mpai: Pricing, Features & Best Use Cases

Our take: mpai is worth trying for pairs of macOS developers who already use Codex or Claude Code and want a teammate to join a live session with their own name on each prompt.

Main limitation: It is a public alpha that is macOS-only and requires Tailscale.

By the AI Tool Atlas editors. Based on the vendor's official documentation; we have not tested this product hands-on. What “documented overview” means

Who should use mpai

mpai is worth trying for pairs of macOS developers who already use Codex or Claude Code and want a teammate to join a live session with their own name on each prompt. Based on the vendor's documentation, not on a hands-on test.

Best for: Small dev teams using Codex or Claude Code

Also a good fit for

Cofounders sharing AI coding sessions

Consider another tool if labeled public alpha (version 0.4.19 at time of check)

Or if

Site lists macOS only, with Tailscale required
Requires Node.js 20+ for guests and Homebrew or Node.js on the host

mpai pricing and usage limits

Prices checked Oct 2, 2026 on the official US pricing page. Prices and limits change often.

Free access and trial conditions

The site's structured data lists price $0 as open source.

Not applicable.

Paid plans: what changes as you upgrade

Open source web

Free source (opens in a new tab)

Month

For: Teams pairing on AI sessions

Limits

Public alpha

Includes

Session invites
Named prompts

Usage caps, credits and extra costs

Codex and/or Claude Code access and Tailscale required.

Not stated.

What is mpai, and how does it work?

mpai is an open-source command-line tool (public alpha) that lets a named teammate enter an existing Codex or Claude Code conversation from their own terminal, instead of screen sharing or pasting transcripts. The host chooses which session to share and creates an invite scoped to that session. The site describes a private setup over Tailscale with no public relay, installed via Homebrew or npm on the host. A guest needs Node.js 20+ and pastes a printed command. Prompts from the guest are attributed to them in the native transcript.

mpai's official site: how the product presents itself. godfaddaai.github.io, captured Oct 2, 2026

What you provide and what you get back

You provide

Existing Codex or Claude Code session
Invite command

You get back

Shared attributed prompts in the session transcript

Where you can use it

Platforms: macos, cli
Account: Not required

Best use cases for mpai

Scenarios are worked out by our editors from the documentation; the actual result depends on your input and plan.

Pairing with a teammate inside an in-progress AI coding session

Who: Pair developers
You provide: Live AI session
Expected result: Teammate joins and prompts
Plan needed: Free
Limitation: macOS and Tailscale only source (opens in a new tab)

Handing off a Claude Code or Codex session without re-explaining context

Who: Teams handing off work
You provide: Running session
Expected result: Handoff without re-explaining
Plan needed: Free
Limitation: Alpha source (opens in a new tab)

Reviewing a live AI session transcript from another machine

Who: Reviewers
You provide: Session transcript
Expected result: Live view elsewhere
Plan needed: Free
Limitation: Host must share the session source (opens in a new tab)

mpai features and their limits

Feature overview on the official site. godfaddaai.github.io, captured Oct 2, 2026

Join an existing Codex or Claude Code session from the terminal

Lets a teammate enter a Codex or Claude Code session from their own terminal. Avoids screen sharing.

Access: Host installLimit: Alpha source (opens in a new tab)

Per-session invites limited to one chosen session

Creates an invite for the one session the host picks. Limits exposure.

Access: HostLimit: One session per invite source (opens in a new tab)

Prompts attributed to the named teammate

Tags the guest's prompts with their name in the transcript. Shows who asked what.

Access: GuestLimit: Needs names set source (opens in a new tab)

Private connection over Tailscale, no public relay

Connects over Tailscale with no public relay. Keeps traffic private.

Access: Both sidesLimit: Requires Tailscale source (opens in a new tab)

mpai pros and cons

Reasons to choose mpai

Open source under the MIT license, per the site's structured data No cost shown documented source (opens in a new tab)
Offers a $0 price per the site's structured data You can reuse tools documented source (opens in a new tab)
Works with the Codex or Claude Code sessions teams already use Less risk of leaking other chats documented source (opens in a new tab)
Invites are scoped to a single chosen session You keep control documented source (opens in a new tab)

Check before paying for mpai

Labeled public alpha (version 0.4.19 at time of check) Bugs possible documented source (opens in a new tab)
Site lists macOS only, with Tailscale required Non-Mac teammates cannot join documented source (opens in a new tab)
Requires Node.js 20+ for guests and Homebrew or Node.js on the host Extra installs needed documented source (opens in a new tab)
Needs Codex and/or Claude Code already in use Requires existing AI tools documented source (opens in a new tab)

How to use mpai for sharing an AI coding session with a teammate

Set up mpai

Install mpai on the host with Homebrew or npm.
Run mpai start and enter both names.
Pick the session to share.

Example: sharing an AI coding session with a teammate

Copy the printed guest command.
Teammate pastes it with Node.js 20+.
Teammate sends a prompt.

Review and export the result

Verify the prompt shows the teammate's name.
Confirm only the chosen session is visible.

mpai API

API access and separate billing

mpai has no public API in its official documentation. No API described.

Privacy, data use and commercial rights

Summarized from the vendor's current policies; this is not legal advice and a vendor's badge is not an independent audit.

How your inputs and outputs are handled

Traffic stays on a private Tailscale network with no public relay.

Best mpai alternatives for different needs

"Better suited" is based on documented features and pricing, not on a head-to-head test.

GitHub Copilot: better suited to

Cursor: better suited to

Devin Desktop (formerly Windsurf): better suited to

Alternatives
Alternative	Pricing	Limitation
GitHub Copilot	—	—	Compare
Cursor	—	—	Compare
Devin Desktop (formerly Windsurf)	—	—	Compare

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mpai FAQ

What does mpai do?

It lets a named teammate join an existing Codex or Claude Code session from their terminal. source (opens in a new tab)

What does mpai require?

macOS, Tailscale, Homebrew or Node.js 20+ on the host and Node.js 20+ for the guest. source (opens in a new tab)

Is mpai open source?

Yes, the site describes it as open source, with MIT listed in its structured data. source (opens in a new tab)

How are guest prompts shown in mpai?

Each guest prompt is attributed to the teammate's name in the session transcript. source (opens in a new tab)

Sources and review methodology

Official sources and verification dates

mpai — AI coding is multiplayer now homepage · checked Oct 2, 2026
GitHub - godfaddaai/multiplayer-ai homepage · checked Oct 2, 2026

Not verified: Linux or Windows support; Privacy policy; Roadmap beyond alpha.

How we documented and maintain this page

Every fact about mpai above comes from the 2 official pages listed here, last compared on Oct 2, 2026; we have not run mpai ourselves, so it has no editorial score. How we check and re-check pages.

Article updated Oct 10, 2026; prices checked Oct 2, 2026. Outbound links to vendors are plain links; we do not earn commissions. How we review · Report an error