Axon Framework

Axon Framework is a Java framework for building event-driven microservices using CQRS (Command Query Responsibility Segregation) and event sourcing patterns, providing the building blocks to implement scalable and maintainable distributed systems.

Axon Framework publishes 9 APIs on the APIs.io network, including Applications API, Cluster API, Commands API, and 6 more. Tagged areas include CQRS, Event Sourcing, Event-Driven, Java, and Messaging.

The Axon Framework catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

Axon Framework’s developer surface includes documentation, getting-started guide, engineering blog, pricing, and 13 more developer resources.

🌐 Visit website 📡 Source on GitHub

36.4/100 thin ▬ flat Agent 17/100 agent aware open core · Apache-2.0 Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreemium

1 APIs 8 Features 5 Use Cases

CQRS Event Sourcing Event-Driven Java Messaging Microservices

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 36.4/100 · thin

Contract Quality 10.3 / 20

Developer Ergonomics 1.9 / 16

Access Clarity 4.2 / 16

Operational Transparency 3.8 / 10

Contract Governance 2.8 / 10

Discoverability 5.5 / 8

Open Source Surface 5.0 / 10

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 17/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

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 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Open Source Surface applies to this provider. This product is open source and we read its repository directly, so Open Source Surface carries 10 points of the composite. It is scored from what the repository actually publishes — a security policy, a contribution guide, a release history, a code of conduct — read live from the provider rather than inferred from our own catalog pointers. This facet adds; nothing was taken away to make room for it. An open-source project is not excused from the commercial facets, because exemption would strip it of the points it does earn. If we have the wrong repository, or this product is not open source, say so on your provider repo and we will drop the facet rather than have you publish against it.

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 80 points between them, because the conditional facet above carries the other 20. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 80% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/axon-framework: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 9

Individual APIs this provider publishes, each with its own machine-readable definition.

Axon Framework Applications API

The Applications API from Axon Framework — 1 operation(s) for applications.

Axon Framework Cluster API

The Cluster API from Axon Framework — 2 operation(s) for cluster.

Axon Framework Commands API

The Commands API from Axon Framework — 1 operation(s) for commands.

Axon Framework Contexts API

The Contexts API from Axon Framework — 2 operation(s) for contexts.

Axon Framework Event Processors API

The Event Processors API from Axon Framework — 3 operation(s) for event processors.

Axon Framework Events API

The Events API from Axon Framework — 2 operation(s) for events.

Axon Framework Queries API

The Queries API from Axon Framework — 1 operation(s) for queries.

Axon Framework Snapshots API

The Snapshots API from Axon Framework — 1 operation(s) for snapshots.

Axon Framework Users API

The Users API from Axon Framework — 2 operation(s) for users.

OPEN COLLECTION

Scroll for all 11

Pricing Plans 1

Published pricing tiers and plan structures.

Axon Framework Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Axon Framework Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Axon Framework Finops

FINOPS

Features 8

Notable capabilities this provider offers.

CQRS Pattern

Separate command and query models for scalable, maintainable architecture.

Event Sourcing

Store application state as a sequence of events for full audit trail and time-travel debugging.

Domain-Driven Design

First-class support for DDD patterns including aggregates, sagas, and bounded contexts.

Axon Server Integration

Zero-configuration event store and message router with Axon Server.

Distributed Systems Support

Built-in routing for commands, events, and queries across distributed services.

Spring Boot Integration

Seamless Spring Boot auto-configuration for rapid application development.

Testing Support

Built-in testing fixtures for validating aggregate behavior without infrastructure.

Saga Management

Manage long-running business processes with durable saga state.

Scroll for all 8

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Axon Framework Context

10 classes · 0 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

Axon Framework API Rules

5 rules · 3 warnings 2 info

SPECTRAL

Axon Framework API Rules

11 rules · 3 errors 6 warnings 2 info

SPECTRAL

0 properties

JSON STRUCTURE

Scroll for all 10

3 fields

EXAMPLE

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Security Posture 1

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

Axon Framework Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Axon Framework Agentic Access

20 operations · 9 acting

AGENTIC

Use Cases 5

What developers build with this provider.

Microservices Architecture

Build event-driven microservices with reliable message routing.

Audit Trail

Maintain complete audit trails by storing all state changes as events.

Temporal Queries

Reconstruct system state at any point in time from the event store.

Collaborative Domains

Build complex collaborative domains with CQRS separation.

Workflow Automation

Automate multi-step business workflows with event-driven sagas.

Integrations 5

Pre-built integrations with other platforms and tools.

Spring Boot

Auto-configuration and starter dependency for Spring Boot integration.

Apache Kafka

Route events through Kafka as an alternative to Axon Server.

RabbitMQ

Route commands and events through AMQP with RabbitMQ extension.

JPA/Hibernate

Persist saga state and event-sourced entities with JPA.

Micrometer

Expose framework metrics via Micrometer for Prometheus and Grafana.

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

ContributionGuide

ContributionGuide

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

SpectralRules

SpectralRules

Vocabulary

Vocabulary

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubRepository

GitHubRepository

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 3

Status, limits, changes, and where to get help

IssueTracker

IssueTracker

Releases

Releases

StatusPage

StatusPage

Commercial 3

Pricing, plans, and the legal terms of use

License

License

Pricing

Pricing

TermsOfService

TermsOfService

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Source (apis.yml)

aid: axon-framework
name: Axon Framework
description: Axon Framework is a Java framework for building event-driven microservices using CQRS (Command Query Responsibility
  Segregation) and event sourcing patterns, providing the building blocks to implement scalable and maintainable distributed
  systems.
type: Index
deliveryModel:
  model: open-core
  license: Apache-2.0
  open_source: true
  commercial: true
  callable_host: false
  label: Open core · an OSS project plus a commercial hosted product
  confidence: high
  source:
  - license
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/axon-framework.png
tags:
- CQRS
- Event Sourcing
- Event-Driven
- Java
- Messaging
- Microservices
url: https://raw.githubusercontent.com/api-evangelist/axon-framework/refs/heads/main/apis.yml
created: '2026-03-26'
modified: '2026-04-19'
specificationVersion: '0.23'
apis:
- aid: axon-framework:axon-framework-applications-api
  name: Axon Framework Applications API
  description: The Applications API from Axon Framework — 1 operation(s) for applications.
  humanURL: https://www.axoniq.io/products/axon-framework
  baseURL: https://axonserver:8024
  tags:
  - Application
  tags_raw:
  - Applications
  properties:
  - type: OpenAPI
    url: openapi/axon-framework-applications-api-openapi.yml
  - type: APIReference
    url: https://docs.axoniq.io/axon-server/administration/axon-server-api
- aid: axon-framework:axon-framework-cluster-api
  name: Axon Framework Cluster API
  description: The Cluster API from Axon Framework — 2 operation(s) for cluster.
  humanURL: https://www.axoniq.io/products/axon-framework
  baseURL: https://axonserver:8024
  tags:
  - Cluster
  properties:
  - type: OpenAPI
    url: openapi/axon-framework-cluster-api-openapi.yml
  - type: APIReference
    url: https://docs.axoniq.io/axon-server/administration/axon-server-api
- aid: axon-framework:axon-framework-commands-api
  name: Axon Framework Commands API
  description: The Commands API from Axon Framework — 1 operation(s) for commands.
  humanURL: https://www.axoniq.io/products/axon-framework
  baseURL: https://axonserver:8024
  tags:
  - Commands
  properties:
  - type: OpenAPI
    url: openapi/axon-framework-commands-api-openapi.yml
  - type: APIReference
    url: https://docs.axoniq.io/axon-server/administration/axon-server-api
- aid: axon-framework:axon-framework-contexts-api
  name: Axon Framework Contexts API
  description: The Contexts API from Axon Framework — 2 operation(s) for contexts.
  humanURL: https://www.axoniq.io/products/axon-framework
  baseURL: https://axonserver:8024
  tags:
  - Context
  tags_raw:
  - Contexts
  properties:
  - type: OpenAPI
    url: openapi/axon-framework-contexts-api-openapi.yml
  - type: APIReference
    url: https://docs.axoniq.io/axon-server/administration/axon-server-api
- aid: axon-framework:axon-framework-event-processors-api
  name: Axon Framework Event Processors API
  description: The Event Processors API from Axon Framework — 3 operation(s) for event processors.
  humanURL: https://www.axoniq.io/products/axon-framework
  baseURL: https://axonserver:8024
  tags:
  - Event Processors
  properties:
  - type: OpenAPI
    url: openapi/axon-framework-event-processors-api-openapi.yml
  - type: APIReference
    url: https://docs.axoniq.io/axon-server/administration/axon-server-api
- aid: axon-framework:axon-framework-events-api
  name: Axon Framework Events API
  description: The Events API from Axon Framework — 2 operation(s) for events.
  humanURL: https://www.axoniq.io/products/axon-framework
  baseURL: https://axonserver:8024
  tags:
  - Event
  tags_raw:
  - Events
  properties:
  - type: OpenAPI
    url: openapi/axon-framework-events-api-openapi.yml
  - type: APIReference
    url: https://docs.axoniq.io/axon-server/administration/axon-server-api
- aid: axon-framework:axon-framework-queries-api
  name: Axon Framework Queries API
  description: The Queries API from Axon Framework — 1 operation(s) for queries.
  humanURL: https://www.axoniq.io/products/axon-framework
  baseURL: https://axonserver:8024
  tags:
  - Query
  tags_raw:
  - Queries
  properties:
  - type: OpenAPI
    url: openapi/axon-framework-queries-api-openapi.yml
  - type: APIReference
    url: https://docs.axoniq.io/axon-server/administration/axon-server-api
- aid: axon-framework:axon-framework-snapshots-api
  name: Axon Framework Snapshots API
  description: The Snapshots API from Axon Framework — 1 operation(s) for snapshots.
  humanURL: https://www.axoniq.io/products/axon-framework
  baseURL: https://axonserver:8024
  tags:
  - Snapshots
  properties:
  - type: OpenAPI
    url: openapi/axon-framework-snapshots-api-openapi.yml
  - type: APIReference
    url: https://docs.axoniq.io/axon-server/administration/axon-server-api
- aid: axon-framework:axon-framework-users-api
  name: Axon Framework Users API
  description: The Users API from Axon Framework — 2 operation(s) for users.
  humanURL: https://www.axoniq.io/products/axon-framework
  baseURL: https://axonserver:8024
  tags:
  - User
  tags_raw:
  - Users
  properties:
  - type: OpenAPI
    url: openapi/axon-framework-users-api-openapi.yml
  - type: APIReference
    url: https://docs.axoniq.io/axon-server/administration/axon-server-api
common:
- type: IssueTracker
  url: https://github.com/AxonFramework/AxonFramework/issues
- type: Releases
  url: https://github.com/AxonFramework/AxonFramework/releases
- type: ContributionGuide
  url: https://github.com/AxonIQ/AxonFramework/blob/main/CONTRIBUTING.md
- type: License
  name: Apache-2.0
  url: https://github.com/AxonFramework/AxonFramework/blob/main/LICENSE
- type: AgenticAccess
  url: agentic-access/axon-framework-agentic-access.yml
- type: DomainSecurity
  url: security/axon-framework-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/axoniq
- type: Website
  url: https://www.axoniq.io/
- type: Documentation
  url: https://docs.axoniq.io/
- type: GettingStarted
  url: https://docs.axoniq.io/axon-framework/getting-started
- type: GitHubRepository
  url: https://github.com/AxonFramework/AxonFramework
- type: Blog
  url: https://www.axoniq.io/blog
- type: Pricing
  url: https://www.axoniq.io/pricing
- type: TermsOfService
  url: https://www.axoniq.io/terms-and-conditions
- type: StatusPage
  url: https://status.axoniq.io/
- type: SpectralRules
  url: rules/axon-framework-spectral-rules.yml
- type: Vocabulary
  url: vocabulary/axon-framework-vocabulary.yaml
- type: Features
  data:
  - name: CQRS Pattern
    description: Separate command and query models for scalable, maintainable architecture.
  - name: Event Sourcing
    description: Store application state as a sequence of events for full audit trail and time-travel debugging.
  - name: Domain-Driven Design
    description: First-class support for DDD patterns including aggregates, sagas, and bounded contexts.
  - name: Axon Server Integration
    description: Zero-configuration event store and message router with Axon Server.
  - name: Distributed Systems Support
    description: Built-in routing for commands, events, and queries across distributed services.
  - name: Spring Boot Integration
    description: Seamless Spring Boot auto-configuration for rapid application development.
  - name: Testing Support
    description: Built-in testing fixtures for validating aggregate behavior without infrastructure.
  - name: Saga Management
    description: Manage long-running business processes with durable saga state.
- type: UseCases
  data:
  - name: Microservices Architecture
    description: Build event-driven microservices with reliable message routing.
  - name: Audit Trail
    description: Maintain complete audit trails by storing all state changes as events.
  - name: Temporal Queries
    description: Reconstruct system state at any point in time from the event store.
  - name: Collaborative Domains
    description: Build complex collaborative domains with CQRS separation.
  - name: Workflow Automation
    description: Automate multi-step business workflows with event-driven sagas.
- type: Integrations
  data:
  - name: Spring Boot
    description: Auto-configuration and starter dependency for Spring Boot integration.
  - name: Apache Kafka
    description: Route events through Kafka as an alternative to Axon Server.
  - name: RabbitMQ
    description: Route commands and events through AMQP with RabbitMQ extension.
  - name: JPA/Hibernate
    description: Persist saga state and event-sourced entities with JPA.
  - name: Micrometer
    description: Expose framework metrics via Micrometer for Prometheus and Grafana.
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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