# CloudEvents

**Canonical:** https://apis.io/apis/events/cloudevents/  
**Provider:** Events — https://apis.io/providers/events/  
**Documentation:** https://cloudevents.io

CloudEvents is one of 18 APIs that [Events](https://apis.io/providers/events/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Specification, Envelope, CNCF, and Standards. The published artifact set on APIs.io includes a GitHub repository.

CNCF-graduated specification (graduated January 25, 2024) for describing event data in a common way. Defines a payload envelope with required attributes id, source, specversion, and type, and optional attributes datacontenttype, dataschema, subject, and time. Available format bindings cover JSON, AVRO, and Protobuf (XML and AVRO Compact in working draft); transport bindings cover HTTP, Kafka, AMQP, MQTT, NATS, and WebSockets. The CloudEvents 1.0.2 release is the current stable version, with 1.0.3 in working draft.

## Machine-readable artifacts (12)

- **Portal** — https://cloudevents.io
- **Specification** — https://github.com/cloudevents/spec/blob/main/cloudevents/spec.md
- **GitHubOrganization** — https://github.com/cloudevents
- **GitHubRepository** — https://github.com/cloudevents/spec
- **SDKs** — https://github.com/cloudevents/sdk-go
- **SDKs** — https://github.com/cloudevents/sdk-javascript
- **SDKs** — https://github.com/cloudevents/sdk-python
- **SDKs** — https://github.com/cloudevents/sdk-java
- **SDKs** — https://github.com/cloudevents/sdk-csharp
- **SDKs** — https://github.com/cloudevents/sdk-rust
- **GraphQL** — https://raw.githubusercontent.com/api-evangelist/events/refs/heads/main/graphql/events-graphql.md
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/events/refs/heads/main/apis.yml

## Other Events APIs (12)

- [AsyncAPI](https://apis.io/apis/events/asyncapi/)
- [Apache Kafka](https://apis.io/apis/events/apache-kafka/)
- [Apache Pulsar](https://apis.io/apis/events/apache-pulsar/)
- [NATS](https://apis.io/apis/events/nats/)
- [Redpanda](https://apis.io/apis/events/redpanda/)
- [IBM MQ](https://apis.io/apis/events/ibm-mq/)
- [AWS EventBridge](https://apis.io/apis/events/aws-eventbridge/)
- [Azure Event Grid](https://apis.io/apis/events/azure-event-grid/)
- [Google Cloud Pub/Sub](https://apis.io/apis/events/google-cloud-pubsub/)
- [Confluent Cloud](https://apis.io/apis/events/confluent-cloud/)
- [Confluent Schema Registry](https://apis.io/apis/events/confluent-schema-registry/)
- [Apicurio Registry](https://apis.io/apis/events/apicurio-registry/)

## Tags

Specification, Envelope, CNCF, Standards

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/events/cloudevents/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/events/.