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Namespace maintains high-performance artifact storage, ideal for workflow artifacts. It is globally distributed, with transparent local caching. Artifact storage offers highly-available, high throughput object storage that is seamlessly integrated with the rest of Namespace. It is the backing technology behind our Bazel cache and Turborepo integration.

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Uploading Artifacts

Artifact creation follows a two-phase commit model:
  1. Call CreateArtifact to obtain a pre-signed upload URL and an upload_id.
  2. Upload the artifact data to the signed URL using an HTTP PUT request.
  3. Call FinalizeArtifact with the upload_id to commit the artifact and make it downloadable.
Artifacts can be versioned — if an artifact with the same path already exists, set create_new_version_if_exists to create a new version rather than failing. To download an artifact, use ResolveArtifact which returns a pre-signed download URL valid for 30 minutes. You can interact with artifacts using the CLI or the ArtifactsService API.

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Fine-grained Access Control

Artifacts are shared with your workspace by default, allowing for frictionless collaboration. Namespace supports fine-grained access controls, allowing you to flexibly restrict or grant image access. Learn more about RBAC support under workspace access controls.

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Expiration Policy

Artifacts can be associated with an expiration date at creation time. Once expired, the artifact is automatically removed and no longer consumes storage. Artifacts can also be manually expired using nsc artifact expire.

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Integrations

The artifact storage is a versatile building block that you can use to store large data close to your workloads. To interact with artifacts manually, you can simply use the CLI. Namespace maintains a selection of native integrations allowing a seamless adoption of artifacts.

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GitHub Actions

Namespace maintains API-compatible variants of actions/upload-artifact and actions/download-artifact. Simply replace your current uses with namespace-actions/upload-artifact and namespace-actions/download-artifact.

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Pull through HTTP caching

You can use the in-network artifact storage for transparent caching of remote HTTP dependencies. Check out nsc artifact cache-url to get started.
Last modified on August 19, 2026