---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/17550#article
headline: "17550: Invalid media URL"
url: https://www.twilio.com/docs/api/errors/17550
inLanguage: en
dateModified: 2026-09-17T18:23:40.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 17550: Invalid media URL

Log Type: APPLICATION

Log Level: ERROR

## Description

Twilio can't transcribe the audio because it can't resolve the media URL. The transcription is marked as `failed`.

### Possible causes

* DNS resolution fails for the host in the media URL.
* The URL points to a host that doesn't exist.
* The host or storage bucket isn't on Twilio's allowed list.

### Possible solutions

* Verify that the media URL is correct and publicly accessible, or provide a valid pre-signed URL.

### Additional resources

* [Transcribe an external recording](/docs/voice/api/batch-transcription-resource#transcribe-an-external-recording)