Short answer
Your API key is scoped by product. Text-to-speech is enabled on your key, but Sound Effects and Forced Alignment are not. ElevenLabs API keys are restricted by default and you must explicitly grant product-level permissions per key. That’s why POST /v1/text-to-speech/{voice_id}/with-timestamps works while POST /v1/sound-generation (Text to Sound Effects) and POST /v1/forced-alignment return missing_permissions. (help.elevenlabs.io)
How to fix
In the dashboard: Developers → API Keys → Edit your key.
Either disable “Restrict key” or enable the specific features for:
Creator tier is eligible to use these APIs; the error is about key scope, not plan entitlement. Sound Effects and Forced Alignment are documented public APIs (Forced Alignment is billed like STT). (elevenlabs.io)
If you’re using a Workspace/Service Account key, a workspace admin must update that key’s permissions in Workspace settings or issue a new key with the right scopes. (elevenlabs.io)
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