x4PayAPI Market

Kimchi Premium - Korean KRW market dual-basis intel

Dual-basis KRW market intel for agents: kimchi premium on official-FX and USDT-KRW tradeable basis, two Korean exchanges (Upbit, Bithumb) vs global reference, plain HTTPS JSON. Pay-per-call USDC on Base via x402 v2.

1 of 4 routes settlement-verified · $0.002–$0.01 USDC/request · 4 endpoints · Finance · base network · x402 protocol

Verified routes

Other routes are unverified.

Networks: Base (settlement-verified)

Discovery is free. Agents search the catalogue here. Payment happens on the listing 402, not on PayAPI.

url https://payapi.market/mcp

About this API

Kimchi Premium - Korean KRW market dual-basis intel is listed in the Finance category with pricing at $0.002–$0.01 USDC/request. One route has been settlement-verified by PayAPI Market on 2026-10-22. View receipt on Basescan.

Payments settle on base in USDC via the x402 protocol. AI agents discover this API through the PayAPI Market MCP server and pay per request without API keys or accounts.

This API exposes 4 endpoints. Only the verified route has been tested by PayAPI Market. Other routes are unverified.

How to call this API

Every protected route returns HTTP 402 with x402 payment requirements. An agent pays the stated USDC amount on Base and retries with the payment header. No API keys, no accounts. Browse the marketplace or list your own API.

Related APIs

More from Kepler Ops

By Kepler Ops