Webhook
An HTTP POST request a service sends to a URL you control when an event happens (e.g. "payment succeeded"). The opposite of polling — the service notifies you instead of you asking.
Source
- Stripe Docs — Receive Stripe events in your webhook endpoint
Related terms
MRR (Monthly Recurring Revenue)
The predictable monthly subscription revenue a SaaS earns, normalized so annual plans count as 1/12 per month.
ARR (Annual Recurring Revenue)
Annualised subscription revenue, i.e.
ACV (Annual Contract Value)
The yearly value of a single customer contract, normalized to one year.
Churn
The rate at which customers cancel or downgrade.
Idempotency
Property of an operation that produces the same result no matter how many times it runs.
Exponential Backoff
A retry strategy where each subsequent retry waits exponentially longer than the last (e.g.