Website API Integrations: 15 Common Integrations Businesses Need

Most business websites need some combination of fifteen common integrations: CRM, payments, analytics, email marketing, customer support, booking, maps, authentication, inventory, shipping, accounting, marketing automation, search, ERP and AI services. Each connects the website to a system the business already runs on, so data moves automatically instead of being re-entered. Start with the integrations tied to revenue and lead capture, and add others as real operational needs appear.

This is a reference to what each integration does and what to plan for. For the technical mechanics, such as REST, webhooks, authentication and error handling, see the website API integration guide.

CRM, payments and email marketing sit closest to revenue, so they deserve the most careful implementation. A lost lead or an order stuck in a failed payment state costs real money. See the dedicated guides on CRM integration and payment gateway integration.

Analytics and marketing automation tell you what's working. The common failure is tracking page views but not the events that matter, such as form submissions, demo requests or checkout steps. Define key events before implementation, and respect consent requirements that apply in your markets.

Support chat, booking, maps, search and authentication shape how easy the site is to use. Many are delivered as client-side scripts, so watch their performance impact; a chat widget that delays every page load can cost more than it helps. The slow website guide explains how third-party scripts affect speed.

Inventory, shipping, accounting and ERP connect the website to how the business actually runs. These are usually two-way and business-critical, so decide which system owns each piece of data, what happens when records conflict, and how often data syncs.

AI integrations follow the same API patterns, with extra considerations: cost per request, response latency, what customer data is sent to the provider, and how outputs are checked before customers see them. ZSpace's AI automation work covers these in more depth.

Use native connectors or well-maintained plugins when they cover your needs, since they're cheaper and maintained by someone else. Build custom integrations when data flows are two-way, business-critical, or specific to how your company works, and when failures need proper visibility.

Integrations turn a website from a brochure into part of your operations. Start with the ones closest to leads and revenue, plan data ownership and failure handling for each, and add integrations as genuine needs appear rather than all at once.