Marketplace · API · x402

api.hyperextend.xyz/v1/outcome/100/oi

Derived two-sided open interest for a HIP-4 outcome market, per minute (circulating-supply times mark, summed over both sides). Priced per row ($0.000025 premium); served live. Takes the integer outcome id (e.g. 100).

Endpoint	`https://api.hyperextend.xyz/v1/outcome/100/oi`
Trust	✓ Verified callable · 100% uptime over 1 checks · ~1044 ms
Pricing	Pay per call with x402, no account. Call it to get an exact quote before paying.
network	eip155:8453
scheme	exact
pay to	0x548fC289526ab2F0391D562a723cdA64Bbf1abc4
method	GET
last updated	2026-10-20T19:10:26.694Z

Use it

Call it (an x402 client pays automatically)

curl -i https://api.hyperextend.xyz/v1/outcome/100/oi
# 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-e0f53ecee3c2586e

Search the whole marketplace from your agent (MCP)

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