Apache EventMesh · AsyncAPI Specification

Apache EventMesh Messaging API

Version 1.10.0

Apache EventMesh provides event-driven messaging via multiple protocols including TCP, HTTP, and gRPC. Events follow the CloudEvents specification. EventMesh decouples event producers and consumers, supporting pub-sub, request-reply, and broadcast messaging patterns.

View Spec View on GitHub ApacheCloudEventsEvent-DrivenMessagingOpen SourcePub-SubServerlessAsyncAPIWebhooksEvents

Channels

{topic}

publish publishEvent

Publish a CloudEvent to a topic

EventMesh topic for pub-sub messaging. Events are published to topics and delivered to all subscribed consumer groups.

{topic}/request

publish requestEvent

Send a request event and await reply

EventMesh request-reply channel. A producer sends a request event and awaits a reply event from a consumer.

{topic}/broadcast

publish broadcastEvent

Broadcast a CloudEvent to all consumers

EventMesh broadcast channel. Events are delivered to all connected consumers regardless of consumer group.

Messages

✉

CloudEventMessage

CloudEvent Message

A CloudEvents v1.0 compliant event routed through EventMesh

Servers

tcp

tcp localhost:10000

EventMesh TCP endpoint

grpc

grpc localhost:10205

EventMesh gRPC endpoint