> For clean Markdown of any page, append .md to the page URL. > For a complete documentation index, see https://ordergroove.ferndocs.com/docs/the-subscription-lifecycle/order-processing-placement/upsell-one-click-actions/llms.txt. > For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://ordergroove.ferndocs.com/_mcp/server. # Upsell & One-Click Actions > APIs, SDKs, and guides for building subscription commerce with Ordergroove. ## Docs - [Instant Upsell Overview](https://ordergroove.ferndocs.com/docs/the-subscription-lifecycle/order-processing-placement/upsell-one-click-actions/instant-upsell-overview.md) - [Instant Upsell through API](https://ordergroove.ferndocs.com/docs/the-subscription-lifecycle/order-processing-placement/upsell-one-click-actions/instant-upsell-through-api.md) - [1-Click Actions in Emails](https://ordergroove.ferndocs.com/docs/the-subscription-lifecycle/order-processing-placement/upsell-one-click-actions/1-click-actions-in-emails.md) - [Using Webhooks for 1-Click Actions](https://ordergroove.ferndocs.com/docs/the-subscription-lifecycle/order-processing-placement/upsell-one-click-actions/using-webhooks-for-1-click-actions.md)