ISV embed
Software companies embedding the API in their product — not a white-label partner portal.
Embedding the API vs a white-label partner portal
SaaS products that embed messaging stay on the ISV surface. White-label partner portals stay under Partner — do not mix brand, keys, and ops ownership.
End-user send still hits one prepaid ledger
Embedded Send still debits the ISV prepaid wallet. Do not invent a second ledger the product does not fund — holds, retries, and idempotency stay honest.
When an embedded tenant cap must stop send
Fair-share caps inside an ISV product must hard-stop send for that tenant — never return a fake delivered API 200 when the cap is hit.