> Portal Navigation: > > - Append `.md` to any URL under `https://dev.wix.com/docs/` to get its markdown version. > - Pages are either content pages (article or reference text) or menu pages (a list of links to child pages). > - To get a menu page, truncate any URL to a parent path and append `.md` (e.g. `https://dev.wix.com/docs/sdk.md`, `https://dev.wix.com/docs/sdk/core-modules.md`). > - Top-level index of all portals: https://dev.wix.com/docs/llms.txt > - Full concatenated docs: https://dev.wix.com/docs/llms-full.txt ## Resource: startPurchasePlanFlow() ## Article: startPurchasePlanFlow() ## Article Link: https://dev.wix.com/docs/sdk/host-modules/workspace/apps/start-purchase-plan-flow.md ## Article Content: # startPurchasePlanFlow() Opens an app's premium plan purchase flow to upgrade the Wix user to a paid tier or higher pricing plan on the app. For apps made by Wix, this opens the app's premium upgrade modal. For 3rd-party apps, this opens a Wix pricing page modal. For specially configured 3rd-party apps, an external payment flow opens in a new tab. 
__Important:__ This method is only available in the Editor.## Method declaration ```ts (args: PurchasePlanFlowRequest) => Promise