diff --git a/.github/workflows/get-versions.ts b/.github/workflows/get-versions.ts
new file mode 100644
index 0000000..342cad2
--- /dev/null
+++ b/.github/workflows/get-versions.ts
@@ -0,0 +1,83 @@
+/* eslint-disable @typescript-eslint/no-unused-vars */
+import {from, Observable, merge, throwError, of} from 'rxjs'
+import {catchError, map} from 'rxjs/operators'
+import {Octokit} from '@octokit/rest'
+import {RestEndpointMethodTypes} from '@octokit/plugin-rest-endpoint-methods/dist-types/generated/parameters-and-response-types'
+
+export interface RestVersionInfo {
+  id: number
+  version: string
+  created_at: string
+  tagged: boolean
+}
+
+export interface RestQueryInfo {
+  versions: RestVersionInfo[]
+  page: number
+  paginate: boolean
+  totalCount: number
+}
+
+type PackageType =
+  RestEndpointMethodTypes['packages']['getAllPackageVersionsForPackageOwnedByUser']['parameters']['package_type']
+type GetVersionsResponse =
+  RestEndpointMethodTypes['packages']['getAllPackageVersionsForPackageOwnedByUser']['response']['data']
+
+export function getOldestVersions(
+  owner: string,
+  packageName: string,
+  packageType: string,
+  numVersions: number,
+  page: number,
+  token: string
+): Observable<RestQueryInfo> {
+  const octokit = new Octokit({
+    auth: token,
+    baseUrl: process.env.GITHUB_API_URL || 'https://api.github.com'
+  })
+  const package_type: PackageType = packageType as PackageType
+
+  return from(
+    octokit.rest.packages.getAllPackageVersionsForPackageOwnedByUser({
+      package_type,
+      package_name: packageName,
+      username: owner,
+      per_page: numVersions,
+      page
+    })
+  ).pipe(
+    catchError(err => {
+      const msg = 'get versions API failed.'
+      return throwError(
+        err.errors && err.errors.length > 0
+          ? `${msg} ${err.errors[0].message}`
+          : `${msg} ${err.message}`
+      )
+    }),
+    map(response => {
+      const resp = {
+        versions: response.data.map((version: GetVersionsResponse[0]) => {
+          let tagged = false
+          if (
+            package_type === 'container' &&
+            version.metadata &&
+            version.metadata.container
+          ) {
+            tagged = version.metadata.container.tags.length > 0
+          }
+
+          return {
+            id: version.id,
+            version: version.name,
+            created_at: version.created_at,
+            tagged
+          }
+        }),
+        page,
+        paginate: response.data.length === numVersions,
+        totalCount: response.data.length
+      }
+      return resp
+    })
+  )
+}