Kalshi markets list
POST https://agent402.tools/api/kalshi-markets
List Kalshi markets (CFTC-regulated US event contracts). Filter by status (open/closed/settled/unopened) or by event ticker. Returns yes/no bid/ask, last price, volume, open interest, and the resting contract size at the best yes bid and ask (yesBidSize/yesAskSize). Covers US-regulated markets and Kalshi-only categories (weather, economic data).
Warnings
Wallet mismatch The payout wallet in its live payment answer differs from its catalogue listing on the same network.
How to buy
This endpoint takes pay-per-call payments over x402. Call it once without paying to see its live price; any x402 client then pays and retries automatically.
curl -i -X POST "https://agent402.tools/api/kalshi-markets"
# HTTP/1.1 402 Payment Required: price, asset and payTo are in the responseRecent checks
| Checked (UTC) | Result | Status | Time | Live price |
|---|---|---|---|---|
| 2026-10-11 08:30 | Valid 402 | 402 | 86 ms | $0.002 |
| 2026-10-11 04:00 | Valid 402 | 402 | 98 ms | $0.002 |
| 2026-10-10 23:30 | Valid 402 | 402 | 203 ms | $0.002 |
| 2026-10-10 18:15 | Valid 402 | 402 | 72 ms | $0.002 |
Receipts
No test purchases yet. Graded test purchases are next on our list; until then every number here comes from unpaid checks.
What a check proves