Scheduling

LeadLotus + Calendly

Attribute every Calendly booking back to its source.

Calendly's inline embed accepts URL prefill and UTM-style parameters. Install the snippet and tag the embed with data-leadlotus-iframe â€” LeadLotus rewrites the embed URL with attribution data, which Calendly carries through to the event.

Calendly is hosted â€” LeadLotus uses the iframe-rewrite path (data-leadlotus-iframe).

How to set it up

Calendly â€” Pre-populate invitee info

Install the snippet

Add to your site head as usual.

<!-- LeadLotus Attribution Snippet -->
<script async
  src="https://www.leadlotus.com/snippet.js?key=YOUR_API_KEY"
  data-key="YOUR_API_KEY"
  data-endpoint="https://www.leadlotus.com/api/v1/ingest">
</script>

Tag the Calendly embed

Add the data-leadlotus-iframe attribute to your Calendly embed div or iframe. LeadLotus appends UTM-style attribution parameters to the embed URL on page load.

<div
  class="calendly-inline-widget"
  data-leadlotus-iframe
  data-url="https://calendly.com/your-handle/30min">
</div>
<script src="https://assets.calendly.com/assets/external/widget.js" async></script>

Read attribution off the booking

Calendly captures URL parameters as "tracking parameters" on each event. Configure them in Calendly â†’ Account â†’ Tracking Parameters or read them via the Calendly API/webhook. Forward to your CRM via Calendly's native HubSpot, Salesforce, or Zapier integrations.

Attribution fields

LeadLotus writes these hidden field values just before your form submits.

Field name	Example value	Description
`leadlotus-channel`	Organic Search	Top-level channel (Organic Search, Paid Social, Direct, Referral, etc.)
`leadlotus-drilldown1`	Google	Channel-specific source (search engine, social network, or utm_source)
`leadlotus-drilldown2`	spring_launch	utm_campaign on paid traffic, referring host on organic
`leadlotus-drilldown3`	pricing_keyword	utm_term â€” keyword or ad term, when present
`leadlotus-drilldown4`	hero_cta	utm_content â€” ad variant or placement, when present
`leadlotus-landing-url`	/pricing	First landing page of the visitor
`leadlotus-first-visit`	2026-04-24	Date of the first visit (ISO)
`leadlotus-visits`	3	Total sessions before conversion