the402 endpoint detail

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agent402.tools api kalshi-markets

https://agent402.tools/api/kalshi-markets

payable

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. Complement to Polymarket for US-regulated markets and Kalshi-on...

We sent a real POST request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.002
Network
base
Pay to
0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
110 ms
Payment options
12 usable of 12
Last checked
2026-08-10T09:17:52.691Z (1d ago)
Category
finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fagent402.tools%2Fapi%2Fkalshi-markets"