Eduardo's partner embedded-checkout contract (Oct 20, 2026). One call per signup, from our server, never from the browser.
POST {DFC_API_URL}/partners/<offer name>/embedded-checkout
x-api-key: <key>
Content-Type: application/json
{
"email": "person@example.com",
"partner": "nift",
"utmSource": "niftoffer1",
"utmMedium": "post_checkout_placement",
"utmCampaign": "nift_2026",
"landingPage": "niftoffer1",
"coupon": null,
"returnUrl": "https://dfc-partner-pages.vercel.app/welcome?session_id={CHECKOUT_SESSION_ID}",
"partnerReferenceId": "<partner click id from the landing link, or empty>"
}
→ { "clientSecret": "cs_..." } 409 = already a paid member 401 = bad key 404 = no Partner Page of that name
Price, trial length and membership are set on the Partner Page in DFC's admin portal with the same name as the offer. Our pages only word the offer. Offer names: niftoffer1 (/nift), niftoffer3 (/nift2), niftoffer4 (/nift2/b), discooffer1 (/disco), discoshipping1 (/disco-shipping).