Polymarket Bot Deployment: VPS Setup, Key Safety, and Operations (2026)

Deploying a Polymarket bot is an operations problem before it is a trading problem: the code that finds edges matters less than the setup that keeps it running through reconnects, rate limits, and 3 a.m. failures. The production baseline: a VPS with stable connectivity, a proxy key in environment variables (never your main key), process supervision that restarts cleanly, tight clock sync, and a kill switch you have actually tested.

What does the baseline stack look like?

How do I handle keys safely?

The proxy pattern does the heavy lifting:

• Main EOA key: cold storage, never on the server
• Proxy key: the only signing key on the VPS, funded with working collateral
• Rotation path: a second proxy ready to take over if the first is compromised

# /etc/systemd/system/pm-bot.env (root-readable only)
PM_PROXY_KEY=0x...
PM_PROXY_ADDRESS=0x...
PM_CLOB_HOST=https://clob.polymarket.com

Rules: chmod 600 the env file, never log key material, never commit configs, and keep dev and prod on separate proxies so a debugging mistake can’t touch real capital.

What does the systemd unit look like?

[Unit]
Description=Polymarket bot
After=network-online.target

[Service]
EnvironmentFile=/etc/systemd/system/pm-bot.env
WorkingDirectory=/opt/pm-bot
ExecStart=/opt/pm-bot/.venv/bin/python main.py
Restart=always
RestartSec=5

[Install]
WantedBy=multi-user.target

Restart=always with a short delay covers crashes; your code must still handle graceful shutdown (SIGTERM → cancel open orders → flatten or persist state) so a redeploy doesn’t strand orders on the book.

What breaks deployments in practice?

1. Clock drift — signed requests need fresh timestamps; enable NTP sync (systemd-timesyncd or chrony) or face random signature rejections
2. Silent rate-limit death — a 429 loop without backoff burns your bucket; log Poly-RateLimit-Remaining and alert on sustained decline
3. Unhandled reconnect state — after a WebSocket drop, reconcile books and positions before resuming; a bot that trusts pre-crash state doubles positions
4. Momentum-less restarts — the bot forgets its open orders after restart; persist an order ledger locally and reconcile against the API on boot
5. Alert-less silence — the most expensive failure is the quiet one; ping a monitoring endpoint every cycle so absence of signal is itself a signal

What does the kill switch need to do?

One flag — a file, an API endpoint, a Telegram command — that:

1. Cancels all open orders (DELETE /cancel-all)
2. Halts new signal generation
3. Optionally flattens positions (your choice; document it)
4. Leaves the process alive for post-mortem

Test it monthly. A kill switch that has never fired is a hypothesis, not a control.

FAQ

Q: Do I need a VPS, or can I run the bot locally? A: Local works for development; production wants a VPS — uptime, stable IP (your rate-limit identity), and no sleep-mode surprises. Home IPs also change, which resets Cloudflare’s per-IP budgeting.

Q: Which key lives on the server? A: Only the proxy wallet’s key. Your main EOA stays offline; a leaked proxy key risks that account’s collateral, not your identity.

Q: How do I update the bot without stranding orders? A: Graceful shutdown on SIGTERM: cancel resting orders, persist state, exit. systemd restarts the new version, which reconciles against the API before trading.

Q: Should I containerize? A: Optional but recommended — it pins dependencies and makes the systemd unit a one-liner (docker run --restart always). The operational rules (env keys, clock sync, monitoring) are identical either way.

Q: What monitoring is enough? A: At minimum: process liveness (ping/uptime check), error-rate log alerts, and a daily balance reconciliation against the Data API. Any divergence between your ledger and the chain is an incident.

Sources

• docs.polymarket.com — API Reference
• Dev.to — Polymarket trading bot setup

Disclaimer

Not financial advice. Educational purposes only. Updated October 2026.