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Nixflex works the same whether you write code or not. Developers use our API; everyone else uses the dashboard. This guide is the no-code path: create an account, connect your phone number, and your AI agent starts answering calls.

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What you’ll need

  • A free Nixflex account
  • A phone number in your own Twilio account - the number your customers call
  • About five minutes
Nixflex uses a bring your own carrier model. Your number lives in your own carrier account, so you stay in full control and the carrier bills your call charges directly. Nixflex never takes over or resells your number.We support Twilio and Telnyx. This guide uses Twilio because it is the quicker of the two to set up by hand. If you already use Telnyx, everything works the same once the number is connected - see the Telnyx guide for its one extra setup step.

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Step 1 - Create your account

Open dashboard.nixflex.com and sign up. New accounts include $10 of free credit, so you can test everything before paying anything.

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Step 2 - Create your agent

An agent is your AI receptionist - the voice that answers the phone. You give it a personality and instructions in plain English, and it follows them on every call.
1

Open the Agents page

In the dashboard, go to Agents and create a new agent.
2

Write what it should say and do

Describe your business and how the agent should behave, for example:
You are the receptionist for Bella’s Hair Studio. Greet callers warmly, answer questions about opening hours (Tue to Sat, 9am to 6pm), and take bookings by collecting the caller’s name and preferred day. If you don’t know something, offer to take a message.
Set a welcome message too - the first thing callers hear, e.g. “Hello, Bella’s Hair Studio, how can I help?”
3

Pick a voice and language (optional)

Every agent uses the Ashley voice and auto-detect language by default, understanding and replying in English, French, Spanish, German and six more without any setup. Arabic, Hebrew, Korean, Chinese and Polish are supported too - pick the language directly instead of auto-detect. Change either at any time.
Keep instructions short and clear: what to do, the facts about your business to use, and what to do when unsure. You can edit the prompt any time - changes apply to the next call.

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Step 3 - Connect your phone number

This is the important part. You connect a number you already own, and Nixflex wires it up automatically.
Buy and set up the number in your carrier account first. Nixflex can only connect a number that already exists and is switched on for voice calls. If your carrier account is new, check the number is active and that calls to the countries you expect are allowed - carriers block some destinations by default until you enable them.Carrier websites also change. Twilio and Telnyx both redesign their consoles and update their rules from time to time, so a screen or a field name may not look exactly like it does here. If something has moved, follow your carrier’s own current help pages - what Nixflex needs from you stays the same.
1

Get your Twilio details

Sign in to the Twilio Console. On the main dashboard you’ll find your Account SID and Auth Token - copy both. You’ll also need the phone number in full international format, e.g. +447446466847.
2

Import the number in Nixflex

In the dashboard, go to Phone Numbers and import a number. Leave the provider set to Twilio, paste your Account SID, Auth Token, and the phone number, then choose the agent that should answer it.
3

Done - Nixflex configures the rest

Nixflex points your number at the engine automatically. You don’t need to change any settings inside Twilio.
Using Telnyx instead? Switch the provider toggle to Telnyx on the same screen. Telnyx needs one extra thing set up in its portal first - a TeXML Application that tells Telnyx where to send your calls. It is a one-off job, and the Telnyx guide walks through it. After that, importing is the same.
Each number is answered by one agent. To switch a number to a different agent later, remove it and import it again with the new agent selected.

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Step 4 - Receive your first call

Call your number from any phone. Your agent picks up, plays your welcome message, listens, answers naturally, handles interruptions, and hangs up when the conversation is done. That’s it - you now have a working AI agent answering your calls.

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Everything else works for you too

The rest of these docs use developer examples (API requests), but every feature is the same for you - you just turn it on in the dashboard instead of calling an API. Don’t skip a section because it shows code; the capability is yours either way. A few you’ll likely want:

Voicemail detection

The agent spots an answering machine, leaves a short message, and ends the call.

Call transfers

Hand a caller to a real person when they need one.

SMS

Send a text during or after a call - confirmations, links, summaries.

Post-call summaries

Every call comes with a written summary, caller sentiment, and key details pulled out automatically.

Languages

15 languages. One agent follows the caller across ten of them automatically; the rest are set per agent.

Outbound calls

Have your agent call customers - reminders, follow-ups, confirmations.
The only real difference between the business and developer paths is how you set things up: developers send API requests, you use the dashboard. The AI, voices, languages, and every feature are exactly the same underneath.