Free
Free
ISC-licensed repository; assistant and hosting/tunnel costs separate.
- Access
- ISC-licensed repository; assistant and hosting/tunnel costs separate.
Junius
● Identity checkedDeveloper Tools · Official-source review 2026-10-07
Junius is a Windows local-execution service that exposes workspace files, processes, background jobs, Git, browser automation and desktop interaction to an MCP-connected assistant. It separates the assistant’s decisions from local execution and includes access to agent skills. The repository documents installation, architecture and the boundaries of its local runtime.
- Category
- Developer Tools
- Free access
- ISC-licensed repository; assistant and hosting/tunnel costs separate.
- API access
- MCP local execution endpoint; Windows-only runtime.
Is Junius right for you?
A good fit for
Choose it for Windows users deliberately connecting an assistant to a controlled local workspace.
Before you choose
Junius is neither an OS sandbox nor a second authorization engine: launched processes inherit the starting user’s permissions. Requires Node.js 20+ and Python 3.10+. Remote exposure must be limited to the documented MCP endpoint, with private diagnostic endpoints kept local.
How to use Junius
Review the official installation and security documents, set up the Windows prerequisites and limit the workspace to intended files. Connect the documented MCP endpoint, test a read-only operation and inspect job/process output. Approve the assistant’s concrete action before allowing changes or remote access.
Local execution boundary
The source is ISC licensed and explicitly rejects non-Windows runtimes. ChatGPT plan or MCP-client compatibility must be confirmed separately; installing the service does not provide model usage. The security documentation requires loopback private endpoints and exposing only /mcp when a tunnel is needed.
Review method
Official vendor material reviewed on 7 October 2026. This listing describes documented workflow and restrictions. No application installation, paid generation, customer-data session or performance benchmark was conducted. Confirm live terms and inspect output for the intended use.
What it can do
Features & capabilities
Unknown is different from unavailable. Each fact carries its own evidence.
| Capability | Value | Evidence | Checked |
|---|---|---|---|
| Documented operating workflow | Review the official installation and security documents, set up the Windows prerequisites and limit the workspace to intended files. Connect the documented MCP endpoint, test a read-only operation and inspect job/process output. Approve the assistant’s concrete action before allowing changes or remote access. | Identity only | 2026-10-07 |
Understand the total cost
Junius pricing & plans
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Explore toolThe practical questions
Frequently asked questions
Does Junius sandbox an assistant’s commands?
No. The README explicitly says it is not an operating-system sandbox and processes run with the permissions of the user who started it. Use a suitable OS account and a deliberately scoped workspace.
Who should choose Junius?
It suits Windows users deliberately connecting an assistant to a controlled local workspace.
What is Junius used for?
Junius is a Windows local-execution service that exposes workspace files, processes, background jobs, Git, browser automation and desktop interaction to an MCP-connected assistant. It separates the assistant’s decisions from local execution and includes access to agent skills. The repository documents installation, architecture and the boundaries of its local runtime.
Does Junius have a free plan?
ISC-licensed repository; assistant and hosting/tunnel costs separate.. This record lists ongoing free access; check the plan limits before starting.
How much does Junius cost?
No paid monthly price is listed; this record treats the product as free to start. See the plan cards for entitlements, billing commitments and seat minimums.
Can I use Junius through an API?
MCP local execution endpoint; Windows-only runtime.. API access and subscription access may have different terms; consult the linked sources.
What should I check before choosing it?
Junius is neither an OS sandbox nor a second authorization engine: launched processes inherit the starting user’s permissions. Requires Node.js 20+ and Python 3.10+. Remote exposure must be limited to the documented MCP endpoint, with private diagnostic endpoints kept local.
Price history
No retained pricing changes yet. A current price alone does not establish a historical trend.
How this profile is supported
Official product page
Reviewed workflow, access and documented restrictions.
Read original source ↗Cost and handoff
The source is ISC licensed and explicitly rejects non-Windows runtimes. ChatGPT plan or MCP-client compatibility must be confirmed separately; installing the service does not provide model usage. The security documentation requires loopback private endpoints and exposing only /mcp when a tunnel is needed.
Read original source ↗Facts apply to the named version and check date. Send a sourced correction if something changed.