The Embed API is priced per finalized contract. A transaction is counted when a builder session is finalized for the first time. Finalization typically happens when the end-user completes the document in the Builder UI, but it can also be triggered via the API. The transaction cost may vary depending on the template used.
If a session is unfinalized and then finalized again, no additional transaction is charged. Each builder session is billed at most once, regardless of how many times it is finalized.
Pricing is always agreed separately as part of your account setup. For details, please contact us at support@docue.com.