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Evan Grayson

About me

Evan Grayson

I’m a full stack developer (started writing code in 2020) who went deep on GoHighLevel: building marketplace apps, wiring up API integrations, debugging workflow automations that don’t behave the way the documentation says they should. I’ve built tools live in the GHL marketplace, not just configured workflows inside it.

What I actually work on

Most of my work falls into a few buckets:

If you stuck on a GHL API quirk, or your agency needs something built that doesn’t exist as a marketplace app yet, that’s the work I take on.

Services

1. Custom API Integrations

Connect GoHighLevel to tools it doesn’t natively support. Stripe, QuickBooks, internal CRMs, custom databases, third-party SaaS. Built against GHL’s REST API v2, with proper OAuth and webhook handling.

2. Webhook & Automation Architecture

Inbound and outbound webhook setups, custom trigger logic, and workflow debugging for automations that need to do more than the visual builder allows.

3. GoHighLevel Marketplace App Development

Custom apps built for the GHL marketplace — for agencies that want proprietary tools instead of reselling generic GHL. End-to-end: spec, build, submission, approval process.

4. Make/n8n/Zapier + GHL Automation

Bridging GoHighLevel with automation tools for agencies running automation logic GHL’s native workflows can’t handle. Custom nodes, multi-step pipelines, error handling.

5. Third-Party Integration Setup

Zapier, Make.com, Twilio, WhatsApp Business API, Shopify, Calendly, Slack, Google Sheets — proper setup with error handling, not just the basic connector.

6. White-Label GHL Builds for Agencies

Custom-branded sub-account builds, funnel systems, and automation packages for agencies reselling GHL to coaches and service businesses.

7. GHL API Consulting

Stuck on rate limits, OAuth, endpoint behavior, or undocumented edge cases? Hourly or fixed-scope consulting for dev teams working against the GHL API directly.