Quickstart

From zero to first approval in 2 minutes.

Install one binary on your laptop, one app on your phone, and you're done. Slack and Discord are optional add-ons.

1

Install the CLI

The CLI is the one binary that hosts the agent loop. Pick whichever works for your machine.

npm install -g offsync
Tip: The offsync CLI is published as @offsync/cli on npm. If you've already installed it via npm, offsync --version should print a v0.x semver.
2

Authenticate

Sign in once. The CLI opens a browser window, drops a token in ~/.offsync/config.json, and you're set.

offsync auth login

Token lives at ~/.offsync/config.json with mode 600.

3

Your first session

From any project directory, ask the agent to do something:

cd ~/code/my-project
offsync new "summarize what this repo does in 3 bullets"

The agent will start streaming output. When it tries to read a file or run a command, the CLI prompts you locally — and any other surfaces (mobile / Slack / Discord) get the same prompt in real time. Whoever taps Approve first wins.

4

Mobile app — approve from the lock screen

The mobile app is a viewer + approval surface. Get push notifications on every tool call; tap Approve / Deny without unlocking the laptop.

Get it on
Google Play
Download on the
App Store

Sign in with the same email; the app reads your sessions list immediately.

Permissions: Push notifications are required for live approvals. The first time you open a session, Android / iOS will ask. Decline and you'll fall back to manual refresh.
5

VSCode extension

Install from the marketplace, hit Cmd+Shift+P → Offsync: Open Panel, paste your token. Your open workspace becomes the agent's working directory.

code --install-extension offcoder.offsync

Diffs land via WorkspaceEdit, so undo / redo / source-control review all work normally.

6

Slack bot — channel-based approvals

In Slack, install the bot from the dashboard. Then in any channel:

/offsync subscribe <your-offsync-user-id>

Every tool call from any of your sessions now posts a Block Kit card to that channel with Approve / Deny buttons. To unsubscribe:

/offsync unsubscribe <your-offsync-user-id>

Find your user id with offsync user me on the CLI.

7

Discord bot — same pattern

Add the bot to your server, then in any channel:

/offsync subscribe user_id:<your-offsync-user-id>

Discord uses native interaction buttons — no gateway connection needed, so the bot scales to any size workspace.

8

BYOK — Bring your own key

Offsync doesn't markup tokens. You bring the key for whichever provider you prefer:

● Anthropic Claude
● OpenAI GPT
● Google Gemini
● xAI Grok
● DeepSeek
● OpenRouter

Add a key from the CLI:

offsync byok add anthropic
# paste your sk-ant-... key when prompted
How it's stored: AES-256-GCM, with the envelope auth-tag bound to your user id. An attacker with both the master key and your encrypted blob still can't replay it onto another account.
9

MCP servers — extend the agent

Pull from the built-in registry of trusted, signed MCP servers — or add your own.

# Browse the registry
offsync mcp list

# Install a server
offsync mcp install filesystem

# Add a custom server (Pro+)
offsync mcp add my-server --transport stdio --command "node my-server.js"

Three transports supported out of the box: stdio (local processes), sse (server-sent events), and http (Streamable HTTP). The registry uses Ed25519 signatures with recursive canonical JSON — tamper-proof down to the leaf field.

Troubleshooting

The CLI can't connect to the relay

Check OFFSYNC_SYNC_URL in your environment. Default is https://api.offsync.offcoder.com. If you're on a corporate network, make sure WebSocket upgrades aren't being stripped by a proxy.

Run offsync doctor to print connectivity + auth diagnostics.

Push notifications aren't arriving on my phone
Open the mobile app and pull-to-refresh the sessions list — that re-registers your Expo push token. Check Settings → Notifications on the device. On Android, make sure battery optimization isn't sleeping the app.
"Plan limit reached" — I'm on Free
Free is 5 sessions per calendar month. Counts reset on the 1st. Upgrade to Pro for unlimited at ₹399/mo.
I want to delete all my data
offsync account delete on the CLI, or Account → Delete on the web dashboard. We do a soft-delete + 30-day hold for accidental deletions, then full purge — see the privacy policy for the full DPDP-aligned retention schedule.

Need a hand?

We hang out in our community Discord, and email is always open.

Join the Discord Email us