Access to arbitrage opportunities between Polymarket and KalshiGET /opportunities · x402 API by arb
Access to arbitrage opportunities between Polymarket and Kalshi. Pricing valid at time of call. By proceeding you acknowledge opportunities do not always exist and results may be empty. Data provided for informational purposes only; verify all calculations yourself, markets move quickly. You are solely responsible for any actions you choose to take.
What does this x402 API do?
Access to arbitrage opportunities between Polymarket and Kalshi. This is an x402-gated GET API resource from arb. TOLL·402 confirmed a protocol-valid HTTP 402 quote on 2026-07-21. The listing records $0.25 USD-denominated per request on Base. No settled paid call has been verified.
- Published price
- $0.25 USD-denominated per request
- Networks
- Base
- Latest evidence
- TOLL·402 confirmed a protocol-valid HTTP 402 quote on 2026-07-21
- Resource ID
- aac55425bad7aa6efe6b354e
Start with a quote-only recipe. Payment signing stays in your project.
const response = await fetch("https://arb.axryl.com/opportunities", {
method: "GET",
});
console.log(response.status);
console.log(Object.fromEntries(response.headers));
console.log((await response.text()).slice(0, 1000));
// A valid 402 is a quote, not a completed paid call.This sends no payment. Inspect the 402 response before adding a wallet-enabled client.
- Live 402 quote confirmed
GET returned a protocol-valid 402 quote (402). No payment was made.
- Origin reachable
HEAD https://arb.axryl.com/ returned 200.
- Observed in cdp-bazaar
The registry record was observed and retained with provenance.
- Observed in 402-index
Discovered through bazaar.
- Registry record checked
Registry health: healthy.
What evidence supports this listing?
Each record has an exact-route quote outcome. Unresolved templates and potentially mutating methods are labeled instead of being invoked without provider-specific test input. A quote is still separate from a settled paid call. Read the discovery and verification methodology →
Which networks and payment options does it accept?
The normalized listing price is $0.25 USD-denominated per request. Raw protocol requirements remain visible below for implementation and audit use.