Via API steps and webhooks No app to install: Kerux talks to Instantly's API with HTTP steps and webhooks, set up once.

LinkedIn first, then Instantly email

Q: Will a lead who already got an email from Instantly be added twice?

Not if the step sends skip_if_in_campaign (or skip_if_in_workspace) as true: Instantly then skips leads it already has. Kerux also runs each step once per lead.

When a lead doesn't answer on LinkedIn, an API step adds them to your Instantly campaign. When they reply to an email, Kerux stops the LinkedIn follow-ups.

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How it works

Campaign
1. Invitation accepted
2. LinkedIn message, no reply
3. Instantly: add to campaign
LinkedIn goes first
Invitation and message out, no answer after 5 days.
Instantly takes over
Maria joins your email campaign with her name and company.
Maria Lopez
1. Replied to the Instantly email
2. LinkedIn follow-up 2
3. Owner told in Slack
A reply stops everything
Instantly tells Kerux, LinkedIn follow-ups are skipped.

An example workflow

Send the LinkedIn invitation, then a first message when it's accepted.
Wait 5 days for a reply. If the lead answers on LinkedIn, the campaign ends there.
No reply: a Webhook / HTTP step adds the lead to your Instantly campaign with email, first_name and company_name.
A Wait for webhook step listens for Instantly's reply_received event, matched on lead_email.
Reply received: skip the remaining LinkedIn steps and post the reply to your team.

What data flows

Kerux sends to Instantly

email
lead.first_name
lead.last_name
lead.company
lead.linkedin_url

Instantly sends to Kerux

Instantly's answer, such as the lead's id in Instantly.

Set it up

In Instantly's settings, create an API v2 key under Integrations with the leads:create scope. Kerux sends it as a bearer token.
In Kerux, open Integrations > Connections and click Connect on Custom API (under Developers). Pick how Instantly signs in, paste the key and Instantly's Base URL, click Save, then Test connection.
Add a Webhook / HTTP step after your LinkedIn steps: POST /api/v2/leads with campaign (your campaign's id), email, first_name, last_name, company_name and skip_if_in_campaign: true.
To stop on replies, add a Wait for webhook step with a shared URL matched on lead_email, and create an Instantly webhook for reply_received with that URL.
In the campaign's Builder, click Test to open Test on one lead: the lead's journey shows what Kerux sent to Instantly and what came back.

Plan limits: Instantly's API is on its Growth plan and up; webhooks start at Hypergrowth (Instantly's own guide). Without webhooks, pause leads from Kerux instead.

Questions

Does Kerux have a native Instantly integration?

Not a one-click app. Kerux works with Instantly today through Instantly's own API: you save your Instantly key once in Kerux, then HTTP steps and webhooks do the work inside your campaigns. Nothing to install and no Zapier needed.

Will a lead who already got an email from Instantly be added twice?

Not if the step sends skip_if_in_campaign (or skip_if_in_workspace) as true: Instantly then skips leads it already has. Kerux also runs each step once per lead.

Do I need Instantly webhooks?

Only to stop LinkedIn when someone replies by email. Instantly's webhooks start on its Hypergrowth plan; without them, Kerux still adds leads to your campaign, and you stop a lead's LinkedIn steps from Kerux.

What happens if Instantly is down or refuses a call?

The lead stops with Instantly's own error message and shows in Need attention with a Retry button. It never shows as finished because a call failed, and nothing else goes out to that lead until you decide.

Use it in a campaign

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