Buildpacks Io

Buildpack Specification

The Buildpack API (currently 0.12) defines the contract between an individual buildpack and the lifecycle. It specifies the on-disk layout of a buildpack (buildpack.toml, bin/detect, bin/build), the build plan provides/requires graph, layer types (launch/build/cache), launch.toml and build.toml outputs, target declarations (os/arch/distros), SBOM emission, and the CNB_* environment variable contract.

Documentation GitHub

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/buildpack-spec"

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

aid: buildpacks-io:buildpack-spec
name: Buildpack Specification
tags:
- Cloud Native Buildpacks
- Buildpack API
- Specification
- CNCF
humanURL: https://github.com/buildpacks/spec/blob/main/buildpack.md
properties:
- url: https://github.com/buildpacks/spec/blob/main/buildpack.md
  type: Documentation
- url: https://github.com/buildpacks/spec
  type: Repository
- url: json-schema/buildpacks-buildpack-toml-schema.json
  type: JSONSchema
- url: json-schema/buildpacks-build-plan-schema.json
  type: JSONSchema
- url: json-schema/buildpacks-launch-toml-schema.json
  type: JSONSchema
- url: json-structure/buildpacks-io-structure.json
  type: JSONStructure
- url: json-ld/buildpacks-io-context.jsonld
  type: JSONLD
description: The Buildpack API (currently 0.12) defines the contract between an individual buildpack and
  the lifecycle. It specifies the on-disk layout of a buildpack (buildpack.toml, bin/detect, bin/build),
  the build plan provides/requires graph, layer types (launch/build/cache), launch.toml and build.toml
  outputs, target declarations (os/arch/distros), SBOM emission, and the CNB_* environment variable contract.