CNCF
Providers using this tag (46)
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Strong 1 Solid coverage with minor gaps
Developing 14 Usable, with meaningful gaps to close
Thin 21 Limited public surface area
Emerging 9 Early or largely undocumented
Minimal 1 Almost no public developer surface
APIs with this tag (26)
Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →
Strong 1 Solid coverage with minor gaps
Developing 4 Usable, with meaningful gaps to close
Envoy GatewayEnvoy Gateway's configuration API is a set of Kubernetes Custom Resource Definitions in the gateway.envoypr...Buildpack SpecificationThe Buildpack API (currently 0.12) defines the contract between an individual buildpack and the lifecycle. ...Distribution SpecificationThe Distribution API (currently 0.3) defines how buildpacks, extensions, and builders are packaged as OCI a...Platform SpecificationThe Platform API (currently 0.15) defines how platforms (pack, kpack, Tekton Pipelines, GitLab Auto DevOps,...
Thin 15 Limited public surface area
Envoy AI GatewayEnvoy AI Gateway is an open-source extension to Envoy Proxy and Envoy Gateway, providing a Kubernetes-nativ...Emissary-IngressEmissary-Ingress is an open-source, Kubernetes-native API gateway built on Envoy Proxy and a CNCF incubatin...Argo Workflows APIArgo Workflows is a Kubernetes-native workflow engine for orchestrating parallel jobs. Used extensively in ...Envoy Proxy Admin APIEnvoy is a high-performance, open-source edge and service proxy, and the underlying data plane for Istio, L...Istio Service Mesh APIIstio is the leading open-source service mesh providing traffic management, security (mTLS), and observabil...KEDA (Kubernetes Event-Driven Autoscaling) APIKEDA is a Kubernetes-based event-driven autoscaling component and CNCF graduate project. It provides fine-g...Kubernetes APIThe Kubernetes API is the foundation of the container orchestration ecosystem, providing REST endpoints for...Linkerd APILinkerd is a lightweight, security-first service mesh for Kubernetes. Built on Rust-based micro-proxy (link...Prometheus HTTP APIPrometheus is the de-facto open-source monitoring and alerting toolkit for cloud-native applications and a ...Vineyard Kubernetes OperatorThe Vineyard Kubernetes Operator manages vineyard cluster lifecycle and orchestrates shared objects on Kube...CloudEvents APICloudEvents is a CNCF specification for describing event data in a common way. It defines a core data model...Score SpecificationThe Score Specification (score.yaml) is a declarative, platform-agnostic workload definition format that ca...Runcrunc is a CLI tool for spawning and running containers on Linux according to the OCI (Open Container Initia...CloudEventsCNCF-graduated specification (graduated January 25, 2024) for describing event data in a common way. Define...NATSCNCF incubating high-performance, lightweight messaging system designed for cloud, edge, and IoT. Supports ...
Emerging 6 Early or largely undocumented
gRPC StreaminggRPC defines four RPC styles, three of which are streaming: server streaming, client streaming, and bidirec...NATS JetStreamPersistence layer for the NATS messaging system providing at-least-once and exactly-once streaming, key/val...Open Policy Agent (OPA)Open Policy Agent is a CNCF-graduated open source general-purpose policy engine that enables unified, conte...SPIFFE - Secure Production Identity Framework for EveryoneSPIFFE is a CNCF-graduated open standard for workload identity in dynamic environments. It provides a frame...SPIRE - SPIFFE Runtime EnvironmentSPIRE is the reference implementation of SPIFFE, a CNCF-graduated production-ready toolchain for establishi...gRPC and Protocol BuffersgRPC is a high-performance RPC framework using HTTP/2 and Protocol Buffers (Protobuf) as its IDL and wire f...
Companies reaching this through an API (11)
These companies publish an API, specification or operation carrying “CNCF” but do not classify their business under it. Listed unranked and kept out of the count above, because one tagged operation is not a statement about what a company does.
AI Gateway
Ambassador
API Specifications
Buildpacks Io
Events
Logz.io
Scalability
Scalable Architecture
Scalable Software and Systems
Streaming
Zero Trust Architecture
Score breakdown
Frequency
50.3
log-scaled weighted occurrences
Breadth
1.3
spread across providers
Quality lift
39.8
mean composite of providers using it
Cohesion
13.5
strength of nearest seed neighbor
Related tags
Cloud-Native 23 co-occurrences
Kubernetes 37 co-occurrences
Graduated 7 co-occurrences
OCI 7 co-occurrences
Operator 6 co-occurrences
Distributed Systems 7 co-occurrences
GitOps 5 co-occurrences
Service Mesh 6 co-occurrences
Where this tag comes from
Provider tag46
Api tag26
Cohort brief
Auto-generatedThe 46 providers in the APIs.io catalog tagged CNCF, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.
Providers
46
all scored
Mean Kin Score
35.1
+11.2 vs catalog 23.9
Mean Agent Readiness
17.2
+5.2 vs catalog 12
Spread
10.4–61
median 36 · σ 11
How the 46 split by band
Exemplar 0Strong 1Developing 14Thin 21Emerging 9Minimal 1
Facet averages, against the whole catalog
| Facet | This cohort | Catalog | Difference | Scored |
|---|---|---|---|---|
| Contract Quality | 40.1 | 19.8 | +20.3 | 46 |
| Operational Transparency | 32.8 | 14 | +18.8 | 46 |
| Contract Governance | 19.8 | 6.4 | +13.4 | 46 |
| Developer Ergonomics | 35.6 | 23.4 | +12.2 | 46 |
| Discoverability | 63.4 | 61.2 | +2.2 | 46 |
| Access Clarity | 14.4 | 26.5 | -12.1 | 46 |
A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.
What this cohort publishes
| Artifact | This cohort | Catalog | Difference |
|---|---|---|---|
| MCP server (any) | 4% | 10% | -6 |
| MCP server (first-party) | 2% | 13% | -11 |
| Agent Skills | 0% | 0% | 0 |
| OAuth scopes | 2% | 11% | -9 |
| Security | 93% | 97% | -4 |
| Arazzo workflows | 2% | 2% | 0 |
| Governance rules | 67% | 14% | +53 |
mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.
Top by Kin Score
- 1 Backstage 61
- 2 AgentGateway 54
- 3 Artifact Hub 50.7
- 4 Kubernetes 50.4
- 5 Argo 48.9
- 6 KEDA 48.1
- 7 Cloud Native Buildpacks 47.4
- 8 gRPC 45.7
- 9 Argo Workflows 45.5
- 10 wasmCloud 44.3
Top by Agent Readiness
- 1 Backstage 46.3
- 2 HAMi 33.8
- 3 Scalable Inference Serving 30.6
- 4 KEDA 30
- 5 AgentGateway 29.1
- 6 Kubernetes 28.4
- 7 Artifact Hub 27.2
- 8 CoreDNS 25.8
- 9 Akri 25.8
- 10 BFE 25.8
All 46 members of this roster resolve to a scored provider in
the catalog.Generated from the catalog build of
15 September 2026, across 27661
providers, using the same computation served by the
APIs.io cohort API. Briefs are published for rosters of
5 or more scored providers; below that a distribution is not meaningful.
Work with this as data
Every tag here is available over the APIs.io API and to AI agents over MCP.