Can message content be an array of parts?

Yes. content can be a plain string or an array of parts, but every part must be text:

{"role": "user", "content": [
  {"type": "text", "text": "Summarise this:"},
  {"type": "text", "text": "...long text..."}
]}

An image_url (or any non-text) part answers 400 unsupported_content, because SuperCosmos reads text only.

Good to know#

• If calls fail unexpectedly, check status.clatterlabs.com before debugging further.
• Every call shows in Console › Logs and Usage as Model API, with its price. See what you spent
• Retry only 429 and 5xx errors, with backoff; honour Retry-After when it's sent. Which errors to retry

Still need help?#

• General support: support@clatterlabs.com or team@clatterlabs.xyz
• Infrastructure questions, or permanent deletion of your data (your whole account or one service): infrastructure@clatterlabs.xyz

We usually reply within the first hour, and always within 24 hours. A full support team is with you.