Docker Hub Image Tracker

Get new or recently updated tags for any public Docker Hub image repository straight from the official Docker Hub API: tag name, digest, architectures, size, and push/pull timestamps.

Built for DevOps teams tracking base-image or dependency updates (new patch versions, new architecture support, unexpected tag churn) without polling Docker Hub's web UI by hand.

Input

{
  "repository": "postgres",
  "daysBack": 7,
  "maxResults": 50
}

Field	Type	Description
repository	string (required)	Docker Hub repository to check, e.g. "postgres" or "node" for an official image, or "bitnami/postgresql" for a namespaced one. No namespace assumes "library/" (official images).
daysBack	number	Only return tags updated within this many days. Default 7, max 365.
maxResults	number	Max tags to return. Default 50, max 100.

Output

One record per matching tag:

{
  "repository": "library/postgres",
  "tag": "14.24-alpine3.23",
  "digest": "sha256:cb5f94ef6a4b3da2ff52083f974c2d6308fbb665b81dd385f5ad7b391c5e48ac",
  "fullSizeBytes": 114143384,
  "contentType": "image",
  "tagStatus": "active",
  "lastUpdated": "2026-08-16T16:07:26.031693Z",
  "lastPushed": "2026-08-16T16:07:26.031693Z",
  "lastPulled": "2026-08-17T19:22:39.752395292Z",
  "lastUpdaterUsername": "doijanky",
  "architectures": ["amd64", "arm64", "arm", "386", "ppc64le", "s390x"],
  "dockerHubUrl": "https://hub.docker.com/r/library/postgres/tags?name=14.24-alpine3.23"
}

An unknown repository name returns a clear error rather than an empty result, so a typo isn't silently mistaken for "no updates."

How it works

Direct calls to the official Docker Hub API (the same API Docker Hub's own website uses) — no proxy, no key, no scraping. Public registry metadata for any public repository.

Pricing note

Billed per search (one repository check), not per tag returned — one charge whether the search returns 0 tags or 100.

Related products

• npm Package Tracker — release/deprecation events for npm packages
• PyPI Download Stats Tracker — download-trend counterpart for PyPI packages