Projects App Guide

Source index

Official Sources Used By This Guide

This index lists the HubSpot documentation and changelog sources that support the guide pages. Re-open current official docs before production-affecting commands, uploads, submissions, or client delivery.

Independent educational guide. Not affiliated with, endorsed by, or sponsored by HubSpot. Verify critical commands and platform behavior against official HubSpot documentation before deploying.

Creation sunset and new app creation

Legacy Public App Creation Sunsethttps://developers.hubspot.com/changelog/legacy-public-app-creation-sunsetCreate a new app using the CLIhttps://developers.hubspot.com/docs/apps/developer-platform/build-apps/create-an-appHubSpot CLI project commandshttps://developers.hubspot.com/docs/developer-tooling/local-development/hubspot-cli/project-commands

Migration planning

Determine your migration path to 2026.03https://developers.hubspot.com/docs/apps/developer-platform/build-apps/migrate-an-app/overviewMigrate an existing public apphttps://developers.hubspot.com/docs/apps/developer-platform/build-apps/migrate-an-app/migrate-an-existing-public-appMigrate an existing app to 2026.03https://developers.hubspot.com/docs/apps/developer-platform/build-apps/migrate-an-app/migrate-to-the-latest-platform-versionMigrate an existing private apphttps://developers.hubspot.com/docs/apps/developer-platform/build-apps/migrate-an-app/migrate-an-existing-private-app

Marketplace and listing readiness

Listing your apphttps://developers.hubspot.com/docs/apps/developer-platform/list-apps/listing-your-app/listing-your-appApp Marketplace listing requirementshttps://developers.hubspot.com/docs/api/app-marketplace-listing-requirements

CRM card modernization

Legacy CRM cards guidehttps://developers.hubspot.com/docs/api-reference/crm-public-app-crm-cards-v3/guideClassic CRM cards deprecation changeloghttps://developers.hubspot.com/changelog/deprecating-support-for-classic-crm-cards

CLI reference

HubSpot CLI referencehttps://developers.hubspot.com/docs/developer-tooling/local-development/hubspot-cli/reference

Source Use FAQ

Are these sources enough for production-affecting HubSpot work?

No. This index shows the official HubSpot sources used by this independent guide, but developers should re-open current HubSpot documentation before production-affecting commands, uploads, submissions, or client delivery.

Does this site claim official HubSpot affiliation?

No. Projects App Guide is an unofficial, independent educational guide and does not claim HubSpot affiliation, certification, endorsement, sponsorship, or guaranteed migration results.

How should the May 26 and June 23, 2026 dates be described?

Describe them as dates affecting new legacy public app creation through the legacy Developer Platform UI. Do not describe them as existing legacy public app shutdown dates under this specific sunset.