running into a 403 Forbidden

[MigSanja]

Hello everyone,

I’m running into a 403 Forbidden when trying to create a call via the Telephony API. I’m using the official Quickstart code with my Telephony key hard-coded (not shown here for security):

curl -i -X POST https://api.ultravox.ai/api/calls
-H "Content-Type: application/json"
-H "X-API-Key: "
-d '{
"systemPrompt":"Test",
"model":"fixie-ai/ultravox",
"voice":"Susi-German",
"temperature":0.3,
"firstSpeaker":"FIRST_SPEAKER_AGENT",
"medium":{"twilio":{}}
}'

→ HTTP/2 403 Forbidden: “Your client does not have permission to get URL /api/calls”

Details:

I upgraded to the paid plan and generated new API keys.

GET https://api.ultravox.ai/api/calls also returns 403.

Previous calls on May 6 and May 11 succeeded; since then all show “Never joined.”

The same code and endpoint worked before.

Question:
Has anyone seen this? How do I get my account/key properly enabled for the Telephony scope so that POST /api/calls returns 200 OK with a valid joinUrl again?