Events

CloudEvents

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.

GitHub

SDKs

📦
GitHubRepository
https://github.com/cloudevents/spec

Other Resources

🔗
Portal
https://cloudevents.io
🔗
Specification
https://github.com/cloudevents/spec/blob/main/cloudevents/spec.md
🔗
GitHubOrganization
https://github.com/cloudevents
🔗
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

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This API 
curl "https://apis.io/api/v1/apis/cloudevents"
All apis 
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

API entry from apis.yml

apis.yml Raw ↑ 
name: CloudEvents
description: 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.
humanURL: https://cloudevents.io
baseURL: ''
tags:
- Specification
- Envelope
- CNCF
- Standards
properties:
- type: Portal
  url: https://cloudevents.io
- type: Specification
  url: https://github.com/cloudevents/spec/blob/main/cloudevents/spec.md
- type: GitHubOrganization
  url: https://github.com/cloudevents
- type: GitHubRepository
  url: https://github.com/cloudevents/spec
- type: SDKs
  url: https://github.com/cloudevents/sdk-go
- type: SDKs
  url: https://github.com/cloudevents/sdk-javascript
- type: SDKs
  url: https://github.com/cloudevents/sdk-python
- type: SDKs
  url: https://github.com/cloudevents/sdk-java
- type: SDKs
  url: https://github.com/cloudevents/sdk-csharp
- type: SDKs
  url: https://github.com/cloudevents/sdk-rust
- url: graphql/events-graphql.md
  type: GraphQL