Event Sourcing

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.

Event Sourcing is profiled on the APIs.io network. Tagged areas include Architecture, CQRS, Distributed Systems, and Event Sourcing.

🌐 Visit website 📡 Source on GitHub

5.5/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

ArchitectureCQRSDistributed SystemsEvent Sourcing

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 5.5/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 0.0 / 20

Commercial Clarity 0.0 / 20

Operational Transparency 0.0 / 13

Governance 0.0 / 12

Discoverability 5.5 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

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Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Event Sourcing Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

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
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/event-sourcing.png
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