LRN · CAPI STACK/REV. 2026-06
Sheet— 01 / 10 —CAPI
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Server-side conversion events for every platform - after cookies and ATT broke the pixel.

Recover the signalbrowsers lost.

Here is the RGM Conversions API stack - the practitioner guide to server-side event tracking. Meta, Google, TikTok, Snap, LinkedIn, Pinterest and Reddit, with event deduplication and the match quality that decides how many conversions you actually recover. Start with a pillar, explore the periodic table, or filter the index.

0CAPI guides
0Platforms covered
0Methods, mapped
0Topic families

How to read this stack: CAPI is the answer to a broken pixel. Run it alongside the pixel with deduplication, and implement it through server-side GTM feeding GA4 and each ad platform.

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At a glanceQuick answers

The short answers.

What is CAPI?Server-side events

Send conversions from your server, not just a pixel.

Why CAPI?Recover lost signal

Cookies and ATT broke browser tracking.

Double counting?Deduplicate

Shared event ID counts each conversion once.

Match quality?Send hashed PII

More identifiers means more attributed conversions.

Replace the pixel?No - run both

Pixel + server + dedup is the complete setup.

Implement how?Server-side GTM

One container forwards to every platform.

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Load-bearing guidesSheet — 02 / 10

Six guides hold the roof.

Start here. CAPI comes down to a few moves: send server-side, deduplicate, maximize match quality, and orchestrate across platforms. Learn these six and the rest follows.
Start here
  1. F-01CAPI ultimate guideThe full server-side conversions model.
  2. F-02Meta CAPIThe complete Meta implementation.
  3. F-03Google Enhanced ConversionsFirst-party conversion enrichment.
  4. F-04TikTok Events APIServer-side events for TikTok.
  5. F-05Event match qualityThe score that recovers conversions.
  6. F-06Cross-platform orchestrationOne setup, every platform.
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The CAPI indexSheet — 03 / 10

Every method, filed.

Look at the CAPI library by platform. Filter by name or pick a family. The marquee guides are below, and search opens the rest.

Showing 26 of 26 methods

No method matches that filter. Search the full library — it reads every page.

This is the curated index. Search the complete collection or jump to any family above.

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The map of CAPISheet — 04 / 10

The periodic table of CAPI.

Hover or tap a method. Every Conversions API implementation, grouped into six families - foundations, Meta, Google, TikTok & Snap, LinkedIn, and Pinterest & Reddit. Filter by family, or hit ★ Core for the ones that anchor most setups. Each tile links to its guide.
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Why CAPI matters — 2026Sheet — 05 / 10

Why server-side pays.

Tap a card. The browser stopped being a reliable place to measure conversions. Here are the 2026 signals that make the case for CAPI, each sourced and linked to the method and the compendium.
~$10BCAPI is the answer

Meta hit from ATT

Meta guidance; ZenithCAPI guide →
Did you know? ↗
58.5%Borrowed signal fades

US zero-click searches

SparkToro / DatosOrchestration →
Did you know? ↗
69.7%Mobile-first loss

Mobile share of visits

ContentsquareTikTok Events API →
Did you know? ↗
+212%Warehouse the events

MMM adoption YoY

Sellforte / GoogleOffline conversions →
Did you know? ↗
6.1xFirst-party pays

Retail media ROAS

SkaiEnhanced conversions →
Did you know? ↗
56.2%Clean events, high match

GA4 engagement rate

DataboxMatch quality →
Did you know? ↗
The pixel tells you what the browser still allows. The Conversions API tells you what actually happened.
— RGM analysis, 2026

Privacy & measurement signals, 2026 — see the full sourced set in the RGM Benchmarks compendium.

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RGM analytics toolsSheet — 06 / 10

Turn events into decisions.

Use these. RGM ships free calculators for the analysis your recovered events feed - lift, incrementality, efficiency - no signup.
RGM ToolA/B Test Sample Size

Detect a real effect.

 RGM ToolConversion Lift

CVR change to revenue.

 RGM ToolIncrementality Lift

True incremental conversions.

 RGM ToolROAS Calculator

Return on ad spend.

 RGM ToolMER Calculator

Blended efficiency.

 RGM ToolCAC Calculator

Cost to acquire.

 RGM ToolLTV Calculator

Lifetime value.

 RGM ToolBlended CAC

Paid + organic cost.

 RGM ToolAOV Calculator

Average order value.

 RGM ToolChurn Rate

Quantify the leak.

 RGM ToolCPC Calculator

Cost per click.

 RGM ToolCPM Calculator

Cost per thousand.

Browse every calculator on the RGM tools floor, or start with the benchmarks compendium.

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MethodSheet — 07 / 10

How to implement CAPI.

Five steps. A clean CAPI setup recovers conversions for years. Here is the sequence.
  1. Choose the platform APIs. Identify which conversions APIs you need - Meta, Google, TikTok, LinkedIn and others.
  2. Send server-side events. Send events from your server with a shared event ID so they can be matched to the pixel.
  3. Deduplicate against the pixel. Use the event ID to deduplicate server events against browser events.
  4. Maximize match quality. Send hashed first-party identifiers to raise event match quality and recovered conversions.
  5. Orchestrate across platforms. Standardize the schema so one server-side setup feeds every platform.
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Go deeperSheet — 08 / 10

The deep guides.

Beyond setup. Each platform has a full implementation guide - from Meta match quality to Google offline conversions and cross-platform orchestration.
Deep guideMeta CAPI Deep Dive

The complete Meta setup.

 Deep guideEvent Match Quality

Recover more conversions.

 Deep guideGoogle Enhanced Conversions

First-party enrichment.

 Deep guideCross-Platform Orchestration

One setup, every platform.

 Deep guideOffline Conversions

Import CRM conversions.

 Deep guideEvent Deduplication

Count each conversion once.

Pairs with: server-side GTM to deliver it and GA4 to read it. Search the full CAPI library →

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The voices — top 12Sheet — 09 / 10

The voices — top 12.

Follow these. The people who define how marketers measure in a server-side, privacy-first world. Each links to a profile.
01Simo AhavaServer-side & CAPI technical authority 02Avinash KaushikAnalytics outcomes over hits 03Ronny KohaviTrustworthy measurement 04Peter FieldWhat to measure 05Les BinetEconometrics & measurement 06Byron SharpReach metrics 07Rand FishkinAttribution reality 08Sean EllisNorth-star metrics 09Andrew ChenGrowth metrics 10Lenny RachitskyProduct analytics 11Mark RitsonMeasurement rigor 12Neil PatelAnalytics at scale

Browse all marketing thought leaders →

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FAQSheet — 10 / 10

CAPI questions.

What is the Conversions API?

The Conversions API sends conversion events to ad platforms directly from your server, instead of relying only on a browser pixel. It restores signal lost to ad blockers, browser restrictions and Apple's ATT.

Why do I need CAPI?

Browser tracking is degrading - cookies are blocked and ATT cut off most mobile tracking. CAPI sends events server-side so platforms can still attribute and optimize, typically recovering a meaningful share of otherwise-lost conversions.

What is event deduplication?

When you send the same conversion from both the pixel and the server, a shared event ID lets the platform count it once. Deduplication prevents double-counting while the server event fills gaps the pixel misses.

What is event match quality?

Event match quality scores how well a platform can match your server events to a user, based on the identifiers you send. Higher match quality means more attributed conversions and better optimization.

Does CAPI replace the pixel?

No - the best setup runs both. The pixel captures browser context, the Conversions API adds server-side reliability, and deduplication keeps the count correct.

How does CAPI relate to server-side GTM?

Server-side GTM is a common way to implement CAPI - your container receives events and forwards them to each platform's Conversions API from one place.

Sources & provenance

  1. Privacy and measurement signals (ATT revenue impact, zero-click share, mobile share, MMM adoption, retail-media ROAS, engagement) are drawn from the RGM 2026 Benchmarks compendium, which sources each figure to Zenith, SparkToro, Contentsquare, Sellforte/Google, Skai and Databox.
  2. CAPI family groupings and the periodic-table layout are RGM's synthesis; every tile links to its full guide.
  3. Stack census — RGM analysis, June 2026; CAPI guide counts are live totals from the deployed tree.