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Pro plan. Intercom works through a connection and HTTP steps, which are part of Pro and Agency (and the free trial). Anything you already have keeps working on every plan. See Plans and billing.
A contact who replies leaves the campaign (the When the contact replies box). Add Send to another campaign in that box and pick a follow-up campaign. There, a Webhook / HTTP step creates them as a lead in Intercom.
How it connects: Intercom’s REST API with an access token. See Intercom’s Create a contact docs. The request and answer below follow Intercom’s docs.

Before you start

  • An access token: in Intercom, open the Developer Hub, create an app for your workspace and copy its access token.

1. Connect Intercom

In Kerux, open Integrations > Connections, click Connect on Custom API (under Developers):
  • How it signs in: Bearer token, paste the token.
  • Base URL: https://api.intercom.io
Click Save, then Test connection.

2. Create the Intercom lead

In the follow-up campaign, add a Webhook / HTTP step named intercom:
custom_attributes must already exist in Intercom (create linkedin_url as a people data attribute), or leave it out. Intercom answers with the contact (trimmed):
Use role: "user" with your own external_id for customers instead. To avoid a second contact for the same person, search Intercom’s contacts by email first and branch.

Test with one contact

In the follow-up campaign’s Builder, click Test to open Test on one contact and find the contact in Intercom.

Common errors

The token is wrong or belongs to another workspace. Copy it again from the Developer Hub.
A contact with that email already exists. Search first and update it instead.
The attribute doesn’t exist in Intercom. Create it, or remove custom_attributes.
Related: Webhook steps, Slack, Google Chat.