x4PayAPI Market

Live prices from TWO labeled venues per symbol: Coinbase exchange spot (+ 24h…

Live prices from TWO labeled venues per symbol: Coinbase exchange spot (+ 24h stats) AND the gTrade venue leg { gains: { pairIndex, mark, index } } — mark is what fills on Gains, index is the oracle spot liquidations use. Live prices from TWO labeled venues per symbol: Coinbase exchange spot (+ 24h stats) AND the gTrade venue leg { gains: { pairIndex, mark, index } } — mark is what fills on Gains, index is the oracle spot liquidations use. Same feeds the human chart runs on; the cross-venue spread between them is real, tradeable divergence (lead/lag arbitrage). Covers Gains-listed symbols Coinbase lacks (e.g. Full details: GET /v1.

1 route settlement-verified · $0.001 USDC/request · 1 endpoint · 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

Live prices from TWO labeled venues per symbol: Coinbase exchange spot (+ 24h… is listed in the Finance category with pricing at $0.001 USDC/request. One route has been settlement-verified by PayAPI Market on 2026-10-21. 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 1 endpoint.

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.

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