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Digital Catalog organizes sellable products in the authenticated merchant and environment. Use its IDs to create charge snapshots without processor details.

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Assign digital_catalog:read for reads and digital_catalog:write for mutations. The gateway fixes merchant and environment from the key. Retrieve a snapshot from GET /v1/digital-catalogs/{catalog_id}/products/{product_id}/line-item. Send it as catalog_line_item when creating Checkout or Payment Links.
Do not build catalog_line_item manually. Use the snapshot returned by SimplePay.
Last modified on August 22, 2026