Do you need this?
Most shops do not. Sapt can give your shop a local number in a few minutes and run it for you: open Project Settings, then Phone, and click Get your number. See Get your number. A number Sapt runs shows as Sapt managed, with nothing to set up. This page is for a shop whose number already lives in its own Telnyx account.What you get
- Texts and calls on your own Telnyx number, in your Inbox.
- Missed-call text back and your AI front desk on that number.
- The texting registration your number already has in Telnyx, read straight from your account.
Before you start
- Your login for the Telnyx portal, with your number on the account.
- Permission to manage integrations in Sapt. If you do not have it, Sapt says to ask a project admin.
Get your keys from Telnyx
1
Create an API key
In the Telnyx portal, click your account icon at the top right, then Account Settings, then API Keys. Click Create API Key and copy it. Telnyx shows it only once. Telnyx’s guide.
2
Copy your public key
In Account Settings, open Keys & Credentials, then the Public Key tab, and copy the key. Sapt uses it to check that messages really come from Telnyx. Telnyx’s guide.
Connect Telnyx in Sapt
1
Open your phone settings
In Sapt on the web, open Project Settings, then Phone. Under Connect your Telnyx account, click Connect Telnyx. Choosing Telnyx in Connected apps opens the same place.

2
Paste your keys
Paste the API key into API Key and the public key into Webhook Public Key. You can leave Default sending number empty. Click Connect.
Sapt then shows a webhook URL. You do not need to paste it anywhere: Sapt points your messaging profile at it for you. Click Done.

3
Pick your number
If your Telnyx account has more than one number, find the one this shop texts from under Your numbers and click Text from this one. With one number, skip this step.
4
Set up calls and texts
Click Set up or repair calls and texts. Sapt checks four things and marks each one: Project number, Sending number, Incoming text routing and Calling connection. Then call your number once and answer, and once more and let it ring out, to test both.
What Sapt sets up for you
- The messaging profile in your Telnyx account that sends texts to Sapt.
- Your chosen number as the number Sapt texts from.
- The connection that sends calls on your number to Sapt, so Sapt can text back the calls you miss.
- If your number already has a texting registration in Telnyx, Sapt finds it and shows its status.
Texting registration
US carriers want to know who is behind a number before they deliver its texts. This is called 10DLC registration. Telnyx explains it. Look under Texting registration on the Phone page:- Already registered in Telnyx: Sapt shows what the carriers said. There is nothing to do.
- Not registered yet: click Register my business and fill in your details. A person at Sapt checks them and sends them to the carriers, usually within a day. Carriers usually approve within a few days.