VAPI•2mo ago

Auth header isn't sent

Hi, Despite I specify credentialId (to be sent to custom Transcriber server), which is copied from Dashboard - Settings - Integrations - Server Configuration - View details (under the proper's name), Auth was stopped being sent. Yesterday it worked, and the /calls 201 response still includes:
"assistant": {
"transcriber": {
"server": {
"url": "wss://vapi-soniox-transcriber-581.europe-west1.run.app",
"credentialId": "fb36a71f-359c-49be-b013-94e57744707e"
},
"provider": "custom-transcriber"
},
Can you please investigate why?

Vapi Support BotAPP•10/28/25, 1:34 PM

Suggestion:
Double-check that the Custom Credential referenced by your

credentialId

credentialId

(fb36a71f-359c-49be-b013-94e57744707efb36a71f-359c-49be-b013-94e57744707e) still exists and is active in your Vapi dashboard. If it was deleted or rotated, the auth header will not be sent. To resolve, re-create the credential if needed and re-link it in your assistant's configuration.
Example:

"transcriber": {
  "provider": "custom-transcriber",
  "server": {
    "url": "wss://vapi-soniox-transcriber-581.europe-west1.run.app",
    "credentialId": "fb36a71f-359c-49be-b013-94e57744707e"
  }
}

"transcriber": {
  "provider": "custom-transcriber",
  "server": {
    "url": "wss://vapi-soniox-transcriber-581.europe-west1.run.app",
    "credentialId": "fb36a71f-359c-49be-b013-94e57744707e"
  }
}

After updating, make a test call and check if the auth header is sent as expected.
See Custom Credentials setup for details.

Sources:

⤵️ Mention @Vapi Support Bot for follow-ups 🐥

Cconventional-black Hi, Despite I specify credentialId (to be sent to custom Transcriber server), wh...

technical-ivory•10/28/25, 3:52 PM

Hi, I can help investigate this issue. To clarify, when you say Auth stopped being sent, do you mean your custom transcriber server is no longer receiving the credential in the headers, or is it failing authentication on VAPI’s side? Also, were there any recent changes to the server or credentials before it stopped working?
@Balint

"transcriber": { "provider": "custom-transcriber", "server": { "url": "wss://vapi-soniox-transcriber-581.europe-west1.run.app", "credentialId": "fb36a71f-359c-49be-b013-94e57744707e" } }

Auth header isn't sent

Similar Threads

Similar Threads

Similar Threads