Connect conversion data directly with platforms like Meta, TikTok and Reddit to strengthen signals and improve the reliability of campaign measurement and optimisation.

What it is

A CAPI integration is a server-to-server connection between the organisation’s measurement layer (typically server-side GTM or the warehouse) and the receiving platform’s API. Events flow with hashed first-party identifiers - email, phone, customer ID - and are matched, deduplicated against pixel events, and used for bidding.

Why it matters

Platform pixels operate inside the browser, where signal is progressively restricted. CAPI operates server-side, where signal is durable. Meta, TikTok and Reddit now publicly weight CAPI-delivered events higher in their bidding logic. Organisations without CAPI are bidding against a fraction of their own conversion volume.

What Louder does

  • Integration design - source of truth, deduplication strategy, identifier coverage.
  • Implementation - server-side GTM templates, warehouse-driven feeds, queue management.
  • Monitoring - match-rate dashboards, dropped-event alerts, deduplication QA.
  • Consent integration - CAPI sends bounded by the consent the user actually gave.

Common challenges

  • Signal loss as browser restrictions and privacy changes reduce the reliability of pixel-only tracking.
  • Low match rates caused by incomplete or poor-quality first-party customer data.
  • Duplicate conversions when browser and server events aren’t correctly deduplicated.
  • Complex integrations across multiple platforms, each with different API requirements and implementation standards.
  • Ongoing maintenance to monitor event quality, resolve failures and keep pace with platform and privacy changes.

See also: First party data activation | CRM ad platform sync | Warehouse activation and reverse ETL