wasmCloud website screenshot

wasmCloud

wasmCloud is a CNCF incubating platform for building, managing, and scaling distributed applications using WebAssembly components. It provides a runtime that manages the lifecycle of WebAssembly actors and capability providers, enabling developers to write portable business logic that connects to infrastructure capabilities like HTTP servers, messaging, key-value stores, and databases through a declarative linking model based on WebAssembly Interface Types (WIT).

wasmCloud publishes 2 APIs on the APIs.io network: Control Interface API and Application Deployment Manager (wadm) API. Tagged areas include Cloud-Native, CNCF, Distributed Systems, Incubating, and Runtime.

The wasmCloud catalog on APIs.io includes 3 event-driven AsyncAPI specifications, 1 JSON-LD context, and 2 Spectral governance rulesets.

wasmCloud’s developer surface includes documentation, getting-started guide, engineering blog, changelog, and 25 more developer resources.

🌐 Visit website 📡 Source on GitHub
44.3/100 developing ▬ flat Agent 17/100 agent aware self hosted · Apache-2.0 Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0
AccessFreemium
5 APIs
Cloud-NativeCNCFDistributed SystemsIncubatingRuntimeWasmWebAssemblyWIT

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0
Composite quality — 44.3/100 · developing
Contract Quality 14.9 / 23
Developer Ergonomics 6.0 / 18
Access Clarity 2.8 / 18
Operational Transparency 4.3 / 12
Contract Governance 3.1 / 11
Discoverability 7.2 / 9
Open Source Surface 6.0 / 10
Agent readiness — 17/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 0 / 10
Documented Reversibility 0 / 6
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
Delegated User Identity 0 / 6
Protected Resource Metadata 0 / 5
Registration Without a Human 0 / 6
Agentic Commerce Well-Known Document 0 / 5
Open Source Surface applies to this provider. This product is open source and we read its repository directly, so Open Source Surface carries 10 points of the composite. It is scored from what the repository actually publishes — a security policy, a contribution guide, a release history, a code of conduct — read live from the provider rather than inferred from our own catalog pointers. This facet adds; nothing was taken away to make room for it. An open-source project is not excused from the commercial facets, because exemption would strip it of the points it does earn. If we have the wrong repository, or this product is not open source, say so on your provider repo and we will drop the facet rather than have you publish against it.
Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.
The six quality facets above are damped to 90 points between them, because the conditional facet above carries the other 10. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 90% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/wasmcloud: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 5

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

wasmCloud Control Interface API

The wasmCloud control interface provides a NATS-based API for managing the wasmCloud lattice. It supports operations for starting and stopping actors and providers, establishing...

wasmCloud Application Deployment Manager (wadm) API

wadm provides a declarative application deployment API for wasmCloud. Applications are defined as YAML manifests specifying components, capability providers, and their links. wa...

wasmCloud wash CLI

wash (WAsmcloud SHell) is the comprehensive command-line tool for developing, building, deploying, and managing wasmCloud applications and WebAssembly components. It bundles a w...

wasmCloud WIT Interfaces

wasmCloud interfaces are defined using WebAssembly Interface Type (WIT), the open standard interface description language maintained as part of the W3C WebAssembly Component Mod...

wasmCloud Kubernetes Operator

The wasmCloud Kubernetes Operator enables running wasmCloud infrastructure natively on Kubernetes clusters. It deploys wasmCloud hosts as Kubernetes workloads and bridges the Ku...

Pricing Plans 1

Published pricing tiers and plan structures.

Wasmcloud Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Wasmcloud Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Wasmcloud Finops

FINOPS

Event Specifications 3

AsyncAPI definitions for this provider's event-driven and streaming APIs.

wasmCloud Control Interface API

AsyncAPI specification for the wasmCloud Control Interface, a NATS-based API for managing the wasmCloud lattice. Operators and tooling (wash CLI, wasmCloud dashboard, wadm) inte...

ASYNCAPI

wasmCloud Lattice Events

The wasmCloud lattice event system publishes CloudEvents-format messages to NATS subjects describing the lifecycle of components, capability providers, links, and hosts within a...

ASYNCAPI

wasmCloud wadm Application Deployment Manager API

The wasmCloud Application Deployment Manager (wadm) API is exposed entirely as a NATS service using a subject-per-operation model. All API requests and responses are JSON-encode...

ASYNCAPI

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Wasmcloud Context

8 classes · 35 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

wasmCloud API Rules

7 rules · 7 warnings

SPECTRAL

wasmCloud API Rules

6 rules · 5 warnings 1 info

SPECTRAL

JSON Schema 2

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

wasmCloud OAM Application Manifest

4 properties

JSON SCHEMA

wasmCloud OAM Application Manifest

4 properties

JSON SCHEMA

JSON Structure 1

JSON Structure definitions describing this provider's data shapes.

Wasmcloud Oam Manifest Structure

0 properties

JSON STRUCTURE

Examples 3

Example request and response payloads for these APIs.

Wasmcloud Link Definition Example

4 fields

EXAMPLE

Wasmcloud Oam Manifest Example

3 fields

EXAMPLE

Wasmcloud Scale Component Example

4 fields

EXAMPLE

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Wasmcloud Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Kubernetes CRDs 5

Kubernetes Custom Resource Definitions published by this provider.

runtime.wasmcloud.dev artifacts

CRD

runtime.wasmcloud.dev hosts

CRD

runtime.wasmcloud.dev workloaddeployments

CRD

runtime.wasmcloud.dev workloadreplicasets

CRD

runtime.wasmcloud.dev workloads

CRD

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted
GettingStarted

Documentation 6

Reference material describing how the API behaves

Documentation
Documentation
 AsyncAPI
AsyncAPI
 AsyncAPI
AsyncAPI
 AsyncAPI
AsyncAPI
 JSONSchema
JSONSchema
 JSONSchema
JSONSchema

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LlmsText
LlmsText

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

JSONLD
JSONLD
 JSONStructure
JSONStructure
 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

SecurityPolicy
SecurityPolicy
 DomainSecurity
DomainSecurity

Operate 5

Status, limits, changes, and where to get help

IssueTracker
IssueTracker
 Releases
Releases
 Community
Community
 ChangeLog
ChangeLog
 Slack
Slack

Commercial 1

Pricing, plans, and the legal terms of use

License
License

Company 3

The organization behind the API

LinkedIn
LinkedIn
 Website
Website
 Blog
Blog

Other 5

Properties that don't map to a standard resource type

KubernetesCRD
KubernetesCRD
 KubernetesCRD
KubernetesCRD
 KubernetesCRD
KubernetesCRD
 KubernetesCRD
KubernetesCRD
 KubernetesCRD
KubernetesCRD

Source (apis.yml)

apis.yml Raw ↑ 
aid: wasmcloud
name: wasmCloud
description: wasmCloud is a CNCF incubating platform for building, managing, and scaling distributed applications using WebAssembly
  components. It provides a runtime that manages the lifecycle of WebAssembly actors and capability providers, enabling developers
  to write portable business logic that connects to infrastructure capabilities like HTTP servers, messaging, key-value stores,
  and databases through a declarative linking model based on WebAssembly Interface Types (WIT).
url: https://wasmcloud.com
deliveryModel:
  model: self-hosted
  license: Apache-2.0
  open_source: true
  commercial: false
  callable_host: false
  label: Self-hosted open source · you run it yourself
  confidence: high
  source:
  - license
  generated: '2026-08-28'
  method: derived
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/wasmcloud.png
tags:
- Cloud-Native
- CNCF
- Distributed Systems
- Incubating
- Runtime
- Wasm
- WebAssembly
- WIT
tags_raw:
- Cloud Native
- CNCF
- Distributed Systems
- Incubating
- Runtime
- Wasm
- WebAssembly
- WIT
created: '2026-03-16'
modified: '2026-05-03'
specificationVersion: '0.23'
type: Index
apis:
- aid: wasmcloud:wasmcloud-control-api
  name: wasmCloud Control Interface API
  description: The wasmCloud control interface provides a NATS-based API for managing the wasmCloud lattice. It supports operations
    for starting and stopping actors and providers, establishing links between components, querying host inventories, and
    managing application deployments. The wash CLI and wasmCloud dashboard interact with hosts through this interface.
  humanURL: https://wasmcloud.com/docs/hosts/lattice-protocols/control-interface/
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  properties:
  - type: Documentation
    url: https://wasmcloud.com/docs/hosts/lattice-protocols/control-interface/
  - type: Reference
    url: https://wasmcloud.com/docs/concepts/
  - type: AsyncAPI
    url: asyncapi/wasmcloud-control-asyncapi.yml
  - type: AsyncAPI
    url: asyncapi/wasmcloud-lattice-events-asyncapi.yml
  tags:
  - Control API
  - Lattice Management
  - NATS
- aid: wasmcloud:wasmcloud-wadm-api
  name: wasmCloud Application Deployment Manager (wadm) API
  description: wadm provides a declarative application deployment API for wasmCloud. Applications are defined as YAML manifests
    specifying components, capability providers, and their links. wadm manages the desired state of applications across the
    lattice, handling scaling, updates, and self-healing through reconciliation loops using the Open Application Model format.
  humanURL: https://wasmcloud.com/docs/ecosystem/wadm/
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  properties:
  - type: Documentation
    url: https://wasmcloud.com/docs/ecosystem/wadm/
  - type: Reference
    url: https://wasmcloud.com/docs/ecosystem/wadm/api/
  - type: GitHubRepository
    url: https://github.com/wasmCloud/wadm
  - type: JSONSchema
    url: json-schema/wasmcloud-manifest-schema.json
  - type: AsyncAPI
    url: asyncapi/wasmcloud-wadm-asyncapi.yml
  - type: JSONSchema
    url: json-schema/wasmcloud-oam-manifest-schema.json
  tags:
  - Application Management
  - Declarative
  - Deployment
  - OAM
- aid: wasmcloud:wasmcloud-wash-cli
  name: wasmCloud wash CLI
  description: wash (WAsmcloud SHell) is the comprehensive command-line tool for developing, building, deploying, and managing
    wasmCloud applications and WebAssembly components. It bundles a wasmCloud host, NATS server, and wadm for local development,
    and supports publishing components to OCI registries and managing remote lattices.
  humanURL: https://wasmcloud.com/docs/cli/wash/
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  properties:
  - type: Documentation
    url: https://wasmcloud.com/docs/cli/wash/
  - type: GettingStarted
    url: https://wasmcloud.com/docs/getting-started/
  - type: GitHubRepository
    url: https://github.com/wasmCloud/wash
  - type: ChangeLog
    url: https://github.com/wasmCloud/wash/releases
  tags:
  - CLI
  - Developer Tools
  - WebAssembly
- aid: wasmcloud:wasmcloud-interfaces
  name: wasmCloud WIT Interfaces
  description: wasmCloud interfaces are defined using WebAssembly Interface Type (WIT), the open standard interface description
    language maintained as part of the W3C WebAssembly Component Model. wasmCloud supports WASI 0.2 interfaces as well as
    wasmCloud-specific interfaces for capability providers covering HTTP, messaging, key-value, blobstore, and other infrastructure
    concerns.
  humanURL: https://wasmcloud.com/docs/concepts/interfaces/
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  properties:
  - type: Documentation
    url: https://wasmcloud.com/docs/concepts/interfaces/
  - type: Reference
    url: https://wasmcloud.com/docs/reference/wasi/support/
  - type: GitHubRepository
    url: https://github.com/wasmCloud/wasmCloud
  tags:
  - Interfaces
  - WASI
  - WebAssembly
  - WIT
- aid: wasmcloud:wasmcloud-kubernetes-operator
  name: wasmCloud Kubernetes Operator
  description: The wasmCloud Kubernetes Operator enables running wasmCloud infrastructure natively on Kubernetes clusters.
    It deploys wasmCloud hosts as Kubernetes workloads and bridges the Kubernetes control plane with the wasmCloud lattice,
    enabling seamless integration with existing Kubernetes tooling and GitOps workflows. Defines CRDs for Hosts, Artifacts,
    Workloads, WorkloadDeploments, and WorkloadReplicaSets under the runtime.wasmcloud.dev group.
  humanURL: https://wasmcloud.com/docs/deployment/k8s/
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  properties:
  - type: Documentation
    url: https://wasmcloud.com/docs/deployment/k8s/
  - type: GitHubRepository
    url: https://github.com/wasmCloud/wasmcloud-operator
  - type: KubernetesCRD
    url: crd/runtime.wasmcloud.dev_hosts.yaml
  - type: KubernetesCRD
    url: crd/runtime.wasmcloud.dev_artifacts.yaml
  - type: KubernetesCRD
    url: crd/runtime.wasmcloud.dev_workloads.yaml
  - type: KubernetesCRD
    url: crd/runtime.wasmcloud.dev_workloaddeployments.yaml
  - type: KubernetesCRD
    url: crd/runtime.wasmcloud.dev_workloadreplicasets.yaml
  tags:
  - Kubernetes
  - Operator
  - Deployment
common:
- type: IssueTracker
  url: https://github.com/wasmCloud/wadm/issues
- type: Releases
  url: https://github.com/wasmCloud/wadm/releases
- type: SecurityPolicy
  url: https://github.com/wasmCloud/wadm/blob/main/SECURITY.md
- type: License
  name: Apache-2.0
  url: https://github.com/wasmCloud/wadm/blob/main/LICENSE
- type: DomainSecurity
  url: security/wasmcloud-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/wasmcloud
- type: Website
  url: https://wasmcloud.com
- type: Documentation
  url: https://wasmcloud.com/docs/
- type: GettingStarted
  url: https://wasmcloud.com/docs/getting-started/
- type: Blog
  url: https://wasmcloud.com/blog/
- type: Community
  url: https://wasmcloud.com/community/
- type: GitHubOrganization
  url: https://github.com/wasmCloud
- type: GitHubRepository
  url: https://github.com/wasmCloud/wasmCloud
- type: ChangeLog
  url: https://github.com/wasmcloud/wasmcloud/releases
- type: Slack
  url: https://slack.wasmcloud.com/
- type: AsyncAPI
  url: asyncapi/wasmcloud-control-asyncapi.yml
- type: AsyncAPI
  url: asyncapi/wasmcloud-wadm-asyncapi.yml
- type: AsyncAPI
  url: asyncapi/wasmcloud-lattice-events-asyncapi.yml
- type: JSONSchema
  url: json-schema/wasmcloud-manifest-schema.json
- type: JSONSchema
  url: json-schema/wasmcloud-oam-manifest-schema.json
- type: JSONLD
  url: json-ld/wasmcloud-context.jsonld
- type: JSONStructure
  url: json-structure/wasmcloud-oam-manifest-structure.json
- type: Vocabulary
  url: vocabulary/wasmcloud-vocabulary.yml
- type: KubernetesCRD
  url: crd/runtime.wasmcloud.dev_hosts.yaml
- type: KubernetesCRD
  url: crd/runtime.wasmcloud.dev_artifacts.yaml
- type: KubernetesCRD
  url: crd/runtime.wasmcloud.dev_workloads.yaml
- type: KubernetesCRD
  url: crd/runtime.wasmcloud.dev_workloaddeployments.yaml
- type: KubernetesCRD
  url: crd/runtime.wasmcloud.dev_workloadreplicasets.yaml
- type: LlmsText
  url: https://wasmcloud.com/llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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