Digital products

A digital product needs no stock, no shipping and no fulfilment step. When the payment clears, entitlements are granted inside the same transaction that records it — so there is no window where money has been taken and nothing is owed.

const result = await mercestack.checkout({ email });

if (result.library) {
  const library = await mercestack.getLibrary(result.library.accessToken);

  for (const item of library.items) {
    item.name;               // "Handbook.pdf"
    item.version;            // "2026 edition"
    item.licenseKey;         // "MSTK-A3F9-K2MN-7PQR", or null
    item.downloadsRemaining; // null means unlimited
    item.available;          // one flag, decided server-side
    item.unavailableReason;  // why not, when not
  }

  const { url, expiresIn } = await mercestack.getDownloadUrl(
    result.library.accessToken,
    library.items[0].entitlementId,
  );
}

How delivery is protected

• —A download link is single use and lives for ten minutes. Forwarded to a group chat, it is dead before anyone else clicks it.
• —The download count is spent when the link is *followed*, not when it is created — a link your customer never clicked costs them nothing.
• —Files are never served from a permanent storage URL. There is nothing to leak that keeps working.
• —Refunding an order withdraws access, and the customer is told why rather than meeting a silent failure.