# CloudEvents

**Canonical:** https://apis.io/providers/cloudevents/  
**Website:** https://cloudevents.io  
**APIs profiled:** 12

CloudEvents is a CNCF graduated specification for describing event data in a common way. It provides a consistent format for event metadata across services, platforms, and systems, enabling interoperability between event producers and consumers. The specification includes protocol bindings for HTTP, AMQP, Kafka, MQTT, and NATS, along with SDKs in multiple languages.

## Kin Score — 38.7 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 38.7).

| Facet | Score |
|---|---|
| Discoverability | 72.2 |
| Contract Quality | 72.8 |
| Governance | 11.4 |
| Contract Governance | 11.4 |
| Operational Transparency | 23.7 |
| Developer Ergonomics | 31.0 |
| Commercial Clarity | 13.2 |
| Access Clarity | 13.2 |

## Agent readiness — 21.8 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | derived |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Free — onboarding: unknown, pricing: free, trial: no (confidence: medium).

## APIs (12)

- **CloudEvents Specification** — The CloudEvents specification defines a set of metadata attributes that must be present in every event, including source, type, id, and specversion. It provides a vendor-neutral...
- **CloudEvents HTTP Protocol Binding** — The HTTP protocol binding defines how CloudEvents are transported using HTTP, including structured content mode where the entire event is in the HTTP body, and binary content mo...
- **CloudEvents Kafka Protocol Binding** — The Kafka protocol binding for CloudEvents defines how events are mapped to Apache Kafka messages. It specifies how CloudEvents attributes are encoded as Kafka message headers a...
- **CloudEvents AMQP Protocol Binding** — The AMQP protocol binding for CloudEvents defines how events are mapped to OASIS AMQP 1.0 messages. In structured content mode, event attributes and data are placed in the AMQP ...
- **CloudEvents MQTT Protocol Binding** — The MQTT protocol binding for CloudEvents defines how events are mapped to MQTT 3.1.1 and MQTT 5.0 messages. It supports both structured and binary content modes for IoT and con...
- **CloudEvents NATS Protocol Binding** — The NATS protocol binding for CloudEvents defines how events are mapped to NATS messages. It enables CloudEvents to be produced and consumed over the NATS messaging system, supp...
- **CloudEvents SQL (CESQL)** — CloudEvents SQL (CESQL) is a v1.0 specification that defines a standardized query language for filtering and routing CloudEvents based on their attributes. It provides a SQL-lik...
- **CloudEvents Go SDK** — The official Go SDK for CloudEvents provides libraries for producing and consuming CloudEvents in Go applications. It supports all CloudEvents protocol bindings and content mode...
- **CloudEvents JavaScript SDK** — The official JavaScript SDK for CloudEvents provides libraries for producing and consuming CloudEvents in Node.js and browser environments. It supports structured and binary con...
- **CloudEvents Java SDK** — The official Java SDK for CloudEvents provides libraries for producing and consuming CloudEvents in Java applications. It includes support for HTTP, Kafka, and other transports,...
- **CloudEvents Python SDK** — The official Python SDK for CloudEvents provides libraries for producing and consuming CloudEvents in Python applications. It supports HTTP transport bindings and both structure...
- **CloudEvents Subscriptions API** — Operations for creating and managing event delivery subscriptions. Each subscription specifies a source of events, optional filter criteria, and a sink where matched events are ...

## Agentic access (1)

- **Cloudevents Agentic Access** — 5 operations · 3 acting

## Security (1)

- **Cloudevents Domain Security** — TLSv1.3 · HSTS

## Plans (1)

- **Cloudevents Plans Pricing**

## Tags

Cloud-Native, Event, Graduated, Interoperability, Messaging, Specification

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/cloudevents/). Scores are computed from the provider's own public artifacts under a published rubric.