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Pro plan. Zapier works through trigger URLs, webhooks, HTTP steps and listeners (and API keys to read a contact), which are part of Pro and Agency (and the free trial). Anything you already have keeps working on every plan. See Plans and billing.
Zapier connects to Kerux with Webhooks by Zapier: POST sends people to a campaign, Catch Hook receives Kerux events. There’s no Kerux app in Zapier’s directory yet.
How it connects: Kerux’s trigger URLs and webhooks, with Zapier’s Webhooks by Zapier.

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Before you start

  • Zapier plan: Webhooks by Zapier is a premium app, available on Zapier’s paid plans.

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1. Send people from a Zap to a campaign

1

Copy the trigger URL

In Kerux, open the campaign, click + Add on the Trigger half of the start box and choose Incoming webhook (API). Click Add, then Copy link.
2

Add Webhooks by Zapier > POST

URL: the trigger URL. Payload Type: json.
3

Fill in Data

One row per field: linkedin_url (required), first_name, last_name, email, company, title. Extra fields go under custom: with Zapier’s Unflatten option on (its default), a key with double underscores like custom__source is sent as custom.source.
What Kerux needs (JSON):
Kerux answers 202 with { "data": { "enrolled": 1, "already_in": 0, "lead_ids": ["..."] } }.

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2. Receive Kerux events in a Zap

1

Start a Zap with Webhooks by Zapier > Catch Hook

Copy the webhook URL Zapier gives you.
2

Add the endpoint in Kerux

In Integrations > Developers, under Webhooks, paste it and pick the events (for example reply.positive). Click Send test event, then Test trigger in Zapier.
3

Get the contact's details when you need them

Events carry data.lead_id. Add Webhooks by Zapier > GET to https://www.usekerux.com/api/v1/leads/ plus the id, with the header Authorization: Bearer YOUR_KERUX_API_KEY (scope leads:read).
Simpler when the Zap needs the contact’s email: in the campaign, a Webhook / HTTP step POSTs the contact’s fields straight to the Catch Hook URL ({{email}}, {{contact.first_name}}…), for example from the follow-up campaign the When the contact replies box sends contacts to.

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3. Answer a waiting contact

A Call & wait step can send the Zap "callback_url": "{{wait.callback_url}}". A Webhooks by Zapier > POST to that URL resumes exactly that contact, and its fields become {{steps.<step>.payload.<field>}}.

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Test with one contact

Run the Zap with Test step and check the person in the campaign. For events, Send test event in Kerux shows up in the Catch Hook’s test.

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Common errors

linkedin_url is missing. Zapier shows Kerux’s answer in the step’s test result.
It’s a premium app: the Zap needs a paid Zapier plan. Make’s HTTP and Webhooks apps or a self-hosted n8n do the same.
Related: Trigger URLs and forms, Webhooks, Make, n8n.