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Agentcookie

Agentcookie is a Go-based tool that synchronizes Chrome cookies from a Mac to a separate Linux machine over Tailscale and injects them into Chrome through CDP for compatible browser automation.

Explore the practical guide ↓

Independent OpenViST project profile, based on linked sources.

Agentcookie — OpenViST project profile in Agent Infrastructure.
OpenViST project illustration. See the linked sources for product details.
Understand the project

Practical overview

When it fits

Use it when an agent or browser automation runs on Linux, the human's Chrome session is on a Mac, and both machines can communicate over Tailscale.

Who it is for

  • Developers running browser automation or AI agents on a Linux machine while browsing on a Mac.
  • Operators who want eligible authenticated Chrome sessions available to automation through a connected Chromium instance.

Documented uses

  • Keep eligible Chrome cookies on a Linux agent machine synchronized with changes made in Chrome on a Mac.
  • Let CDP-connected browser automation access cookie-authenticated sites without repeating sign-in on the Linux machine.
Before you choose

Requirements & limits

The documented setup requires Tailscale and Chrome on both machines. The repository specifies an MIT license and provides release archives for macOS arm64 and Linux amd64 and arm64.

  • The Linux Chrome instance must expose a CDP remote-debugging endpoint for live injection.
  • Google and Workspace sessions are excluded unless a human signs in on the receiving machine.
  • Cookie policy configuration controls which domains are synchronized.
  • The README describes encrypted transfer over Tailscale using pairing-derived peer keys and AES-256-GCM.

Check current requirements in the official documentation. Source-based guidance does not mean OpenViST has run or independently tested this project.

Source-based practical guide

Pair a Mac Chrome source with a Linux sink

Set up the documented Mac-to-Linux pairing and configure the Linux sink for live CDP cookie injection.

Before you start

  • Tailscale running on both machines
  • Chrome installed on both machines
  • Linux Chrome started with a remote debugging port, documented as 9223
  • Agentcookie installed on both machines

Steps

  1. On the Mac, run agentcookie wizard install --as source --peer and keep the terminal open to receive the pairing code and URL.

  2. On Linux, create ~/.config/agentcookie/sink.yaml with the sink address, Mac Tailscale hostname, live_cdp enabled and the Chrome debug endpoint; set skip_chrome_sqlite: true as shown in the README.

  3. Create ~/.config/agentcookie/blocklist.yaml with the documented policy configuration for the trusted single-operator sync-all setup.

  4. On Linux, run agentcookie pair --as sink with the Mac hostname and the code and URL printed by the source wizard.

Expected outcome

The paired Linux sink is configured to receive cookie updates and inject them into Chrome through CDP.

Guide limitations

  • The README warns not to use wizard install --as sink for the featured Linux setup because it omits the policy file.
  • Google and Workspace sessions remain logged out unless a human signs in on the Linux machine.
  • The documented sync-all blocklist example is specifically for a trusted single-operator box.
Documentation 1 ↗
Evidence and transparency

Sources & review

Official repository ↗
Source record details
Source availability
Active
Sources checked
13 October 2026
Original website title
mvanhorn/agentcookie · Official homepage title · retained in its source language
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