Meta

Show Meta which calls turned into customers.

Saylia sends qualified and booked calls to Meta through the Conversions API, marked as phone calls and matched by the caller’s hashed number and the Meta click ID, so your campaigns can optimize for the calls that paid off.

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MetaExample upload

Schedule

Action source
phone_call
Event time
2026-09-29 15:49:40 UTC
Phone (hashed)
a3f1c07e9b5d24…
Click ID (fbc)
fb.1.1790696551000.IwAR2x…
Value
389.00 USD

The caller’s number is hashed with SHA-256 before it’s sent to Meta.

How it works

From the scroll to the phone call.

Most calls a Meta ad causes happen off Meta, where the pixel can’t see them. The Conversions API closes that gap.

  1. 01

    The visit

    When someone arrives from a Meta link, the Saylia tag saves the fbclid to the visit, alongside the UTM tags you already use.

  2. 02

    The call

    They call the tracking number shown to them. The call keeps the visit — and the caller’s number, which Meta can match on its own.

  3. 03

    The event

    When the call qualifies or books, Saylia sends a Conversions API event marked as a phone call, with its value.

Events

Each outcome, its own event.

Calls, qualified calls and bookings each become their own event, so Meta can tell them apart.

How call outcomes map to Meta events
Meta eventSent when
LeadAny call you choose to count as a lead
QualifiedLeadThe call qualified
ScheduleAn appointment was booked

The details

Meta’s rules, followed for you.

  • fbclid saved from the landing page and sent in Meta’s fbc format
  • Caller numbers normalized to digits with country code and hashed with SHA-256
  • Every call event marked with action_source phone_call
  • A value and currency on every event
  • Duplicate events caught before they’re sent
Setup guide

Questions, answered

Can Meta match a call without a click ID?
Often, yes. Saylia sends the caller’s number, hashed with SHA-256, with every event, and Meta matches it against its own users. The fbclid, when the caller arrived from a Meta link, improves the match.
Does an fbclid mean the visitor clicked a paid ad?
No. Meta adds it to organic and paid links alike, so Saylia never treats it as proof of a paid click. To give paid Meta traffic its own tracking numbers, use a number pool matched on your UTM tags or landing pages.
Why are qualified calls a custom event instead of Lead?
If you also send every call as Lead, sending qualified calls as Lead too would count the same person twice. A separate QualifiedLead event keeps them apart. Build a custom conversion on it in Events Manager to optimize for it.
Which event should my campaigns optimize for?
Schedule, if you book enough calls for delivery to learn from. Otherwise start with a custom conversion on QualifiedLead, and move up once volume allows.

Let Meta learn from your phone, too.

See which of your Meta-driven calls booked, and what the Conversions API would have sent for each.

Get startedRead the guides