Generate one SEO article from a topic (consumes 1 prepaid unit, $9 pay-as-you-go). Returns 202 + id; poll GET /articles/{id} until status=ready for markdown + html.

The keyword/topic to write about, e.g. "how to choose trail running shoes".

Optional opaque tag for YOUR end customer (e.g. "shop:1234"), stored on the article. For approved reseller accounts (contact support), the daily failed-article and cancel limits apply per tag under an account-wide ceiling, so one customer cannot lock out the others; on every other account the account-wide limits apply as without a tag. Never send secrets or personal data.