connect your broker.
Today, Tellmarket finds the arb. You execute manually on Kalshi.com and Polymarket.com. We’re building the next layer: connect your exchange accounts and one-click execute the full pair from inside Tellmarket.
what this will look like
The arb fires on /arbs. You tap ▸ execute. We submit both legs to your linked Kalshi + Polymarket accounts simultaneously, sized to the depth resting at the best quotes, with the fee math already included. You see the fills land in the same window where the alert fired.
The window between “an arb opens” and “the arb is closed by someone else” is often under a minute. Tabbing between two exchange websites costs you most of it. One click recovers it.
who this is for
- · Pro users already executing manually multiple times per week.
- · Anyone who’s missed a fill because they were too slow switching tabs.
- · Traders who want their position-sizing math done for them (max fillable size at the quoted spread, both legs).
what we’re thinking about hard
- · Custody. Funds stay on Kalshi and Polymarket. We never hold them. That’s also what keeps us out of US brokerage licensing.
- · Authentication. Read-only key for monitoring; trade key only when you’re about to execute. Both stored encrypted, both revocable from your account page.
- · Partial fills. Both legs submit; if one only partially fills, we cancel the other’s unfilled portion immediately and report the actual edge you captured on the filled size.
- · Failure modes. Network blip mid-submission would leave you naked on one side. The order flow is designed around “fail closed”: second leg only fires once we’ve confirmed the first.
join the waitlist
Drop your email and we’ll reach out when early access opens — Pro subscribers first. No marketing emails, just the announcement.