Contentstack JavaScript Marketplace SDK

Mental model

contentstack.client(options) (lib/contentstack.js) creates an axios-based HTTP client pointed at the Developer Hub host (via @contentstack/utils + region), then wraps it with contentstackClient (lib/contentstackClient.js).
Auth: Pass authtoken and/or authorization, or call login to set authtoken on shared axios defaults. Optional refreshToken callback supports rotation.
Marketplace entry: client.marketplace(organization_uid) returns lib/marketplace/index.js — apps (app(), findAllApps, …), installations, hosting/deployments, webhooks, OAuth under app/oauth, authorization helpers, app requests.

Concern	Primary paths
Client defaults, User-Agent, region → host	`lib/contentstack.js`, `lib/core/region.js`
Login / logout / marketplace root	`lib/contentstackClient.js`
Axios, retries (429), timeout, query encoding	`lib/core/contentstackHTTPClient.js`
Request queuing	`lib/core/concurrency-queue.js`
Error shape	`lib/core/contentstackError.js`
Marketplace resources	`lib/marketplace/*/.js`
Public TypeScript types	`types/*/.d.ts`