| name | docker |
| description | Use when checking Docker image versions or working with container registries. Skopeo is the required tool for registry queries - never parse Docker Hub web pages. |
Docker Image Version Checking
CRITICAL: Always use skopeo to check Docker image versions - never try to parse Docker Hub web pages or use browser scraping.
Why Skopeo
- Reliable: Direct registry API access, not HTML parsing
- Fast: No JavaScript rendering or page loading
- Comprehensive: Works with all OCI-compliant registries
- Accurate: Gets data directly from registry without intermediaries
List Available Tags
skopeo list-tags docker://library/nginx
skopeo list-tags docker://library/postgres
skopeo list-tags docker://username/image
skopeo list-tags docker://rommapp/romm
skopeo list-tags docker://quay.io/organization/image
skopeo list-tags docker://ghcr.io/owner/repo
skopeo list-tags docker://git.munchohare.com/jmo/image
Inspect Specific Image/Tag
skopeo inspect docker://rommapp/romm:4.3.2
skopeo inspect docker://git.munchohare.com/jmo/audioseek-frontend:0.1.11
skopeo inspect --no-tags docker://nginx:latest
Registry URL Patterns
| Registry | URL Pattern |
|---|
| Docker Hub (official) | docker://library/<image> |
| Docker Hub (user) | docker://<user>/<image> |
| Quay.io | docker://quay.io/<org>/<image> |
| GHCR | docker://ghcr.io/<owner>/<repo> |
| Custom | docker://<registry>/<path> |
Common Use Cases
Find Latest Version
skopeo list-tags docker://rommapp/romm | jq -r '.Tags[]' | sort -V | tail -1
Check If Tag Exists
skopeo inspect docker://nginx:1.25 &>/dev/null && echo "exists" || echo "not found"
Compare Image Digests
skopeo inspect docker://nginx:latest | jq -r '.Digest'
skopeo inspect docker://nginx:1.25.3 | jq -r '.Digest'
Get Image Architecture
skopeo inspect docker://nginx:latest | jq -r '.Architecture'
