Forwarding Stripe webhooks to TrackLayer + ad platforms

Subscription attribution breaks when the only event you trust is the browser moment before the customer disappears into hosted checkout. Stripe is where the financially meaningful truth is established: whether the payment actually succeeded, whether the invoice was paid, whether the trial converted, whether the plan changed, and whether revenue later reversed through a refund. When TrackLayer ingests those webhook events directly, ad-platform reporting stops depending on page loads, thank-you pages, or client-side scripts that can be blocked, skipped, or delayed.

That matters even more for recurring-revenue businesses than for one-time commerce. A first purchase is only the start of the value story. Platforms should learn which campaigns create durable subscribers, which channels lead to trial conversions, and which audiences generate renewals instead of churn. Stripe webhooks give TrackLayer the state transitions needed to translate billing events into canonical attribution events, then forward them with proper value weighting into Meta, Google, and any other connected destination.

Stripe event names are implementation detail. TrackLayer event names should stay canonical, stable, and destination-neutral. The value of the bridge is that ad destinations do not need to know whether revenue originated from a session checkout, an invoice, or a subscription mutation. They receive the business event that matters, with the right value and customer context attached.

The most useful subscription bridge is not a flat purchase feed. It is a lifecycle model. A new subscription with a free trial can map to trial_started. The first paid invoice can then map to trial_converted. Every later paid invoice can map to subscription_renewed. If the customer cancels, TrackLayer can emit subscription_cancelled. If they later resume, the next paid event can map to reactivated.

That sequence matters because ad platforms treat those states very differently. A trial start is usually a lower-confidence outcome than a paid conversion, so it should often carry lower value or be optimized separately. A renewal is strong evidence of customer quality and can be sent as a value-bearing repeat conversion. A cancellation is not always forwarded as a standard conversion event, but it can trigger suppression, audience exclusions, or negative lifecycle analysis. Reactivation is often one of the highest-signal events for retention campaigns because it proves the channel can recover dormant revenue, not just acquire net-new signups.

trial_started → trial_converted → subscription_renewed
subscription_cancelled → reactivated

Meta:
StartTrial → Subscribe → Purchase → Custom: Reactivated

Google:
begin_trial → subscribe_paid → renewal_value → reactivation_value

Refund handling is where many attribution setups become quietly wrong. If Stripe emits charge.refundedand that event stays trapped inside billing operations, the ad platforms keep credit for revenue that no longer exists. That inflates ROAS, overstates campaign quality, and trains bidding systems on distorted economics. TrackLayer should convert refund events into a negative value adjustment or refund conversion, matched to the original customer and order or subscription identifiers whenever the destination supports it.

In practice this means a customer who paid 499 USD and later received a full refund should not leave a permanent 499 USD positive signal in Meta or Google. The refund event should reduce or reverse that attributed value. Partial refunds should do the same on the refunded amount only. This is especially important for subscription and app businesses with long trial windows, upgrade credits, chargebacks, or support-driven billing reversals. Correct ROAS depends on net revenue, not gross checkout totals.

Metered billing creates a second attribution problem: value does not arrive all at once. The first checkout may establish the customer, but meaningful revenue can accumulate later through API usage, seat expansion, overages, or monthly true-ups. When Stripe posts paid invoices that include metered usage, TrackLayer can attribute that value back to the original acquisition source or to the most recent eligible touch model used in your reporting.

That makes the destination event stream far more honest. Instead of optimizing only for initial signups, platforms can receive additional value-bearing renewal or usage events as the account grows. For products with high expansion revenue, this is often the difference between campaigns that look average at signup time and campaigns that are actually driving the best long-term customers.