Markets

Market identifiers

Every market is uniquely identified by a platform and market_id pair.

Platform	ID format	Example
Kalshi	Ticker string	`KXFED-26MAR19`
Polymarket	Numeric condition ID	`0x1234...abcd`
Robinhood	Event slug	`fed-rate-cut-march-2026`

All endpoints that reference a specific market use the pattern:

/v1/markets/{platform}/{market_id}

The Market object

{
  "platform": "kalshi",
  "market_id": "KXFED-26MAR19",
  "title": "Will the Fed cut rates at the March 2026 meeting?",
  "url": "https://kalshi.com/markets/kxfed-26mar19",
  "category": "economics",
  "yes_price": 0.62,
  "volume_24h": 48250.00,
  "liquidity": 125000.00,
  "open_interest": 340000.00,
  "resolution_date": "2026-03-19T18:00:00Z",
  "updated_at": "2026-03-24T14:30:00Z"
}

Price interpretation

The yes_price field represents the market’s implied probability that the event will occur:

0.62 means the market prices the event at 62% likely
Prices range from 0.0 (won’t happen) to 1.0 (certain)
The difference between Rekko’s estimated probability and the market price is the edge

Market lifecycle

Markets move through these stages:

Status	Meaning
`active`	Trading is open
`closed`	Trading has ended, awaiting determination
`determined`	Outcome is known, settlement pending
`finalized`	Fully settled and paid out

Use the Resolution Intelligence endpoint for detailed resolution timing, time decay estimates, and key upcoming dates.

Platforms

Rekko covers three prediction market platforms: Kalshi — US-regulated exchange (CFTC-regulated). Markets use ticker-style IDs (e.g., KXBTC-26MAR14-100000). Higher regulatory certainty, tighter spreads on popular markets. Polymarket — Crypto-native exchange on Polygon. Markets use condition IDs. Higher volume on political and crypto markets, wider variety of events. Robinhood — Prediction markets integrated into the Robinhood brokerage app. Markets use event slugs. Growing retail audience with seamless access from the existing Robinhood user base.

Listing markets

# List all markets (both platforms)
curl https://api.rekko.ai/v1/markets \
  -H "Authorization: Bearer YOUR_API_KEY"

# Filter by platform
curl "https://api.rekko.ai/v1/markets?source=kalshi&limit=20" \
  -H "Authorization: Bearer YOUR_API_KEY"

List Markets endpoint

Full endpoint documentation with playground.

Getting Started

Core Concepts

Tutorials

Account

Market identifiers

The Market object

Price interpretation

Market lifecycle

Platforms

Listing markets

List Markets endpoint

​Market identifiers

​The Market object

​Price interpretation

​Market lifecycle

​Platforms

​Listing markets

List Markets endpoint

Market identifiers

The Market object

Price interpretation

Market lifecycle

Platforms

Listing markets