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Linking your Polymarket account

How the Polymarket signer key onboarding works, what we store, and why you cannot lose funds through us.

Last updated July 28, 2026 · Read as markdown

The security model in one paragraph

Polymarket exposes a signer key — a separate credential from your main wallet — that authorises order placement and position reads, but NOT withdrawals. You paste this key into Polyterminus once. We encrypt it at rest with AES-256-GCM, key held in Google Secret Manager. Every order we send to Polymarket is signed with your key on-the-fly. If we vanished tonight, your funds and open positions on Polymarket would be exactly where you left them.

Step-by-step

  1. Open polymarket.com/profile and log in.
  2. Find the API keys / signer section (Polymarket changes location occasionally — search "API" in the settings).
  3. Create a new signer key. Save it somewhere safe.
  4. Return to app.polyterminus.com/app/onboarding.
  5. Paste the key. We show you the wallet address it maps to for confirmation.

What can Polyterminus do with the key?

  • ✅ Place BUY / SELL orders
  • ✅ Cancel orders
  • ✅ Read your positions and balances
  • ❌ Withdraw USDC or move funds off Polymarket
  • ❌ Sign non-order transactions

What we store

  • Your encrypted signer key (AES-256-GCM, key in Secret Manager)
  • Your Polymarket wallet address (public — nothing sensitive)
  • Order history that you generated through Polyterminus (for the ledger)

How to revoke

Rotate or delete the signer key on Polymarket's side. Instantly Polyterminus loses trading access. We also expose a "Disconnect" button in Account → Polymarket that deletes our copy of the encrypted key.