Amazon Elastic Container Registry Public
Amazon Elastic Container Registry Public
Amazon ECR Public API is AWS's public container image registry (Docker Hub-like) — public read with controlled push.
Refuge after Docker Hub rate limits
Push still requires AWS account auth
CreateRepository for a public repo. docker login public.ecr.aws then standard docker push. Anonymous users can pull without login.
Uptime · 30-day window
GitHub activity
About this API
ECR Public is AWS's public image registry launched in 2020, driven by Docker Hub's rate-limit tightening (anonymous pull 100/6h, authenticated 200/6h) — disaster for large-scale CI running docker pull. AWS seized the opportunity to launch ECR Public: free, no rate limits, fast and egress-free for AWS-internal pulls. Open-source projects can push images to public.ecr.aws/{namespace}/{image}; anyone can anonymously pull. Many AWS official images also moved to ECR Public (Amazon Linux base images, aws-cli images, etc.). gallery.ecr.aws is the browse UI (Docker Hub-like). Differs from private ECR: private ECR requires IAM auth; ECR Public is fully public to the internet.
What you can build
- 1Open-source projects distributing Docker images (Docker Hub alternative)
- 2AWS customers sharing images with each other
- 3Pull AWS official images from ECR Public (Amazon Linux base images, etc.)
Strengths & limitations
Strengths
- Refuge after Docker Hub rate limits
- AWS users pull via AWS network — faster and avoids egress fees
- gallery.ecr.aws browse UI
Limitations
- Push still requires AWS account auth
- Community ecosystem much smaller than Docker Hub
Example request
curl https://github.com/mermade/aws2openapi/<endpoint>Getting started
CreateRepository for a public repo. docker login public.ecr.aws then standard docker push. Anonymous users can pull without login.
FAQ
Is ECR Public free?+
Yes — AWS uses it as an ecosystem-attraction tool with unlimited free storage and bandwidth (pull).
Technical details
- Auth type
- unknown
- Pricing
- unknown
- Protocols
- REST, OCI
- SDKs
- python, javascript, go, java
- Response time
- 16 ms
- Last health check
- 5/12/2026, 7:36:33 AM
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