Arena
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Arena Live

Arena Live is by application, for up to 10 design partners.

A member already sends live orders to Kalshi and, outside the US, Polymarket International, with their own venue credentials. A live order is sent with your own venue credentials and is real money at the venue, under the venue's rules and terms. Arena is not a broker and never holds your funds.Arena Live is the program for a business that wants live orders on an account in its entity's name. We are looking for up to 10 design partners to help shape it.

ApplyThe sandbox today

Sandbox and live

Sandbox, today
Sandbox fills at live prices, settled against real outcomes. A sandbox order is not sent to any venue.
Live, today
A member sends live orders to Kalshi and, outside the US, Polymarket International, with their own venue credentials. A live order is sent with your own venue credentials and is real money at the venue, under the venue's rules and terms. Arena is not a broker and never holds your funds.
Planned
Live for a business, on an account in the entity's name, with the same ins_ and game_ids on a live order as on a sandbox order. Today a live order names the venue's own market.
Access
Arena Live is by application, for design partners only.

How live would work for a business

Planned for design partners, subject to legal and regulatory review, and may change.
  • You link your own API key from the venue, for an account in your entity's name.
  • Arena sends an order only on your instruction, with your own venue credentials.
  • Fills, fees, funds and settlement stay at the venue.
  • You can turn live off with one switch, and so can Arena.

Venues in scope

  • Kalshi, where a member's live orders go today.
  • Polymarket International, for accounts outside the US. No live orders there for US persons, and Polymarket US is not offered.
  • ProphetX: an account can be connected in Settings. ProphetX orders are switched off.

Who can apply

  • A registered business entity.
  • An existing account at the venue, in the entity's name.
  • A named person responsible for that account.

What Arena will not do

Today and in the design for businesses, Arena will not:
  • Hold customer money or positions. Arena takes no custody.
  • Pool customers' money into a shared bankroll.
  • Match or cross one customer's orders against another's.
  • Trade against customers.
  • Send a live order without the customer's own venue credentials and the customer turning live on.

Apply

For up to 10 design partners. Fields marked * are required. We use what you send to review your application and to contact you about the design-partner program; how long we keep it is in the Privacy Policy.

The registered name of the business.

Country, and state if in the US. For example: US - New York, or United Kingdom.

Does the entity have an account at a venue, in its own name? (required)
Venues you would use (required)

In US dollars, if live were open to you.

What you trade, how you would place orders, and what you need to see first. 0 of 2,000 characters.

Disclosure

Arena is not a broker and never holds your funds. A live order is sent only with your own venue credentials, and the venue's rules and terms apply to it. Nothing on this page is an offer to buy or sell any contract. The design for businesses is subject to legal and regulatory review.