Here are the answers to your specific questions: Is the limit per-number or shared? It is shared across your entire Organization. This is why rotating through your 10 free numbers did not bypass the error. What is the exact limit? The limit is set to 10 outbound calls per day total for all free Vapi numbers combined. Do purchased Vapi numbers increase this limit? No. Standard Vapi-purchased numbers are primarily intended for easy testing and low-volume setups. They are still subject to shared safety limits to prevent platform abuse.

Is importing a 3rd party carrier the only way to scale? Yes. To scale your outbound operations without these daily caps, the recommended path is to Import a number from Twilio, Vonage, or Telnyx.

Why we have this limit: Free Vapi numbers are provided as a courtesy to help developers test "Hello World" scenarios and basic functionality. Because these numbers are shared across our infrastructure, we have to maintain strict daily caps to protect the reputation of the numbers and ensure high deliverability for all users.

The Solution for Scaling: Once you move into a production phase or need more than 10 outbound calls per day, you should purchase a number through your own Twilio, Vonage, or Telnyx account and import it into Vapi via the Phone Numbers > Import section in the dashboard. When you use your own carrier credentials, Vapi does not impose any outbound daily limits, and you are only subject to the limits of your own carrier.