dockerhub.tags

stable Advanced

Most recently pushed tags of a Docker Hub repository.

GET /v1/dockerhub/tags

What you get#

A list of Docker Hub results in Onekey's unified shape, in data (an array). An empty array is a normal, successful answer and is charged like any other; a source that reports "nothing found" as an error returns a free 404 not_found instead.

What it costs#

Advanced · 5 credits for a fresh fetch, charged only when it succeeds.
Free when served from cache (0.2 credit for a cached response over 100 KB).
Free if the request is invalid (never charged) or the source fails or reports not found (refunded).

Parameters#

Name	Type	Required	Default	What it is	Constraints
`namespace`	string	yes	(required)	Docker Hub namespace (use library for official images)	max 255 chars; must match `[a-z0-9][a-z0-9_-]{1,254}`; trimmed, lowercased
`repo`	string	yes	(required)	Docker Hub repository	max 255 chars; must match `[a-z0-9][a-z0-9_.-]{0,254}`; trimmed, lowercased

Request#

curl "https://api.onekey.dev/v1/dockerhub/tags?namespace=library&repo=nginx" \
  -H "x-api-key: YOUR_API_KEY"

Try it

Add your key to run this call right here. No key? Get one free. The key stays in this tab.

Recorded response#

A real Docker Hub response, recorded and returned in Onekey's shape. Fields the platform does not provide are null.

json

{
  "success": true,
  "data": [
    {
      "entity": {
        "name": "stable-alpine3.24",
        "updatedAt": "2026-09-26T19:51:57Z",
        "status": "active"
      },
      "ext": {
        "size": 26073522,
        "digest": "sha256:0985e772fb9f729e6fa0980da05fca5d9c468e870eed43071545afa9d2e27d94"
      }
    },
    {
      "entity": {
        "name": "stable-alpine",
        "updatedAt": "2026-09-26T19:51:51Z",
        "status": "active"
      },
      "ext": {
        "size": 26073522,
        "digest": "sha256:0985e772fb9f729e6fa0980da05fca5d9c468e870eed43071545afa9d2e27d94"
      }
    }
  ],
  "metadata": {
    "platform": "dockerhub",
    "endpoint": "tags",
    "cached": false,
    "stale": false,
    "age_s": 0,
    "fetched_at": "2026-01-01T12:00:00+00:00",
    "credits_charged": 5,
    "request_id": "7f3a9c2e5b1d4c8fa2e6d0b9c4f18e37"
  },
  "error": null
}

Field mapping#

How this endpoint's source fields become Onekey's unified schema. Fields the source lacks come back as null.

Source path	Onekey field	Transform
`name`	`entity.name`	-
`last_updated`	`entity.updatedAt`	`toIsoDate`
`full_size`	`ext.size`	`toNumber`
`digest`	`ext.digest`	-
`tag_status`	`entity.status`	-

Caching and freshness#

Fresh for about 2 minutes. Repeat calls in that window are served from cache and are free.
Between 2 minutes and 15 minutes the cached copy is still served instantly and marked stale: true while Onekey refreshes it in the background.
If the source is down when a refresh is needed, the last copy can be served for up to 1 hour more (marked stale).
A "not found" is remembered for 1 minute and is free.
The cache is shared across all customers, which is what keeps repeat calls cheap.

What can go wrong#

Status	Code	What to do
401	`unauthorized`	Check the `x-api-key` header.
402	`insufficient_credits`	Add credits; your balance must cover the price.
404	`not_found`	Unknown endpoint path.
422	`invalid_params`	Fix the parameters using the table above. Free.
429	`rate_limited`	Wait `Retry-After` seconds, then retry.
502	`upstream_error`	The source failed. Refunded; retry with backoff.

See Errors for the full list and retry guidance.

Status: stable (verified against the live source).