Apache EventMesh

Apache EventMesh is a dynamic event-driven application runtime used to decouple the application and backend middleware layer, providing a serverless platform for building distributed event-driven architectures with support for CloudEvents and multiple messaging protocols including HTTP, TCP, and gRPC.

Apache EventMesh publishes 7 APIs on the APIs.io network, including Messaging API, Client API, Event API, and 4 more. Tagged areas include Apache, CloudEvents, Event-Driven, Messaging, and Open Source.

The Apache EventMesh catalog on APIs.io includes 1 event-driven AsyncAPI specification, 1 JSON-LD context, and 3 Spectral governance rulesets.

Apache EventMesh’s developer surface includes documentation, getting-started guide, engineering blog, support, and 7 more developer resources.

🌐 Visit website 📡 Source on GitHub

44.0/100 developing ▼ -8.4 Agent 27/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6

AccessFreemium

7 APIs 7 Features 4 Use Cases

ApacheCloudEventsEvent-DrivenMessagingOpen SourcePub-SubServerless

Kin Score

Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6

Composite quality — 44.0/100 · developing

Contract Quality 15.7 / 25

Developer Ergonomics 5.2 / 20

Commercial Clarity 7.9 / 20

Operational Transparency 4.8 / 13

Governance 7.5 / 12

Discoverability 6.5 / 10

Agent readiness — 27/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

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 6 / 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

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APIs 7

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

Apache EventMesh Messaging API

Event-driven messaging via TCP, HTTP, and gRPC protocols. Events follow the CloudEvents specification. Supports pub-sub, request-reply, and broadcast messaging patterns.

Apache EventMesh Client API

The Client API from Apache EventMesh — 1 operation(s) for client.

Apache EventMesh Event API

The Event API from Apache EventMesh — 2 operation(s) for event.

Apache EventMesh Monitoring API

The Monitoring API from Apache EventMesh — 2 operation(s) for monitoring.

Apache EventMesh Registry API

The Registry API from Apache EventMesh — 1 operation(s) for registry.

Apache EventMesh Subscription API

The Subscription API from Apache EventMesh — 1 operation(s) for subscription.

Apache EventMesh Topic API

The Topic API from Apache EventMesh — 3 operation(s) for topic.

Scroll for all 7

Open Collections 1

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Apache EventMesh Admin API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Apache Event Mesh Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Apache Event Mesh Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Apache Event Mesh Finops

FINOPS

Features 7

Notable capabilities this provider offers.

CloudEvents Support

Native CloudEvents specification support for standardized event envelopes across all messaging protocols.

Multi-Protocol Messaging

Support for HTTP, TCP, and gRPC messaging protocols enabling flexible client connectivity.

Pub-Sub Messaging

Publish-subscribe messaging pattern with topic-based routing for event-driven architectures.

Request-Reply Pattern

Synchronous request-reply messaging over asynchronous infrastructure for RPC-style interactions.

Event Store

Durable event storage with replay capability for reliable event delivery and audit trails.

Workflow Orchestration

Event-driven workflow engine for coordinating distributed business processes and sagas.

Multi-Runtime Support

Pluggable connector model supporting Kafka, RocketMQ, Pulsar, and other messaging backends.

Scroll for all 7

JSON Schema 5

Standalone JSON Schema definitions for this provider's data models.

Examples 4

Example request and response payloads for these APIs.

Use Cases 4

What developers build with this provider.

Microservices Decoupling

Decouple microservices through asynchronous event-driven communication reducing direct service dependencies.

Event Streaming Pipelines

Build scalable event streaming pipelines with durable delivery and replay capabilities.

Distributed Workflows

Orchestrate distributed business processes using event-driven saga and choreography patterns.

IoT Event Ingestion

Ingest and process high-volume IoT device events through standardized CloudEvents format.

Integrations 4

Pre-built integrations with other platforms and tools.

Apache Kafka

Kafka connector for event streaming with durable storage and consumer groups.

Apache RocketMQ

RocketMQ connector for high-throughput message queueing and topic management.

Apache Pulsar

Pulsar connector for multi-tenant event streaming with geo-replication.

Kubernetes

Cloud-native deployment on Kubernetes with operator support for cluster management.

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

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 2

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

GitHubRepository

GitHubRepository

Access & Security 2

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Company 1

The organization behind the API

Blog

Blog

Source (apis.yml)

aid: apache-event-mesh
name: Apache EventMesh
description: Apache EventMesh is a dynamic event-driven application runtime used to decouple the application and backend middleware
  layer, providing a serverless platform for building distributed event-driven architectures with support for CloudEvents
  and multiple messaging protocols including HTTP, TCP, and gRPC.
type: Index
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/apache-event-mesh.png
tags:
- Apache
- CloudEvents
- Event-Driven
- Messaging
- Open Source
- Pub-Sub
- Serverless
url: https://raw.githubusercontent.com/api-evangelist/apache-event-mesh/refs/heads/main/apis.yml
created: '2026-03-26'
modified: '2026-05-19'
specificationVersion: '0.19'
apis:
- aid: apache-event-mesh:eventmesh-messaging-api
  name: Apache EventMesh Messaging API
  description: Event-driven messaging via TCP, HTTP, and gRPC protocols. Events follow the CloudEvents specification. Supports
    pub-sub, request-reply, and broadcast messaging patterns.
  humanURL: https://eventmesh.apache.org/docs/sdk-java/tcp-sdk-usage
  tags:
  - CloudEvents
  - Event-Driven
  - Messaging
  - Pub-Sub
  properties:
  - type: Documentation
    url: https://eventmesh.apache.org/docs/sdk-java/tcp-sdk-usage
  - type: AsyncAPI
    url: asyncapi/eventmesh-messaging.yml
- aid: apache-event-mesh:apache-event-mesh-client-api
  name: Apache EventMesh Client API
  description: The Client API from Apache EventMesh — 1 operation(s) for client.
  humanURL: https://eventmesh.apache.org/docs/instruction/quickstart
  baseURL: http://localhost:10106
  tags:
  - Client
  properties:
  - type: OpenAPI
    url: openapi/apache-event-mesh-client-api-openapi.yml
  - type: Documentation
    url: https://eventmesh.apache.org/docs/introduction
  - type: JSONSchema
    url: json-schema/eventmesh-admin-cloud-event-schema.json
  - type: JSONLD
    url: json-ld/apache-event-mesh-admin-context.jsonld
- aid: apache-event-mesh:apache-event-mesh-event-api
  name: Apache EventMesh Event API
  description: The Event API from Apache EventMesh — 2 operation(s) for event.
  humanURL: https://eventmesh.apache.org/docs/instruction/quickstart
  baseURL: http://localhost:10106
  tags:
  - Event
  properties:
  - type: OpenAPI
    url: openapi/apache-event-mesh-event-api-openapi.yml
  - type: Documentation
    url: https://eventmesh.apache.org/docs/introduction
  - type: JSONSchema
    url: json-schema/eventmesh-admin-cloud-event-schema.json
  - type: JSONLD
    url: json-ld/apache-event-mesh-admin-context.jsonld
- aid: apache-event-mesh:apache-event-mesh-monitoring-api
  name: Apache EventMesh Monitoring API
  description: The Monitoring API from Apache EventMesh — 2 operation(s) for monitoring.
  humanURL: https://eventmesh.apache.org/docs/instruction/quickstart
  baseURL: http://localhost:10106
  tags:
  - Monitoring
  properties:
  - type: OpenAPI
    url: openapi/apache-event-mesh-monitoring-api-openapi.yml
  - type: Documentation
    url: https://eventmesh.apache.org/docs/introduction
  - type: JSONSchema
    url: json-schema/eventmesh-admin-cloud-event-schema.json
  - type: JSONLD
    url: json-ld/apache-event-mesh-admin-context.jsonld
- aid: apache-event-mesh:apache-event-mesh-registry-api
  name: Apache EventMesh Registry API
  description: The Registry API from Apache EventMesh — 1 operation(s) for registry.
  humanURL: https://eventmesh.apache.org/docs/instruction/quickstart
  baseURL: http://localhost:10106
  tags:
  - Registry
  properties:
  - type: OpenAPI
    url: openapi/apache-event-mesh-registry-api-openapi.yml
  - type: Documentation
    url: https://eventmesh.apache.org/docs/introduction
  - type: JSONSchema
    url: json-schema/eventmesh-admin-cloud-event-schema.json
  - type: JSONLD
    url: json-ld/apache-event-mesh-admin-context.jsonld
- aid: apache-event-mesh:apache-event-mesh-subscription-api
  name: Apache EventMesh Subscription API
  description: The Subscription API from Apache EventMesh — 1 operation(s) for subscription.
  humanURL: https://eventmesh.apache.org/docs/instruction/quickstart
  baseURL: http://localhost:10106
  tags:
  - Subscription
  properties:
  - type: OpenAPI
    url: openapi/apache-event-mesh-subscription-api-openapi.yml
  - type: Documentation
    url: https://eventmesh.apache.org/docs/introduction
  - type: JSONSchema
    url: json-schema/eventmesh-admin-cloud-event-schema.json
  - type: JSONLD
    url: json-ld/apache-event-mesh-admin-context.jsonld
- aid: apache-event-mesh:apache-event-mesh-topic-api
  name: Apache EventMesh Topic API
  description: The Topic API from Apache EventMesh — 3 operation(s) for topic.
  humanURL: https://eventmesh.apache.org/docs/instruction/quickstart
  baseURL: http://localhost:10106
  tags:
  - Topic
  properties:
  - type: OpenAPI
    url: openapi/apache-event-mesh-topic-api-openapi.yml
  - type: Documentation
    url: https://eventmesh.apache.org/docs/introduction
  - type: JSONSchema
    url: json-schema/eventmesh-admin-cloud-event-schema.json
  - type: JSONLD
    url: json-ld/apache-event-mesh-admin-context.jsonld
common:
- type: AgenticAccess
  url: agentic-access/apache-event-mesh-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/apache-event-mesh-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/apache-event-mesh-domain-security.yml
- type: Documentation
  url: https://eventmesh.apache.org/docs/introduction
- type: GettingStarted
  url: https://eventmesh.apache.org/docs/instruction/quickstart
- type: GitHubOrganization
  url: https://github.com/apache
- type: GitHubRepository
  url: https://github.com/apache/eventmesh
- type: Blog
  url: https://eventmesh.apache.org/blog
- type: Support
  url: https://eventmesh.apache.org/community
- type: SpectralRules
  url: rules/apache-event-mesh-spectral-rules.yml
- type: Vocabulary
  url: vocabulary/apache-event-mesh-vocabulary.yaml
- type: Features
  data:
  - name: CloudEvents Support
    description: Native CloudEvents specification support for standardized event envelopes across all messaging protocols.
  - name: Multi-Protocol Messaging
    description: Support for HTTP, TCP, and gRPC messaging protocols enabling flexible client connectivity.
  - name: Pub-Sub Messaging
    description: Publish-subscribe messaging pattern with topic-based routing for event-driven architectures.
  - name: Request-Reply Pattern
    description: Synchronous request-reply messaging over asynchronous infrastructure for RPC-style interactions.
  - name: Event Store
    description: Durable event storage with replay capability for reliable event delivery and audit trails.
  - name: Workflow Orchestration
    description: Event-driven workflow engine for coordinating distributed business processes and sagas.
  - name: Multi-Runtime Support
    description: Pluggable connector model supporting Kafka, RocketMQ, Pulsar, and other messaging backends.
- type: UseCases
  data:
  - name: Microservices Decoupling
    description: Decouple microservices through asynchronous event-driven communication reducing direct service dependencies.
  - name: Event Streaming Pipelines
    description: Build scalable event streaming pipelines with durable delivery and replay capabilities.
  - name: Distributed Workflows
    description: Orchestrate distributed business processes using event-driven saga and choreography patterns.
  - name: IoT Event Ingestion
    description: Ingest and process high-volume IoT device events through standardized CloudEvents format.
- type: Integrations
  data:
  - name: Apache Kafka
    description: Kafka connector for event streaming with durable storage and consumer groups.
  - name: Apache RocketMQ
    description: RocketMQ connector for high-throughput message queueing and topic management.
  - name: Apache Pulsar
    description: Pulsar connector for multi-tenant event streaming with geo-replication.
  - name: Kubernetes
    description: Cloud-native deployment on Kubernetes with operator support for cluster management.
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com