AI Client Integration Guide • ChatGPT & OpenAI Codex

Connect GoHighLevel to ChatGPT Connectors & OpenAI Codex

Connect ChatGPT (Web, Desktop, iOS/Android) and OpenAI Codex CLI to your HighLevel agency via our RFC-compliant OAuth 2.1 Streamable HTTP endpoint (`https://ghlagencymcp.com/mcp`) or `.codex-plugin` bundle.

Connect Free MCP ($0/mo Starter) Unlock Agency Unlimited Free + $612 Bonus Vault Start 14-Day HighLevel Trial (?fp_ref=moosh)

Meeting OpenAI's Strict OAuth 2.1 & PKCE Connector Requirements

ChatGPT Developer Mode and Custom Connectors require RFC 9728 Protected Resource Metadata, RFC 8414 Authorization Server Metadata, RFC 7591 Dynamic Client Registration, and S256 PKCE—which local-only stdio wrappers do not provide.

Full OAuth 2.1 + PKCE Gateway + `.codex-plugin` Bundle

  • Serves `/.well-known/oauth-protected-resource` and `/.well-known/oauth-authorization-server` with Dynamic Client Registration (`/oauth/register`) and S256 PKCE (`/oauth/authorize`, `/oauth/token`).
  • Encrypts tenant credentials in memory with `ChaCha20-Poly1305` AEAD and executes every tool call in an isolated sandbox.
  • Includes `.codex-plugin/plugin.json` and `ghl-agency init-config --client codex` for OpenAI Codex CLI users.
  • Enforces read-only/dry-run safety defaults so ChatGPT never mutates a live sub-account without confirmation.

Side-by-Side Technical & Pricing Comparison

Capability / Requirement Local-Only Stdio MCP Wrappers Zapier ChatGPT Actions HighLevel Agency & Builder MCP
Works in ChatGPT Web & Mobile via OAuth 2.1 ❌ Fails (no HTTP / OAuth 2.1 endpoints) ⚠️ Requires per-zap paid tasks ✅ Native RFC 9728/8414 OAuth 2.1 + S256 PKCE
Sub-Account Audits, DNS, IVR & Snapshot Diffs ⚠️ Partial v2 CRUD ❌ Basic contact/lead triggers only ✅ All 55 native agency & builder tools

CLI & MCP Configuration

# In ChatGPT Settings -> Connectors -> Add Custom MCP Connector:
https://ghlagencymcp.com/mcp

# For OpenAI Codex CLI (~/.codex/config.toml):
ghl-agency init-config --client codex

Copy-Paste AI Prompt

Check the health of our HighLevel connection, list all sub-accounts in our agency, and run a readiness audit on location <LOCATION_ID>.

Aligned BYO-AI Pricing (Zero Sub-Account Taxes)

• Starter ($0/mo): 1 sub-account, unlimited read-only audits + 25 guided write runs/mo.
• Builder Pro ($29/mo or $22/mo w/ PARTNER25): Unlimited sub-accounts, funnel builder, 1-command IVR, Voice AI KB & DNS/BIMI.
• Agency Unlimited ($79/mo or $59/mo w/ PARTNER25): Full platform + Snapshot CI/CD (`SnapOps`), `fleet-audit`, PIT rotation & `ghl-mkt`.
• Member & GHL Affiliate VIP Unlock ($0/mo): 100% Free Agency Unlimited + $612 Operator Vault when you start/upgrade HighLevel via danielhallman.com/go/ghl-trial (?fp_ref=moosh).

View Plans & Instant Unlock

Frequently Asked Questions

Does `ghlagencymcp.com` support Dynamic Client Registration for ChatGPT?

Yes. `POST /oauth/register` implements RFC 7591 Dynamic Client Registration with strict HTTPS and loopback redirect URI validation.

Can I use OpenAI Codex CLI in local mode?

Yes. Run `ghl-agency init-config --client codex` to generate the `[mcp_servers.ghl_agency]` block for `~/.codex/config.toml`.