CurviatexMasterinbox
Bring LinkedIn chats into Masterinbox. Connect the two with Curviate’s webhooks and API, then build the flow you need.
What is Masterinbox?
Master Inbox is a unified reply inbox that gathers responses to cold email and LinkedIn campaigns from sequencers like Smartlead, Instantly and HeyReach. Agencies and outbound sales teams use it.
Visit masterinbox.comHow Masterinbox works with Curviate
Curviate posts LinkedIn events to Masterinbox: replies and account alerts within seconds, accepted invitations within a few hours. Route them through n8n, Make or Zapier and shape each message the way your team likes.
Events outmessage.receivedconnection.acceptedenrollment.finishedWhat you can build
Three flows teams set up first. Each one takes a few minutes.
Every reply, in Masterinbox
A new LinkedIn reply posts the message and the sender to the right place in Masterinbox.
message.received
Accepted invites, celebrated
Your team sees each accepted invitation, with the person and the account it came through.
connection.accepted
Account alerts
When an account needs to sign in again, its owner hears about it in Masterinbox right away.
account.reconnect_neededSet up Masterinbox with Curviate
Everything runs on two things Curviate gives every account: signed webhooks out and a REST API in.
- 1
Copy your Curviate API key
In the Curviate dashboard, open Settings, then API & Webhooks, and copy your key.
# keep it in your tool's credentials, never in plain text
CURVIATE_API_KEY=cvt_live_••••3f9a - 2
Connect Masterinbox to your automation
Sign in to Masterinbox inside n8n, Make or Zapier, or create an API key in Masterinbox if you write your own code.
- 3
Send Curviate events to it
Point a Curviate webhook at an n8n, Make or Zapier webhook trigger, or at your own endpoint. Each webhook covers one source:
messagingfor replies,userfor accepted invitations,motionfor Motion outcomes,account_statusfor account alerts.curl https://api.curviate.com/v1/webhooks \
-H "Authorization: Bearer $CURVIATE_API_KEY" \
-d '{
"source": "messaging",
"events": ["message.received"],
"account_ids": ["acc_…"],
"request_url": "https://hooks.zapier.com/hooks/catch/…"
}' - 4
Write to Masterinbox
Add the Masterinbox step your tool offers, such as creating or updating a message, and map the fields from the Curviate event.
# what your tool receives
{ "event": "connection.accepted",
"data": { "account_id": "acc_…", "occurred_at": "2026-10-17T09:12:00Z", … } } - 5
Check the signature
Every delivery carries a
Curviate-Signatureheader: an HMAC-SHA256 of the timestamp and the raw body, made with your webhook’s secret. Compare it before you act, and drop anything older than five minutes.Curviate-Signature: t=1792230000,v1=5f2c9a…e81b
# expected = HMAC_SHA256(secret, t + "." + raw_body)
Events you can use
message.receivedA LinkedIn message or InMail arrivedconnection.acceptedSomeone accepted an invitation you sent through Curviateenrollment.finishedA contact finished a Motion, with the reasonmotion.signalA Motion reached a step you marked to notify youpost.publishedA scheduled post went liveaccount.reconnect_neededAn account needs to sign in againActions you can call
POST /v1/contactsAdd or update a contactPOST /v1/motions/{id}/contactsStart a Motion for contactsPOST /v1/{account_id}/chats/{chat_id}/messagesSend a messagePOST /v1/enrollments/{id}/signalTell a waiting Motion to continueGET /v1/{account_id}/companies/{identifier}Read a company pageQuestions about Curviate x Masterinbox
Can each rep get only their own replies?
Yes. A webhook covers the accounts you pick, so each rep or team can have their own place in Masterinbox.
Which events can I send to Masterinbox?
Messages, accepted invitations, published posts, account status changes and every step of a Motion.
Do I need a developer?
No. n8n, Make and Zapier all have Masterinbox steps, so you can connect the two without code.
More messaging and inbox
Connect Masterinbox today.Free for 7 days.
Create your API key, point a webhook at Masterinbox and run your first flow.