Apptainer logo

Apptainer

Apptainer, formerly Singularity, is a Linux Foundation project providing a high-performance container runtime optimized for high-performance computing and scientific workloads. It enables reproducible, portable scientific computing with support for existing Docker/OCI containers and integration with HPC schedulers.

1 APIs 2 Capabilities 0 Features 44.4 / 100 thin
ContainersHPCScientific ComputingOpen SourceLinux Foundation

API Rating

44.4/ 100
thin
Scored 2026-05-20 · rubric v0.3
Discoverability80.0
Contract Quality75.2
Governance26.3
Operational Transparency36.8
Developer Ergonomics8.7
Commercial Clarity39.5

APIs

Apptainer API

API for the Apptainer container runtime, providing programmatic management of HPC container images and instances optimized for scientific computing workloads.

Capabilities

Apptainer Container Runtime API — Images

Apptainer Container Runtime API — Images. 3 operations. Lead operation: Apptainer - List Images. Self-contained Naftiko capability covering one Apptainer business surface.

Run with Naftiko

Apptainer Container Runtime API — Instances

Apptainer Container Runtime API — Instances. 2 operations. Lead operation: Apptainer - List Instances. Self-contained Naftiko capability covering one Apptainer business surface.

Run with Naftiko

Semantic Vocabularies

Apptainer Context

12 classes · 0 properties

JSON-LD

API Governance Rules

Apptainer API Rules

17 rules · 8 errors 9 warnings

SPECTRAL

Resources

🔗
Documentation
Documentation
👥
GitHubOrg
GitHubOrg

Sources

Raw ↑ 
aid: apptainer
name: Apptainer
description: Apptainer, formerly Singularity, is a Linux Foundation project providing a high-performance container runtime
  optimized for high-performance computing and scientific workloads. It enables reproducible, portable scientific computing
  with support for existing Docker/OCI containers and integration with HPC schedulers.
type: Index
position: Consumer
access: 3rd-Party
image: https://kinlane-productions2.s3.amazonaws.com/apis-json/apis-json-logo.jpg
tags:
- Containers
- HPC
- Scientific Computing
- Open Source
- Linux Foundation
created: '2026-03-16'
modified: '2026-05-19'
url: https://raw.githubusercontent.com/api-evangelist/apptainer/refs/heads/main/apis.yml
specificationVersion: '0.19'
apis:
- aid: apptainer:apptainer-api
  name: Apptainer API
  tags:
  - Containers
  - HPC
  - Scientific Computing
  - SIF
  humanURL: https://apptainer.org/docs/
  properties:
  - url: https://apptainer.org/docs/
    type: Documentation
  - url: https://github.com/apptainer/apptainer
    type: GitHubRepository
  - url: openapi/apptainer-openapi.yaml
    type: OpenAPI
  - url: json-schema/container-image-schema.json
    type: JSONSchema
  - url: json-structure/container-image-structure.json
    type: JSONStructure
  - url: examples/container-image-example.json
    type: Example
  - url: json-ld/apptainer-context.jsonld
    type: JSONLD
  - url: rules/apptainer-spectral-rules.yml
    type: SpectralRules
  - url: vocabulary/apptainer-vocabulary.yaml
    type: Vocabulary
  - type: NaftikoCapability
    url: capabilities/apptainer-images.yaml
  - type: NaftikoCapability
    url: capabilities/apptainer-instances.yaml
  description: API for the Apptainer container runtime, providing programmatic management of HPC container images and instances
    optimized for scientific computing workloads.
common:
- type: Documentation
  name: Apptainer Documentation
  description: Official documentation for Apptainer.
  url: https://apptainer.org/docs/
- type: GitHubOrg
  name: Apptainer GitHub
  description: Source code and repositories for Apptainer.
  url: https://github.com/apptainer
maintainers:
- FN: Kin Lane
  email: [email protected]