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The VoiceInfra Telnyx integration connects your existing Telnyx phone numbers to AI agents in minutes. Telnyx keeps handling the telephony and billing exactly as it does today — VoiceInfra adds the intelligence layer on top of every call. Your customers dial the same numbers, and your AI agents answer.
Your numbers remain in your Telnyx account throughout. Telnyx continues to handle telephony and billing. VoiceInfra does not move, port, or take ownership of your numbers.

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Prerequisites

Before connecting, retrieve your API v2 key from the Telnyx Portal:
  • Navigate to Auth → API Keys in your Telnyx Portal
  • Create or copy an existing API v2 key — it starts with KEY and is 64 or more characters long
Telnyx API v2 key: KEY0123456789abcdef...  (starts with KEY, 64+ chars)
Keep your API key private. VoiceInfra encrypts it at rest and uses it only to fetch your number list via the Telnyx v2 API.

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Import Your Telnyx Numbers

1

Open the Telnyx import screen

In the VoiceInfra dashboard, go to Settings → Phone Numbers → Connect Telnyx.
2

Enter your Telnyx API v2 key

Paste your API v2 key into the form. The key must start with KEY. VoiceInfra encrypts it immediately — it is never stored in plain text, exposed in logs, or used to access your Telnyx billing or account settings.
3

Browse your available numbers

After connecting, your Telnyx numbers appear in a list showing the country code, full number, and friendly name. Confirm your numbers are present before selecting.
4

Select and import

Check the numbers you want to bring into VoiceInfra — one, several, or all of them. Click Import. Selected numbers are instantly available in your VoiceInfra dashboard.
5

Assign to an AI agent

For each imported number, choose the AI agent that handles calls on that number. Assign different agents to different numbers, or configure separate agents for inbound and outbound calls.

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Syncing New Numbers

If you add new numbers to Telnyx after the initial import, return to Settings → Phone Numbers → Connect Telnyx and re-run the import. VoiceInfra fetches your current number list and makes any new numbers available.

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SIP Trunking Integration

For advanced deployments, VoiceInfra can also integrate directly with Telnyx SIP trunking. This gives you full control over custom call routing, inbound/outbound SIP URI configuration, and IP whitelisting alongside your standard Telnyx number management. See the SIP Numbers guide for SIP trunk configuration details.

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Frequently Asked Questions

No. You continue paying Telnyx directly for number rental and call usage. VoiceInfra charges separately for AI usage. There are no additional telephony fees from VoiceInfra.
Yes. Return to the Connect Telnyx screen anytime and re-run the import step. Newly added Telnyx numbers appear in the list immediately.
No. Removing an imported number from VoiceInfra only unlinks it from your VoiceInfra dashboard. The number continues to exist in your Telnyx account with all its existing configuration.
VoiceInfra shows an error message. Double-check that you are using a v2 API key (not a v1 key) from your Telnyx Portal. The key must start with KEY and be 64 or more characters long.
Yes. Any Telnyx number from any country appears in the import list with its country code (e.g., +1, +44, +91) and full number in E.164 format.