OpenMarkets
The backbone for prediction markets

Every venue. One model. Read it, price it, trade it.

OpenMarkets aggregates prediction markets, peer-to-peer books, and sweeps into a single normalized model — then lets you read the data, price it, and execute across all of it through one API.

I'm an individual I'm a business

One asset. A few products.

The asset is the unified data. Everything we sell is a product built on top of it.

9+ VENUESTHE ASSETPRODUCTSKalshiPolymarketBettorEdgeProphetX+ 5 moreUnified data modelprediction markets · P2Psweeps — one schemamarkets · odds · liquidity · ticksFlowRead & trade the dataREST · WebSocket · MCPQuotesPrice it with your marginFor businessesConnectTrade for your usersLink accounts · act on behalf
Where do you start?

Are you an individual, or a business?

For individuals

Trade across every venue from one place

  • See the best line, odds & liquidity everywhere at once
  • Practice free with play money — no deposit
  • Build on the data with the Flow API
Explore
For business

Power your product with our data, prices & execution

  • Show prices with your margin baked in (Quotes)
  • Let your users connect accounts & trade on their behalf (Connect)
  • Read everything through one API (Flow)
Explore

The products

Flow
Individuals & business

Read the unified data over REST, WebSocket & MCP — then execute on your own connected accounts.

Read the docs
Quotes
Business only

Configure a strategy and get a single displayable price with your margin baked in, ready for your app.

How Quotes works
Connect
Business only

Onboard your users, let them link their venue accounts through a hosted flow, and trade on their behalf.

Explore Connect