Bing speech Text to speech is not working

Question

Bing speech Text to speech is not working

Hari Krishna, Gudditi 0

Azure bing speech from text to speech is not working.

Error 404 Failed to load resoursce : The server responded with a status of 400: https://speech.platform.bing.com/synthesize

The above error occured

Rohit Mungi 49,216 Reputation points Microsoft Employee Moderator

2024-11-12T08:50:11.2166667+00:00

@Hari Krishna, Gudditi Are you using an Azure speech resource created from Azure portal?

The tags added to this thread are for services which are created from azure portal which can be used programatically through SDK or REST API. The link you provided seems to be a link that is not supported by the services mentioned in the tags assigned to this thread.

Could you please add documentation or steps that you used to use this link?
Rohit Mungi 49,216 Reputation points Microsoft Employee Moderator

2024-11-13T12:11:55.2033333+00:00

@Hari Krishna, Gudditi Did you get a chance to review the above response and check if you are using an Azure speech resource?
Rohit Mungi 49,216 Reputation points Microsoft Employee Moderator

2024-11-14T12:12:43.7366667+00:00

@Hari Krishna, Gudditi Did you get a chance to review the above response? Thanks!!
Raveling, Josh L 0 Reputation points

2026-07-19T18:52:55.0966667+00:00
This appears to be down again. hitting: https://speech.platform.bing.com/consumer/speech/speechservice/v1.0/speech/voices/list

Getting:

<h2>Our services aren't available right now</h2><p>We're working to restore all services as soon as possible. Please check back soon.</p>0zxldagAAAAAOAU6LXG4PTp1JhafDIZvdU1RCRURHRTAzMDkARWRnZQ==

1 answer

Your answer

Rohit Mungi 49,216 Reputation points Microsoft Employee Moderator

2024-11-12T08:50:11.2166667+00:00

@Hari Krishna, Gudditi Are you using an Azure speech resource created from Azure portal?

The tags added to this thread are for services which are created from azure portal which can be used programatically through SDK or REST API. The link you provided seems to be a link that is not supported by the services mentioned in the tags assigned to this thread.

Could you please add documentation or steps that you used to use this link?
Rohit Mungi 49,216 Reputation points Microsoft Employee Moderator

2024-11-13T12:11:55.2033333+00:00

@Hari Krishna, Gudditi Did you get a chance to review the above response and check if you are using an Azure speech resource?
Rohit Mungi 49,216 Reputation points Microsoft Employee Moderator

2024-11-14T12:12:43.7366667+00:00

@Hari Krishna, Gudditi Did you get a chance to review the above response? Thanks!!
Raveling, Josh L 0 Reputation points

2026-07-19T18:52:55.0966667+00:00

This appears to be down again. hitting: https://speech.platform.bing.com/consumer/speech/speechservice/v1.0/speech/voices/list

Getting:

<h2>Our services aren't available right now</h2><p>We're working to restore all services as soon as possible. Please check back soon.</p>0zxldagAAAAAOAU6LXG4PTp1JhafDIZvdU1RCRURHRTAzMDkARWRnZQ==

Answer 1

The requests go to the Bing Speech host shown in the error, not a supported Azure Speech REST endpoint for an Azure resource. A 400 from its synthesis path, or a service-unavailable page from its consumer voices path, does not establish an Azure Speech resource outage.

Create or select a Speech resource, note its region, and replace the Bing host with the matching regional text-to-speech endpoint. Use /cognitiveservices/v1 for synthesis and /cognitiveservices/voices/list for voice discovery. Send the resource key in Ocp-Apim-Subscription-Key, or use a bearer token scoped to the same endpoint. Synthesis requires Content-Type: application/ssml+xml, X-Microsoft-OutputFormat, User-Agent, and valid SSML.

Test voice discovery first, then submit minimal SSML. A 401 indicates invalid authorization, often a key, token, endpoint, or region mismatch; for a 400, recheck required parameters, headers, and SSML. If the application hard-codes the Bing consumer host, update the integration; Azure configuration cannot redirect requests sent elsewhere.