VAPI•7mo ago

404 when connecting to twillo

I tried connecting number from twillo to Vapi, and every time i call it im getting Application error, and i see this in Twillo logs:

Message

Got HTTP 404 response to https://api.vapi.ai/twilio/voice

Error Description
We try to provide specific webhook errors whenever possible, however in this instance we are unable to identify the exact cause of the webhook delivery/response issue. To prevent 11200 errors, ensure that your webhook receiving infrastructure can quickly respond to inbound Twilio requests with a 2xx status code.

Vapi Support BotAPP•6/6/25, 6:41 PM

Thanks for sharing those details! I couldn't find enough info in the docs to solve the 404 error you're seeing when connecting your Twilio number to Vapi. I'm escalating this to a human teammate so we can get you a proper answer.

In the meantime, you might want to double-check your Twilio SIP trunk and Vapi configuration steps, just in case something was missed. Here are some helpful links if you want to review:

Hang tight—someone from the team will follow up soon!

⤵️ Mention @Vapi Support Bot for follow-ups 🐥

KyleAPP•6/7/25, 3:11 AM

Please ensure this number is configured correctly on the Vapi side. Hey,

You can check out this guide: https://docs.vapi.ai/advanced/sip/sip-trunk for details on integration.

Note: This is a standard guide used by many telephony providers, so it should be helpful.

moderate-tomatoOP•6/7/25, 7:21 AM

Hello, this number was bought a long time ago thru Vapi, so it should be configured, and I only need inbound. I fixed that bug, I had GET set instead of POST on the webhook, but now I have a problem, when I call it is an application error, and in twillo logs I see the status: no answer, as if vapi did not give an answer?

KyleAPP•6/7/25, 9:14 AM

Can you send the phone number id, and the request from the webhook that is getting the error?

moderate-tomatoOP•6/7/25, 4:03 PM

phone number id from vapi:
0350f2e1-d522-4ee5-91ce-147e00721f19

And webhook settings in photo

moderate-tomatoOP•6/7/25, 8:03 PM

hi, i got webhook error again

moderate-tomatoOP•6/7/25, 8:03 PM

404 on your webhook

moderate-tomatoOP•6/7/25, 8:09 PM

i think i should use custom webhook server url, but i cant find it in Vapi dashboard

moderate-tomatoOP•6/7/25, 8:22 PM

ok nevermind, solved

moderate-tomatoOP•6/7/25, 8:23 PM

url should be twillo/inbound_call, not twillo/voice

KyleAPP•6/9/25, 7:38 PM

Glad the issue was resolved. Please reach out to us if you have any other questions regarding this issue

404 when connecting to twillo

Similar Threads

Similar Threads

Similar Threads