aid: event-sourcing
name: Event Sourcing
description: >-
  Event sourcing is an architectural pattern where state changes are stored as
  a sequence of immutable events rather than just the current state. Instead of
  storing only the current state of data, event sourcing stores all changes as
  a log of events, enabling complete audit trails, temporal queries, and
  event-driven projections.
type: Index
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
  - Architecture
  - CQRS
  - Distributed Systems
  - Event Sourcing
url: https://martinfowler.com/eaaDev/EventSourcing.html
created: '2025-01-01'
modified: '2026-03-16'
position: Consumer
access: 3rd-Party
specificationVersion: '0.19'
apis: []
common:
  - type: DomainSecurity
    url: security/event-sourcing-domain-security.yml
  - type: Website
    url: https://martinfowler.com/eaaDev/EventSourcing.html
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com