read_only_key

This key is read-only; it can't trade.

HTTP 403. Nothing reached the broker.

Likely cause: A read-only API key or agent key sent an order.

What to do: Use a full key.

Retry: No. The same request gets the same answer; change something first.

Listed under Keys, tokens and permissions in Errors. Send the error’s requestId to support and we can find the request.