diff --git a/__tests__/regclient/install.test.itg.ts b/__tests__/regclient/install.test.itg.ts
new file mode 100644
index 0000000..9323186
--- /dev/null
+++ b/__tests__/regclient/install.test.itg.ts
@@ -0,0 +1,38 @@
+/**
+ * Copyright 2025 actions-toolkit authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import {describe, expect, test} from '@jest/globals';
+import * as fs from 'fs';
+
+import {Install} from '../../src/regclient/install';
+
+describe('download', () => {
+  // prettier-ignore
+  test.each(['latest'])(
+    'install regclient %s', async (version) => {
+      await expect((async () => {
+        const install = new Install();
+        const toolPath = await install.download(version);
+        if (!fs.existsSync(toolPath)) {
+          throw new Error('toolPath does not exist');
+        }
+        const binPath = await install.install(toolPath);
+        if (!fs.existsSync(binPath)) {
+          throw new Error('binPath does not exist');
+        }
+      })()).resolves.not.toThrow();
+    }, 60000);
+});
diff --git a/__tests__/regclient/install.test.ts b/__tests__/regclient/install.test.ts
new file mode 100644
index 0000000..d260832
--- /dev/null
+++ b/__tests__/regclient/install.test.ts
@@ -0,0 +1,124 @@
+/**
+ * Copyright 2025 actions-toolkit authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import {describe, expect, it, jest, test, afterEach} from '@jest/globals';
+import fs from 'fs';
+import os from 'os';
+import path from 'path';
+import * as rimraf from 'rimraf';
+import osm = require('os');
+
+import {Install} from '../../src/regclient/install';
+
+const tmpDir = fs.mkdtempSync(path.join(process.env.TEMP || os.tmpdir(), 'regclient-install-'));
+
+afterEach(function () {
+  rimraf.sync(tmpDir);
+});
+
+describe('download', () => {
+  // prettier-ignore
+  test.each([
+    ['v0.8.2'],
+    ['latest']
+  ])(
+  'acquires %p of regclient', async (version) => {
+      const install = new Install();
+      const toolPath = await install.download(version);
+      expect(fs.existsSync(toolPath)).toBe(true);
+      const regclientBin = await install.install(toolPath, tmpDir);
+      expect(fs.existsSync(regclientBin)).toBe(true);
+    },
+    100000
+  );
+
+  // prettier-ignore
+  test.each([
+    // following versions are already cached to htc from previous test cases
+    ['v0.8.2'],
+  ])(
+  'acquires %p of regclient with cache', async (version) => {
+    const install = new Install();
+    const toolPath = await install.download(version);
+    expect(fs.existsSync(toolPath)).toBe(true);
+  });
+
+  // prettier-ignore
+  test.each([
+    ['v0.8.1'],
+  ])(
+  'acquires %p of regclient without cache', async (version) => {
+    const install = new Install();
+    const toolPath = await install.download(version, true);
+    expect(fs.existsSync(toolPath)).toBe(true);
+  });
+
+  // prettier-ignore
+  test.each([
+    ['win32', 'x64'],
+    ['darwin', 'x64'],
+    ['darwin', 'arm64'],
+    ['linux', 'x64'],
+    ['linux', 'arm64'],
+    ['linux', 'ppc64'],
+    ['linux', 's390x'],
+  ])(
+  'acquires regclient for %s/%s', async (os, arch) => {
+      jest.spyOn(osm, 'platform').mockImplementation(() => os as NodeJS.Platform);
+      jest.spyOn(osm, 'arch').mockImplementation(() => arch);
+      const install = new Install();
+      const regclientBin = await install.download('latest');
+      expect(fs.existsSync(regclientBin)).toBe(true);
+    },
+    100000
+  );
+});
+
+describe('getDownloadVersion', () => {
+  it('returns latest download version', async () => {
+    const version = await Install.getDownloadVersion('latest');
+    expect(version.version).toEqual('latest');
+    expect(version.downloadURL).toEqual('https://github.com/regclient/regclient/releases/download/v%s/%s');
+    expect(version.releasesURL).toEqual('https://raw.githubusercontent.com/docker/actions-toolkit/main/.github/regclient-releases.json');
+  });
+  it('returns v0.8.1 download version', async () => {
+    const version = await Install.getDownloadVersion('v0.8.1');
+    expect(version.version).toEqual('v0.8.1');
+    expect(version.downloadURL).toEqual('https://github.com/regclient/regclient/releases/download/v%s/%s');
+    expect(version.releasesURL).toEqual('https://raw.githubusercontent.com/docker/actions-toolkit/main/.github/regclient-releases.json');
+  });
+});
+
+describe('getRelease', () => {
+  it('returns latest GitHub release', async () => {
+    const version = await Install.getDownloadVersion('latest');
+    const release = await Install.getRelease(version);
+    expect(release).not.toBeNull();
+    expect(release?.tag_name).not.toEqual('');
+  });
+  it('returns v0.8.1 GitHub release', async () => {
+    const version = await Install.getDownloadVersion('v0.8.1');
+    const release = await Install.getRelease(version);
+    expect(release).not.toBeNull();
+    expect(release?.id).toEqual(199719231);
+    expect(release?.tag_name).toEqual('v0.8.1');
+    expect(release?.html_url).toEqual('https://github.com/regclient/regclient/releases/tag/v0.8.1');
+  });
+  it('unknown release', async () => {
+    const version = await Install.getDownloadVersion('foo');
+    await expect(Install.getRelease(version)).rejects.toThrow(new Error('Cannot find regclient release foo in https://raw.githubusercontent.com/docker/actions-toolkit/main/.github/regclient-releases.json'));
+  });
+});
diff --git a/__tests__/undock/install.test.ts b/__tests__/undock/install.test.ts
index 7d0984d..3c27e1f 100644
--- a/__tests__/undock/install.test.ts
+++ b/__tests__/undock/install.test.ts
@@ -36,7 +36,7 @@ describe('download', () => {
     ['v0.7.0'],
     ['latest']
   ])(
-  'acquires %p of undock (standalone: %p)', async (version) => {
+  'acquires %p of undock', async (version) => {
       const install = new Install();
       const toolPath = await install.download(version);
       expect(fs.existsSync(toolPath)).toBe(true);
diff --git a/src/regclient/install.ts b/src/regclient/install.ts
new file mode 100644
index 0000000..92b8b10
--- /dev/null
+++ b/src/regclient/install.ts
@@ -0,0 +1,155 @@
+/**
+ * Copyright 2025 actions-toolkit authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import fs from 'fs';
+import os from 'os';
+import path from 'path';
+import * as core from '@actions/core';
+import * as httpm from '@actions/http-client';
+import * as tc from '@actions/tool-cache';
+import * as semver from 'semver';
+import * as util from 'util';
+
+import {Cache} from '../cache';
+import {Context} from '../context';
+
+import {GitHubRelease} from '../types/github';
+import {DownloadVersion} from '../types/regclient/regclient';
+
+export class Install {
+  /*
+   * Download regclient binary from GitHub release
+   * @param v: version semver version or latest
+   * @param ghaNoCache: disable binary caching in GitHub Actions cache backend
+   * @returns path to the regclient binary
+   */
+  public async download(v: string, ghaNoCache?: boolean): Promise<string> {
+    const version: DownloadVersion = await Install.getDownloadVersion(v);
+    core.debug(`Install.download version: ${version.version}`);
+
+    const release: GitHubRelease = await Install.getRelease(version);
+    core.debug(`Install.download release tag name: ${release.tag_name}`);
+
+    const vspec = await this.vspec(release.tag_name);
+    core.debug(`Install.download vspec: ${vspec}`);
+
+    const c = semver.clean(vspec) || '';
+    if (!semver.valid(c)) {
+      throw new Error(`Invalid regclient version "${vspec}".`);
+    }
+
+    const installCache = new Cache({
+      htcName: 'regctl-dl-bin',
+      htcVersion: vspec,
+      baseCacheDir: path.join(os.homedir(), '.bin'),
+      cacheFile: os.platform() == 'win32' ? 'regctl.exe' : 'regctl',
+      ghaNoCache: ghaNoCache
+    });
+
+    const cacheFoundPath = await installCache.find();
+    if (cacheFoundPath) {
+      core.info(`regctl binary found in ${cacheFoundPath}`);
+      return cacheFoundPath;
+    }
+
+    const downloadURL = util.format(version.downloadURL, vspec, this.filename());
+    core.info(`Downloading ${downloadURL}`);
+
+    const htcDownloadPath = await tc.downloadTool(downloadURL);
+    core.debug(`Install.download htcDownloadPath: ${htcDownloadPath}`);
+
+    const cacheSavePath = await installCache.save(htcDownloadPath);
+    core.info(`Cached to ${cacheSavePath}`);
+    return cacheSavePath;
+  }
+
+  public async install(binPath: string, dest?: string): Promise<string> {
+    dest = dest || Context.tmpDir();
+
+    const binDir = path.join(dest, 'regctl-bin');
+    if (!fs.existsSync(binDir)) {
+      fs.mkdirSync(binDir, {recursive: true});
+    }
+    const binName: string = os.platform() == 'win32' ? 'regctl.exe' : 'regctl';
+    const regctlPath: string = path.join(binDir, binName);
+    fs.copyFileSync(binPath, regctlPath);
+
+    core.info('Fixing perms');
+    fs.chmodSync(regctlPath, '0755');
+
+    core.addPath(binDir);
+    core.info('Added regctl to PATH');
+
+    core.info(`Binary path: ${regctlPath}`);
+    return regctlPath;
+  }
+
+  private filename(): string {
+    let arch: string;
+    switch (os.arch()) {
+      case 'x64': {
+        arch = 'amd64';
+        break;
+      }
+      case 'ppc64': {
+        arch = 'ppc64le';
+        break;
+      }
+      case 'arm': {
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        const arm_version = (process.config.variables as any).arm_version;
+        arch = arm_version ? 'armv' + arm_version : 'arm';
+        break;
+      }
+      default: {
+        arch = os.arch();
+        break;
+      }
+    }
+    const platform: string = os.platform() == 'win32' ? 'windows' : os.platform();
+    const ext: string = os.platform() == 'win32' ? '.exe' : '';
+    return util.format('regctl-%s-%s%s', platform, arch, ext);
+  }
+
+  private async vspec(version: string): Promise<string> {
+    const v = version.replace(/^v+|v+$/g, '');
+    core.info(`Use ${v} version spec cache key for ${version}`);
+    return v;
+  }
+
+  public static async getDownloadVersion(v: string): Promise<DownloadVersion> {
+    return {
+      version: v,
+      downloadURL: 'https://github.com/regclient/regclient/releases/download/v%s/%s',
+      releasesURL: 'https://raw.githubusercontent.com/docker/actions-toolkit/main/.github/regclient-releases.json'
+    };
+  }
+
+  public static async getRelease(version: DownloadVersion): Promise<GitHubRelease> {
+    const http: httpm.HttpClient = new httpm.HttpClient('docker-actions-toolkit');
+    const resp: httpm.HttpClientResponse = await http.get(version.releasesURL);
+    const body = await resp.readBody();
+    const statusCode = resp.message.statusCode || 500;
+    if (statusCode >= 400) {
+      throw new Error(`Failed to get regclient releases from ${version.releasesURL} with status code ${statusCode}: ${body}`);
+    }
+    const releases = <Record<string, GitHubRelease>>JSON.parse(body);
+    if (!releases[version.version]) {
+      throw new Error(`Cannot find regclient release ${version.version} in ${version.releasesURL}`);
+    }
+    return releases[version.version];
+  }
+}
diff --git a/src/types/regclient/regclient.ts b/src/types/regclient/regclient.ts
new file mode 100644
index 0000000..f06edeb
--- /dev/null
+++ b/src/types/regclient/regclient.ts
@@ -0,0 +1,21 @@
+/**
+ * Copyright 2025 actions-toolkit authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+export interface DownloadVersion {
+  version: string;
+  downloadURL: string;
+  releasesURL: string;
+}