iMessage for GoHighLevel

GoHighLevel is where a large share of small-business messaging already lives, so the question is rarely 'should we text customers' — it is 'why is our texting green when our competitor's is blue'. The answer is that GHL has SMS and email channels, and no iMessage channel, because Apple publishes no API for one.

So you bolt one on. There are three ways to do it, and they differ mostly in how much of the wiring you own.

The three routes

Wiring it yourself, concretely

If you take the third route, the shape is small. GHL workflows can call an outbound webhook; that is your send path. Inbound needs an endpoint of your own plus a write back into GHL.

// Called by a GoHighLevel workflow's outbound webhook action.
export async function POST(req: Request) {
  const { contact_id, phone, message } = await req.json();
 
  const res = await fetch("https://api.example-provider.com/v1/messages", {
    method: "POST",
    headers: {
      Authorization: `Bearer ${process.env.IMESSAGE_API_KEY}`,
      "Content-Type": "application/json",
      // Idempotency: GHL retries, and a retry must not double-text anyone.
      "Idempotency-Key": `ghl-${contact_id}-${hash(message)}`,
    },
    body: JSON.stringify({ to: e164(phone), text: message }),
  });
 
  if (!res.ok) return new Response("send failed", { status: 502 });
 
  const { id } = await res.json();
  // Store the provider id against the contact so the reply can find its way home.
  await linkMessage({ providerId: id, contactId: contact_id });
  return Response.json({ ok: true, id });
}

The reply half writes back into GoHighLevel. The important detail is matching on a normalised number rather than whatever format the CRM happens to be holding — (555) 123-4567, 555-123-4567 and +15551234567 are one person, and naive matching drops the third one on the floor.

import { after } from "next/server";
 
export async function POST(req: Request) {
  const raw = await req.text();
  if (!verifySignature(req.headers.get("x-signature"), raw)) {
    return new Response("bad signature", { status: 401 });
  }
 
  after(async () => {
    const event = JSON.parse(raw);
    const phone = e164(event.from); // normalise before you match on it
 
    const contact = await ghl.searchContact({ phone });
    if (!contact) return await ghl.createContact({ phone, source: "imessage" });
 
    await ghl.addInboundMessage({
      contactId: contact.id,
      body: event.text,
      direction: "inbound",
      // Anything the team should see must land on the timeline, not just in your logs.
    });
  });
 
  return Response.json({ ok: true });
}

What it costs, in GHL terms

The pricing shape is different from GHL's own SMS billing, and that catches people out. iMessage lines are almost always a flat monthly rate per line with no per-message fee — so cost scales with how many numbers you run, not how hard you work them.

• [Texting Blue](/pricing/texting-blue-reviews) — $19/month is the published floor if you just want a line.
• [Blooio](/pricing/blooio-reviews) — $39/month flat, an OpenAPI spec, and webhooks to wire in.
• [Sendara](/pricing/sendara-reviews) — $249 first line, $149 for each additional, $99 setup. Priced at the top of the field, with the CRM integrations as the product.
• [iBluSend](/pricing/iblusend-reviews) — $79/$199/$399 tiers, with the agency portal at the top. You supply the Mac and Apple Account.
• [Linq](/pricing/linq-reviews) — no published price. A sales conversation, a SOC 2 report, and RCS, SMS and voice in the same API.

The rules do not change because it is blue

GHL agencies tend to arrive with a working understanding of A2P registration, opt-outs and quiet hours from the SMS side. All of it still applies. The blue bubble changes how the message is received, not whether you were allowed to send it.

• [Consent before you text](/guides/consent-before-you-text) — the part no provider will fix for you.
• [Quiet hours and frequency](/guides/quiet-hours-and-frequency) — the fastest way to burn a line is to work it too hard.
• [A2P registration](/guides/a2p-registration) — what carries over from your SMS setup and what does not.
• [UTM tagging for text messages](/guides/utm-tagging-for-text-messages) — so the attribution survives the channel change.

If you are still choosing a vendor rather than wiring one in, the best iMessage API for CRM is the shortlist, and what each provider costs is the table.