The JustCall integration connects your JustCall cloud phone system to your iClosed Unified Inbox. Every number on your JustCall account becomes available to send from, replies land straight in your inbox, and your calls — inbound, outbound, missed, and voicemails — are logged automatically on each contact's journey, alongside your messages.
JustCall is an AI-powered cloud phone system and communication platform built for sales, support, and revenue teams. Because it's a full phone system (not just a messaging transport), this integration gives you two things in one:
An SMS/MMS channel in the shared inbox thread, just like your other channels.
A voice / call-activity layer that logs calls, voicemails, recordings, and AI transcripts/summaries onto the contact timeline.
Like Twilio, JustCall is an account-level integration: a single workspace-wide connection, set up once by an admin and shared by all your setters and closers.
⭐ Integration is available with Growth and Business subscription plans — check out the full breakdown here.
Step-By-Step Guide
Navigate to Settings → Integrations → Communication and locate the JustCall card to begin.
This integration consists of two main parts:
Connection
Post-connection configuration
Step 1 — Connection
JustCall is connected by an admin using your JustCall API credentials.
Click the Integrate button on the JustCall card.
In the Connect JustCall window, enter your API Key and API Secret. You'll find both on JustCall's API credentials page (link provided in the window).
(Where prompted) select which JustCall phone number(s) should map into the inbox.
Click Done.
Important: JustCall's API requires their Team plan or above. On lower JustCall plans, the connection will fail to verify.
iClosed validates your credentials on save and shows a clear pass/fail state. If the credentials are wrong (or your JustCall plan doesn't include API access), the connection is rejected with an error. Your API Secret is stored securely and is never exposed to non-admin users.
Step 2 — Post-Connection Configuration
Once connected, you can turn on or off the option to create chats for non-contacts:
When ON (Recommended) Any time a number that isn't in your iClosed Global Data messages your JustCall line, iClosed automatically creates a fresh contact card and opens a live chat in your Unified Inbox.
When OFF Messages from numbers not already saved in your Global Data are ignored.
Disconnecting JustCall
If you need to switch accounts or safely disconnect JustCall from the workspace:
Open the JustCall integration and click the Disconnect (Delete Channel) button.
Confirm your decision in the pop-up modal to sever the connection.
Important Notes
What happens when you disconnect the channel:
All previously synchronized messages, call logs, recordings, and transcripts remain safe inside your contact journeys — no customer records are deleted.
Your workspace loses the ability to receive inbound messages/calls or send outbound texts through this JustCall line.
Automated workflow actions tied to this JustCall channel pause until a replacement channel is selected.
Calls, voicemails, and AI summaries in the inbox
This is what sets JustCall apart from a messaging-only channel. Alongside SMS, JustCall logs your voice activity onto the contact's timeline:
Completed, missed, and voicemail calls are written as call-activity entries on the matching contact, with direction (inbound/outbound), agent, duration, and timestamp.
Recordings are attached to the call entry so you can listen back from the contact card.
AI transcripts, summaries, and voicemail transcriptions are attached when JustCall generates them, so a closer can catch up on a call without listening to the whole thing.
Calls and voicemails appear as activity entries (similar to how Zoom and Fathom call logs work), visually distinct from chat message bubbles. Missed calls and voicemails are visible in the inbox so your team can follow up fast.
Tip: Missed calls and voicemails make strong workflow triggers — for example, auto-send an SMS follow-up when a lead's call goes unanswered (see Workflows below).
How to Use JustCall Inside the Composer
Once connected, sending a JustCall message takes moments:
Open any lead thread inside the Unified Inbox.
In the Smart Message Composer, select JustCall as your active channel from the channel switcher.
(If you have multiple numbers) pick the number to send from, or use your default.
Type your message, or use the # shortcut to pull up a message preset. You can add emojis, dynamic variables, and Media Library attachments (sent as MMS).
Press Send.
Outbound JustCall messages appear right-aligned with the JustCall channel icon on the sender avatar, consistent with your other channels.
Delivery status updates on each message as JustCall reports it — Sent, then Delivered, or Failed (with the JustCall error surfaced) if it didn't go through.
Note: Standard SMS has no read receipts, so the Read state won't light up for SMS messages the way it can on chat-based channels.
Workflows & Analytics
Workflows: JustCall appears as a selectable channel in Inbox Workflows once it's connected, matching the "only connected channels appear" behavior. Missed-call and voicemail events make especially useful triggers (e.g. auto-SMS on a missed call). Automated JustCall messages are flagged as automated (the "A" avatar).
Analytics: JustCall SMS volume feeds your Inbox Analytics — Message Volume, Top Channels, and response-time metrics — and shows as its own channel in Channel Insights, so you can compare reply rates against your other channels.
Compliance — A2P 10DLC (US messaging)
Just like Twilio, US SMS compliance is your responsibility and is handled entirely inside your JustCall account. iClosed only connects to the JustCall account you already own — we don't register, manage, or monitor your compliance. If your messages aren't delivering, that's resolved on JustCall's side, not in iClosed.
US carriers require A2P 10DLC registration for application-sent SMS to US phone numbers. Traffic from unregistered numbers is filtered or blocked, so messages may silently fail to deliver until you complete registration in JustCall.
A few things to plan for on the JustCall side:
Complete A2P 10DLC brand and campaign registration in JustCall before sending to US numbers.
Opt-out is mandatory and handled for you — STOP / UNSUBSCRIBE / HELP keywords are processed automatically, and once a recipient opts out you can't message them again.
Any registration fees and messaging charges are billed by JustCall directly to your JustCall account.
Unregistered US SMS is the number-one cause of "my messages aren't arriving" — and it's fixed in JustCall, not iClosed.
Messaging Costs
JustCall is billed the same way as any other paid channel on your plan. Note that JustCall's own usage charges (per-message SMS/MMS fees, call minutes, number rental, A2P registration fees) are billed by JustCall directly to your JustCall account, separate from iClosed.
FAQs
## Is the messaging working as a 2-way sync? Yes. Inbound and outbound SMS/MMS both appear in the same contact thread in your Unified Inbox.
## Does JustCall log my calls too, or just texts? Both. SMS/MMS appear as messages in the thread, and completed, missed, and voicemail calls are logged as call-activity entries on the contact — with recording and, when available, transcript and AI summary attached.
## Can I make calls directly from iClosed? The current integration logs your JustCall call activity into the inbox. An embedded click-to-call dialer is planned as a follow-up — until then, you place calls in JustCall and they log automatically onto the contact.
## Why won't my JustCall connection verify? JustCall's API requires their Team plan or above. On lower JustCall plans the API isn't available, so the connection can't be validated. Confirm your JustCall plan and that your API Key and Secret are correct.
## Why aren't my JustCall messages being delivered? For US numbers, the most common cause is missing A2P 10DLC registration — carriers filter unregistered traffic. This is resolved in your JustCall account, not in iClosed. Failed messages surface the JustCall error on the message.
## Why can't my team see a "Read" status on SMS? Standard SMS doesn't support read receipts, so iClosed can show Sent and Delivered but not Read for SMS.
## What happens if someone replies STOP? JustCall processes the opt-out automatically and blocks further messages to that number.
## Do I need my own JustCall account? Yes. This integration connects your own JustCall account (Team plan or above), so you keep control of your numbers, calls, and JustCall billing.
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