--- title: "Forum-Derived Top Questions (Zoom Apps)" ---

Forum-Derived Top Questions (Zoom Apps)

This is a checklist of the most common forum questions for **Zoom Apps SDK**.

Fast Routing Questions (Ask First)

• Running context: `inMeeting` vs `inMainClient` vs `inWebinar` vs `inImmersive` etc.
• SDK loading style: **NPM import** vs **CDN** (`window.zoomSdk`)
• Marketplace config: domain allowlist, scopes, and required capabilities

“App won’t load / blank panel”

Most common causes:

• domain not in Marketplace allowlist
• trying to run the app in a normal browser (needs preview/demo mode)
• blocked mixed-content or missing HTTPS in dev tunnel

“zoomSdk redeclaration” (CDN)

Common failure:

• redeclaring `let zoomSdk = ...` when CDN already defines `window.zoomSdk`

Answer pattern:

• use `const sdk = window.zoomSdk` or NPM import

Auth Confusion

Common asks:

• “Do I use OAuth redirects?”
• “How does In-Client OAuth work?”

Answer pattern:

• explain In-Client OAuth (PKCE) and required scopes
• differentiate from REST API OAuth flows