactly as your Twilio voice URL returned TwiML. Just build the response with vobizxml instead of VoiceResponse, and send it as application/xml.

from flask import Flask, Response
from twilio.twiml.voice_response import VoiceResponse

app = Flask(__name__)

@app.route('/answer', methods=['POST'])
def answer():
    resp = VoiceResponse()
    resp.say('Hello from Twilio.')
    return Response(str(resp), mimetype='application/xml')

from flask import Flask, Response
from vobiz import vobizxml

app = Flask(__name__)

@app.route('/answer', methods=['POST'])
def answer():
    resp = vobizxml.ResponseElement()
    resp.add_speak('Hello from Vobiz.')
    return Response(resp.to_string(), mimetype='application/xml')

from fastapi import FastAPI, Response
from vobiz import vobizxml

app = FastAPI()

@app.post('/answer')
async def answer():
    resp = vobizxml.ResponseElement()
    resp.add_speak('Hello from Vobiz.')
    return Response(content=resp.to_string(), media_type='application/xml')

import express from 'express';
import { vobizxml } from '@vobiz/sdk';

const app = express();

app.post('/answer', (req, res) => {
  const resp = new vobizxml.ResponseElement();
  resp.addSpeak('Hello from Vobiz.');
  res.type('application/xml').send(resp.toString());
});

Building the XML is the only thing that changes - swap VoiceResponse()/str(resp) for vobizxml.ResponseElement()/resp.to_string() and keep the same route. The full verb map is in TwiML → VobizXML, and validating the signed request on this endpoint is covered in Webhooks.

Control a live call

This is the biggest shape change - and the one that makes Vobiz code clearer. Twilio funnels every mid-call action back through client.calls(sid).update(...) (redirecting to fresh TwiML or setting status) and starts recording with client.calls(sid).recordings.create(). Vobiz gives each action its own resource keyed by (auth_id, call_uuid), so the intent lives on the method name.

Action	Twilio	Vobiz
Play audio	`client.calls(sid).update(twiml="<Play>…")`	`client.play_audio.call(auth_id, call_uuid, urls=)`
Speak text	`client.calls(sid).update(twiml="<Say>…")`	`client.speak_text.call(auth_id, call_uuid, text=)`
Send DTMF	`client.calls(sid).update(twiml="<Play digits=…>")`	`client.dtmf.send_dtmf(auth_id, call_uuid, digits=)`
Start recording	`client.calls(sid).recordings.create()`	`client.record_calls.start_recording(auth_id, call_uuid)`
Hang up	`client.calls(sid).update(status="completed")`	`client.live_calls.hangup_call(auth_id, call_uuid)`

# Every mid-call change re-enters client.calls(sid).update(...)
client.calls(sid).update(                                            # play audio
    twiml='<Response><Play>https://example.com/hold.mp3</Play></Response>')
client.calls(sid).update(                                            # speak text
    twiml='<Response><Say>Please hold.</Say></Response>')
client.calls(sid).update(                                            # send DTMF
    twiml='<Response><Play digits="1234"></Play></Response>')
client.calls(sid).recordings.create()                                # start recording
client.calls(sid).update(status='completed')                         # hang up

client.play_audio.call(AUTH_ID, CALL_UUID, urls='https://example.com/hold.mp3')   # play audio
client.speak_text.call(AUTH_ID, CALL_UUID, text='Please hold.')                   # speak text
client.dtmf.send_dtmf(AUTH_ID, CALL_UUID, digits='1234')                          # send DTMF
client.record_calls.start_recording(AUTH_ID, CALL_UUID)                           # start recording
client.live_calls.hangup_call(AUTH_ID, CALL_UUID)                                 # hang up

await client.calls(sid).update({
  twiml: '<Response><Play>https://example.com/hold.mp3</Play></Response>' });
await client.calls(sid).update({
  twiml: '<Response><Say>Please hold.</Say></Response>' });
await client.calls(sid).update({
  twiml: '<Response><Play digits="1234"></Play></Response>' });
await client.calls(sid).recordings.create();
await client.calls(sid).update({ status: 'completed' });

await client.playAudio.call(AUTH_ID, CALL_UUID, { urls: 'https://example.com/hold.mp3' });
await client.speakText.call(AUTH_ID, CALL_UUID, { text: 'Please hold.' });
await client.dtmf.sendDtmf(AUTH_ID, CALL_UUID, { digits: '1234' });
await client.recordCalls.startRecording(AUTH_ID, CALL_UUID);
await client.liveCalls.hangupCall(AUTH_ID, CALL_UUID);

Each Vobiz method name states the action, so live-call logic reads top-to-bottom. For the full resource map, see Voice Call API; to convert the TwiML you inline via update(twiml=…), use the TwiML → VobizXML reference.

Look up a live call

Twilio reads live and completed calls off one client.calls resource, filtered by status. Vobiz gives in-flight calls their own live_calls resource - pass status="live" to fetch or list what’s currently on the wire. Completed-call history lives in cdr.

one = client.calls('CA0123...').fetch()
live = client.calls.list(status='in-progress')

one = client.live_calls.get_live_call(AUTH_ID, 'call-uuid-here', status='live')
live = client.live_calls.list_live_calls(AUTH_ID, status='live')

Search and buy a phone number

Twilio searches the live carrier catalog with available_phone_numbers('US').local.list(...), reads .phone_number off a result, then provisions it with incoming_phone_numbers.create(phone_number=...). Vobiz browses ready-to-buy stock with list_inventory_numbers(...) and buys by E.164 with purchase_from_inventory(...) - a deterministic two-step flow where the E.164 number is the key.

available = client.available_phone_numbers('US').local.list(limit=1)
number = available[0].phone_number   # e.g. '+14155551234'
incoming = client.incoming_phone_numbers.create(phone_number=number)

available = client.phone_numbers.list_inventory_numbers(AUTH_ID, country='US')
number = available.numbers[0].e164   # e.g. '+14155551234'
bought = client.phone_numbers.purchase_from_inventory(AUTH_ID, e164=number)

const available = await client.availablePhoneNumbers('US').local.list({ limit: 1 });
const number = available[0].phoneNumber;   // e.g. '+14155551234'
const incoming = await client.incomingPhoneNumbers.create({ phoneNumber: number });

const available = await client.phoneNumbers.listInventoryNumbers(AUTH_ID, { country: 'US' });
const number = available.numbers[0].e164;   // e.g. '+14155551234'
const bought = await client.phoneNumbers.purchaseFromInventory(AUTH_ID, { e164: number });

Manage a conference

Twilio tracks a room by its CF… SID and each leg by its CallSid. Vobiz uses the room name as the join key and a member_id per participant - get_conference returns the room details and its member list in one call, and every control is its own verb.

conf = client.conferences("CFxxxxxxxx")

# Who is in the room?
for p in conf.participants.list():
    print(p.call_sid, "muted:", p.muted)

# Mute, hold, and remove one participant
conf.participants("CAaaaa").update(muted=True)
conf.participants("CAaaaa").update(hold=True, hold_url="https://example.com/hold.mp3")
conf.participants("CAaaaa").delete()

# End the whole conference
conf.update(status="completed")

# Who is in the room? get_conference returns members + room details together
room = client.conferences.get_conference(AUTH_ID, conference_name="SalesRoom")
for m in room["members"]:
    print(m["member_id"], "muted:", m["muted"])

# Mute a member; hold = play audio to just that member, stop returns them to the room
client.conference_members.mute_member(AUTH_ID, conference_name="SalesRoom", member_id="MEMBER_1")
client.conference.play_audio_member(AUTH_ID, conference_name="SalesRoom",
                                    member_id="MEMBER_1", url="https://example.com/hold.mp3")
client.conference.stop_audio_member(AUTH_ID, conference_name="SalesRoom", member_id="MEMBER_1")
client.conference.kick_member(AUTH_ID, conference_name="SalesRoom", member_id="MEMBER_1")

# End one room, or every active room at once
client.conferences.delete_conference(AUTH_ID, conference_name="SalesRoom")
client.conferences.delete_all_conferences(AUTH_ID)

Record the whole room on demand by name - start and stop whenever you like:

# Twilio sets recording on the <Conference> verb:
#   <Conference record="record-from-start"
#               recordingStatusCallback="https://example.com/rec">SalesRoom</Conference>

client.conference_recording.start_conference_recording(
    AUTH_ID, conference_name="SalesRoom",
    file_format="mp3", callback_url="https://example.com/rec")
client.conference_recording.stop_conference_recording(AUTH_ID, conference_name="SalesRoom")

The full per-verb map - mute/unmute, deaf/undeaf, kick/hangup, and the <Conference> element - is in Conferences.

List call records

Completed-call history is a first-class cdr resource on Vobiz, with rich filters for reporting.

records = client.calls.list(status="completed", limit=20)
for r in records:
    print(r.sid, r.to, r.duration, r.price)

records = client.cdr.list_cdrs(
    AUTH_ID,
    start_date="2026-06-01",
    end_date="2026-06-30",
    call_direction="outbound",
)

Filter CDRs by from_number, to_number, call_direction, hangup_cause, bridge_uuid, or sip_call_id - purpose-built for reporting. See Voice Call API for the live-vs-history split (live_calls for in-flight legs, cdr for completed history).

Validate a webhook signature

Both platforms sign inbound webhooks so you can prove the request came from them. Twilio’s RequestValidator rebuilds the full URL plus every sorted POST field and HMAC-SHA1s it against X-Twilio-Signature. Vobiz signs a short, deterministic string - baseURL + "." + nonce (query stripped) - with HMAC-SHA256, and sends it as X-Vobiz-Signature-V3 with the random nonce in X-Vobiz-Signature-V3-Nonce. No param-sorting step, reproducible in any language with the standard library.

from flask import Flask, request, abort
from twilio.request_validator import RequestValidator

app = Flask(__name__)
AUTH_TOKEN = "your_twilio_auth_token"

@app.route("/voice", methods=["POST"])
def voice():
    validator = RequestValidator(AUTH_TOKEN)
    # HMAC-SHA1 over full URL + sorted POST params
    valid = validator.validate(
        request.url,
        request.form,
        request.headers.get("X-Twilio-Signature", ""),
    )
    if not valid:
        abort(403)
    # ... return TwiML

import hmac, hashlib, base64
from urllib.parse import urlparse, urlunparse
from flask import Flask, request, abort

app = Flask(__name__)
AUTH_TOKEN = "your_vobiz_auth_token"      # your Auth Token signs the webhook

def _base_url(url: str) -> str:
    p = urlparse(url)
    return urlunparse((p.scheme, p.netloc, p.path, "", "", ""))  # strip query

def validate_v3(url: str, headers, token: str) -> bool:
    nonce = headers.get("X-Vobiz-Signature-V3-Nonce", "")   # read case-insensitively
    msg = (_base_url(url) + "." + nonce).encode()            # HMAC-SHA256
    expected = base64.b64encode(
        hmac.new(token.encode(), msg, hashlib.sha256).digest()
    ).decode()
    # constant-time compare - never ==
    return hmac.compare_digest(headers.get("X-Vobiz-Signature-V3", ""), expected)

@app.route("/voice", methods=["POST"])
def voice():
    if not validate_v3(request.url, request.headers, AUTH_TOKEN):
        abort(403)
    # ... return VobizXML
    return "", 200

On sub-account callbacks Vobiz also adds X-Vobiz-Signature-MA-V3, signed with the parent (main-account) token, so a parent can verify child traffic with the same validator. Full mapping and the Node version: webhooks & signatures.

Handle errors

Catch the Vobiz error types (all subclasses of ApiError) the same way you caught Twilio’s TwilioRestException - with the HTTP status and response body available on the exception.

from twilio.base.exceptions import TwilioRestException

try:
    client.calls.create(
        to="+14165553434",
        from_="+14155551234",
        url="https://example.com/answer.xml",
        method="POST",
    )
except TwilioRestException as e:
    print(e.status, e.code, e.msg)

from vobiz.core.api_error import ApiError

try:
    client.calls.make_call(
        auth_id=AUTH_ID,
        from_="+14155551234",
        to="+14165553434",
        answer_url="https://example.com/answer.xml",
        answer_method="POST",
    )
except ApiError as e:
    print(e.status_code, e.body)

Full verb table: TwiML → VobizXML.

Need a method that isn’t here? The full per-resource map is in Voice Call API, TwiML → VobizXML, and the rest of the Twilio migration section.

AI Voice Platforms

Official SDKs

Browser & WebRTC

Business Phone Systems

Migrations

Twilio → Vobiz: Code Snippets for Common Tasks

Set up the client

Make an outbound call

Answer a call with XML (TTS + menu)

Serve the answer URL (Flask / FastAPI / Express)

Control a live call

Look up a live call

Search and buy a phone number

Manage a conference

List call records

Validate a webhook signature

Handle errors

​Set up the client

​Make an outbound call

​Answer a call with XML (TTS + menu)

​Serve the answer URL (Flask / FastAPI / Express)

​Control a live call

​Look up a live call

​Search and buy a phone number

​Manage a conference

​List call records

​Validate a webhook signature

​Handle errors

Set up the client

Make an outbound call

Answer a call with XML (TTS + menu)

Serve the answer URL (Flask / FastAPI / Express)

Control a live call

Look up a live call

Search and buy a phone number

Manage a conference

List call records

Validate a webhook signature

Handle errors