Cloud Native Buildpacks (CNBs) transform application source code into OCI-compliant container images that can run on any cloud, without requiring Dockerfiles. Initiated by Pivotal and Heroku in January 2018, CNB joined the CNCF as a Sandbox project in October 2018 and GRADUATED on 11 August 2026, the foundation's highest maturity tier. It is licensed Apache-2.0. CNB is primarily a specification project: three independently versioned contracts — Buildpack API 0.12, Platform API 0.15 and Distribution API 0.3 — plus reference implementations (the pack CLI and the lifecycle). It centralizes container expertise through composable buildpacks, enables layer rebasing for efficient OS updates, and generates Software Bills of Materials in CycloneDX, SPDX and Syft formats. The pack CLI, the kpack Kubernetes operator and the public Buildpack Registry API are the primary integration points.
Cloud Native Buildpacks publishes 1 API on the APIs.io network: kpack. Tagged areas include Build Tools, CI/CD, Cloud-Native, CNCF, and Container Images.
Cloud Native Buildpacks’ developer surface includes documentation, engineering blog, CLI, authentication, changelog, API reference, getting-started guide, and 40 more developer resources.
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 applies to this provider. This API accepts writes, so it
carries 10 points of the composite. It is scored from the published contracts
themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already
holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in
front of it, and the first time that check is skipped a duplicate record is created.
Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet,
not penalised by it.
The six quality facets above are damped to 80 points between them,
because the conditional facet above carries the other
20. That is why each facet's contribution is shown against a damped
maximum: raising a quality facet moves the composite by 80% 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/buildpacks: 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 →
The Buildpack API is the contract between a buildpack and the lifecycle. It defines the detect and build executables, layers, build-plan provisions and requirements, and image e...
The Platform API is the contract between the CNB lifecycle and a platform such as pack, kpack, or a CI runner. It defines how builders, stacks, run images, and inputs are passed...
The Distribution API specifies how buildpacks and builders are packaged as OCI artifacts, signed, and distributed through OCI registries. It also covers how meta-buildpacks comp...
pack is the reference command-line interface for Cloud Native Buildpacks. It implements the Platform API to build OCI images from source on a developer's workstation, manages bu...
The CNB Lifecycle is the reference implementation of the Buildpack and Platform APIs. It runs the detect, analyze, restore, build, export, and rebase phases used by all CNB plat...
kpack is a community Kubernetes-native implementation of Cloud Native Buildpacks. It exposes Image, Builder, ClusterBuilder, and ClusterStack custom resources for declaring cont...
The Cloud Native Buildpacks registry indexes published buildpacks for discovery and reuse. It mirrors metadata for buildpack packages stored in OCI registries and exposes a brow...
The Buildpack API is the contract between a buildpack and the lifecycle. It defines the detect and build executables, layers, build-plan provisions and requirements, and image e...
The Platform API is the contract between the CNB lifecycle and a platform such as pack, kpack, or a CI runner. It defines how builders, stacks, run images, and inputs are passed...
The Distribution API specifies how buildpacks and builders are packaged as OCI artifacts, signed, and distributed through OCI registries. It also covers how meta-buildpacks comp...
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.