Always-on WhatsApp for GoHighLevel agencies.
Plug WhatsApp into your HighLevel stack the way it should have worked from day one. Your clients scan one QR with the normal WhatsApp on their phone. The connection stays online 24/7, inbound messages fire into HighLevel as workflow triggers, outbound sends through one REST endpoint. No Meta Business API. No 24-hour window. No templates. No business verification. $15 per line per month, flat.
The only reason WhatsApp-on-HighLevel exists is to dodge Meta’s Business API. We dodge it harder.
Every WhatsApp-for-HighLevel product exists because the official Meta WhatsApp Business API is a non-starter for agency client onboarding: business verification, template pre-approval, the 24-hour customer service window, per-message + per-country billing. Days to weeks before your client’s first message goes out.
Mossmoon skips all of it. The connection runs through your client’s actual WhatsApp on their phone, so none of Meta’s Business API rules apply. Their phone stays the primary device. They use WhatsApp exactly as before. Mossmoon just keeps a hosted session online alongside it, so HighLevel sees every message, in real time, all the time.
Two webhooks. One inbound. One outbound.
Mossmoon doesn’t need a custom HighLevel app or a marketplace listing. The HighLevel side is two webhook steps you wire up once and reuse across every sub-account.
- 01
Provision a line for your client
POST /api/v1/wa/lines with the client's HighLevel sub-account ID as your external reference. Mossmoon returns a line_id and a connect_url. No charge yet. Billing only starts when the QR is actually scanned.
- 02
Embed the connect URL in your portal
Drop the URL in your client portal as a 'Connect WhatsApp' button, link, or iframe. Your client clicks it, opens WhatsApp on their phone, scans the QR. They never see Mossmoon's branding if you embed it as an iframe.
- 03
Inbound → HighLevel workflow trigger
Point Mossmoon's message.received webhook at a HighLevel Custom Webhook trigger inside the matching sub-account. Every inbound WhatsApp message now fires a HighLevel workflow. Route it to a contact, tag it, kick off automation, whatever the workflow does.
- 04
Outbound → HighLevel workflow action
In any HighLevel workflow, add a Custom Webhook step that POSTs to /api/v1/wa/messages with the line_id and the message body. That's your 'Send WhatsApp' action, reusable in every funnel, drip, and automation.
Three patterns HighLevel agencies ship in week one.
AI receptionist on the client's WhatsApp
Inbound message hits a HighLevel workflow, which calls your AI model, which writes back through Mossmoon's send endpoint, all under the client's existing WhatsApp number. No second number for the client to maintain. No 'AI bot' badge for end-customers to notice.
Sales follow-up without the 24-hour window
HighLevel can text a lead three days after they go cold without you pre-approving a template. The follow-up sends like a human typed it, because, structurally, it's going through the same channel a human would use on the same phone.
Appointment booking with WhatsApp confirmation
HighLevel calendar booking fires a workflow that sends the confirmation + reminders through the client's WhatsApp. End-customers reply 'reschedule' in the same thread, the inbound webhook routes it back into a HighLevel rebook workflow.
Flat per-line. Easy to mark up.
$15 per active WhatsApp line per month. No per-message fees, no per-country rate cards, no per-seat charges. First line is free for 7 days from when your client’s line goes ready.
Predictable per-line cost means you can resell to your HighLevel clients on a flat agency markup without worrying about a surprise bill the month one of their campaigns pops off.
Unlimited inbound + outbound. Text, images, video, voice notes, documents. First line free for 7 days.
Everything in messaging, plus outbound voice calling through the client’s WhatsApp. Unlimited minutes, no per-minute fees.
What HighLevel agencies ask before signing up.
Two webhooks. Outbound: in your GHL workflow, add a Custom Webhook step that POSTs to Mossmoon's /api/v1/wa/messages. That becomes your 'Send WhatsApp' action inside any GHL automation. Inbound: point Mossmoon's message.received webhook at a GHL Custom Webhook trigger, and every inbound WhatsApp message becomes a workflow trigger inside HighLevel.
From your agency's point of view, you're now selling 'WhatsApp inside HighLevel' to your clients, and the WhatsApp leg actually stays online.
No. Mossmoon doesn't use the WhatsApp Business API at all. Your client never touches Meta Business Manager, never uploads documents, never waits for display-name review. They open WhatsApp on their phone, scan a QR, done.
This is the same reason agency-WhatsApp tools for HighLevel exist in the first place: skipping the Business API onboarding is the whole product.
No. The 24-hour rule is a Meta Business API policy. Because Mossmoon connects through your client's actual WhatsApp on their phone, that constraint doesn't apply. You can send any message any time, the way a human would on the same phone.
Same reason: no template approval, no 'utility vs marketing' categorization, no per-message fees.
Embed our connect URL anywhere in your client portal as a link, button, or iframe. They click it, open WhatsApp on their phone, scan the QR, see ✓ Connected. Mossmoon fires line.ready to your webhook within seconds and the line starts billing.
Total time, end to end: under two minutes. Compare that to days of Meta Business Verification for a Business API onboarding.
Flat $15 per active WhatsApp line per month. Unlimited inbound, unlimited outbound, no per-message fees. First line is free for 7 days, and the trial only starts when your client actually scans the QR, not when you sign up.
If you want voice calling on the line (click-to-call from your HighLevel dashboard), that bumps the line to $20/mo with unlimited minutes.
The hosted Mossmoon connection stays online even when their phone is asleep, on a plane, or out of signal. If the phone stays offline long enough that the line needs re-authorizing, we detect it automatically and fire line.disconnected with a reconnect_url.
The line_id stays the same, so your HighLevel records don't have to migrate. And we don't double-charge inside an already-paid month.
Not when used the way the platform is built for: real one-to-one conversations. Mossmoon rate-limits outbound, throttles bursts, and refuses patterns that look like cold blasts.
We don't recommend or support unsolicited mass marketing through this channel. That's the fastest way to get any WhatsApp account flagged. If you want to mass-broadcast, the Business API is the right tool for the wrong product. Treat WhatsApp like a phone and lines stay healthy long-term.
Yes. Each phone number is one line, provisioned and billed independently. Useful when a client runs separate WhatsApp numbers for sales, support, or different brands inside the same HighLevel sub-account.
Each line has its own line_id, its own QR, and its own webhook payloads, so you can route inbound from different brands into different HighLevel workflows.
Wire WhatsApp into your HighLevel stack this afternoon. First line free for 7 days.
Coming from another tool? Goghl.ai · Twilio · WATI · Business API vs personal API