Does GoHighLevel have an API?

Yes — a REST API (v2) with OAuth 2.0 authentication, covering contacts, conversations, opportunities/pipelines, calendars/appointments, forms, custom fields, and more, documented at highlevel.stoplight.io (linked from the developer portal at marketplace.gohighlevel.com). Inbound webhooks push events to your systems, workflow webhook actions call external services mid-automation, and developers can publish marketplace apps that install into any account.

What can I build with the GoHighLevel API?

Common builds: syncing contacts and appointments with external systems (an AMS, EHR front-desk tools, custom databases), pushing leads from custom apps into pipelines with automation triggers, custom reporting dashboards pulling pipeline and conversation data, middleware connecting GHL to industry software, and SaaS products distributed as marketplace apps to GoHighLevel's agency user base.

Do I need the API or is Zapier enough?

For most one-to-one integrations (form tool → GHL contact, GHL appointment → Google Sheet), Zapier/Make or the native workflow webhook actions are faster and cheaper than custom code. Reach for the API when you need bulk operations, two-way sync, multi-tenant agency tooling, or a product you'll distribute. The webhook-action-inside-workflows feature covers a surprising amount of 'custom' need without any hosted code.

Does the GoHighLevel API have rate limits?

Yes — per-app/per-location request limits (with burst and daily ceilings) that matter for bulk syncs; design imports as queued batches rather than blasts. Limits and scopes are enforced per OAuth app, and marketplace review applies to published apps. Check current limits in the developer docs before architecting high-volume syncs.

GoHighLevel API (2026): What Developers Can Actually Build

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TL;DR — GoHighLevel ships a REST API v2 with OAuth 2.0 (contacts, conversations, pipelines, calendars, forms, custom fields), webhooks both directions — inbound event pushes and webhook actions inside workflows — and a marketplace for distributable apps. Build custom sync, dashboards, or agency tooling with it. But for one-to-one glue, the native workflow webhooks or Zapier/Make beat custom code on time and maintenance. Docs live via the developer portal (marketplace.gohighlevel.com).

The surface area

Capability	What it covers
REST API v2 (OAuth 2.0)	Contacts, conversations/messages, opportunities & pipelines, calendars/appointments, forms/submissions, custom fields, users, locations (sub-accounts)
Inbound webhooks	Event pushes (new contact, appointment, pipeline stage change…) to your endpoint
Workflow webhook actions	Call any external URL mid-automation — custom logic without polling
Marketplace apps	OAuth apps installable across accounts; how vendors ship products to GHL's agency base
Rate limits	Per-app/per-location request ceilings — queue bulk syncs, don't blast

What people actually build

Two-way sync with industry systems — the missing links this site keeps flagging (AMS for insurance, FSM for home services, PMS for dental) get bridged with exactly this API plus middleware.
Custom lead routers — score and route inbound leads into pipelines with automation triggers attached.
Reporting dashboards — pull pipeline, attribution, and conversation data into BI tools beyond native reporting.
Marketplace SaaS — a product distributed to tens of thousands of agencies; several successful micro-SaaS businesses are just "a missing GHL feature, done well."

When NOT to use the API (honest version)

If the sentence is "when X happens in one system, do Y in the other," you don't need custom code. Native workflow webhook actions handle the outbound half; Zapier/Make handles the rest with zero hosting. The API earns its complexity at bulk scale, two-way sync, or multi-tenant tooling. Write code for products; use glue for plumbing. More on connection options: integrations guide.

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Frequently asked questions

Is there an API?

Yes — REST v2, OAuth 2.0, plus webhooks both directions and a marketplace app model.

API vs Zapier?

One-to-one glue → Zapier/native webhooks. Bulk, two-way, multi-tenant, or products → API.

Rate limits?

Per-app/per-location ceilings — queue bulk operations; check current docs.

Where are the docs?

Via the developer portal at marketplace.gohighlevel.com.