Marketplace · API · x402

agentx402pay.com/api/kalshi-markets

Search or list open Kalshi prediction markets (regulated US event contracts). q searches every open market title, outcome and event (all words must match), busiest first. No match = 404, not charged. Independently monitored by x402-list.com: 100% uptime since Oct 27, 2026, 14/14 x402 compliance checks (as of Oct 31, 2026). Evidence: https://x402-list.com/services/agentx402pay

Endpoint	`https://agentx402pay.com/api/kalshi-markets`
Trust	Not checked yet
Pricing	Pay per call with x402, no account. Call it to get an exact quote before paying.
network	eip155:8453
scheme	exact
pay to	0xB2BDc37b8481F4CdCF38402CFCd446Ae5133BeeF
method	GET
last updated	2026-11-11T05:34:12.319Z

Use it

Call it (an x402 client pays automatically)

curl -i https://agentx402pay.com/api/kalshi-markets
# 402 reply -> sign PAYMENT-REQUIRED with an x402 client (e.g. @x402/fetch) -> retry with PAYMENT-SIGNATURE

This listing as JSON

curl https://aipaygen.com/v1/catalog/api/x402-6eb78a3a3eec57d0

Search the whole marketplace from your agent (MCP)

{
  "mcpServers": {
    "aipaygen": {
      "url": "https://aipaygen.com/mcp"
    }
  }
}

Prediction market odds (Polymarket) (AIPayGen)
API$0.001/call

agentx402pay.com/api/kalshi-markets

Use it

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