API - Error Code 400 or 401

These error codes can have a number of causes.  The response message will indicate the cause of the error.

The maximum number of characters per request depends on the model.

• Flash v2.5 - up to 40,000 characters (~40 minutes of audio)
• Turbo v2.5 - up to 40,000 characters (~40 minutes of audio)
• Flash v2 - up to 30,000 characters (~30 minutes of audio)
• Turbo v2 - up to 30,000 characters (~30 minutes of audio)
• Multilingual v1 and v2 - up to 10,000 characters (~10 minutes of audio)
• English v1 and v2 - up to 10,000 characters (~10 minutes of audio)

This means that you have not set your API key correctly.  Please make sure you're using "xi-api-key" exactly, with no typos, when setting your API key.

This means that you have entered the incorrect voice_id.  Please check that you are using the correct voice_id for the voice you want to use.  You can check this in My Voices.

You have insufficient quota to complete the request.  You can purchase Pay As You Go credits, or on legacy Creator, Pro, Scale and Business plans, you can enable usage based billing from your Subscription page.

Example 400 response detail:

"detail": { "status": "max_character_limit_exceeded", "message": "This request's text has 627 characters and exceeds the character limit of 333 characters for non signed in accounts." }

Example 401 response detail:

"detail": { "status": "invalid_api_key", "message": "Invalid API key" }