4SEC Market Data APIMulti-DEX Aggregated Crypto Prices

Real-time prices, arbitrage detection, and risk metrics from 8+ DEXes. Pay per request with USDC on Base via x402.

Quick Start

API Reference

📊

Multi-DEX Aggregation

Volume-weighted prices from Uniswap, SushiSwap, Curve, BaseSwap, and 4 more.

💹

Arbitrage Detection

Real-time cross-DEX arbitrage with profit calculations.

🛡️

Risk Metrics

Volatility, VaR, Sharpe ratio, sentiment analysis.

⚡

Real-time Data

30s cache TTL, 100 req/min rate limit.

💰

Pay-As-You-Go (x402)

No subscriptions. Pay per request with USDC on Base.

🤖

AI Agent Ready

Auto-payment via x402. No API keys.

Quick Example

Install the x402 client and start fetching data in under 5 minutes.

python

from x402.client import X402Client
from eth_account import Account

wallet = Account.from_key("0x...your_private_key...")
client = X402Client(wallet=wallet)

response = client.get("https://api.foursec.xyz/price/ETH")
data = response.json()
print(f"ETH: ${data['price_usd']}")  # ETH: $2450.32

Pricing

Endpoint	Cost	Notes
`GET /price/:symbol`	$0.01	Real-time aggregated price
`GET /price/history/:symbol`	$0.02	Historical OHLCV data
`GET /volume/:symbol`	$0.01	24h volume data
`GET /spread/:pair`	$0.01	Bid/ask spread
`GET /arbitrage-opportunity`	$0.03	Cross-DEX arbitrage scanner
`GET /volatility-index/:symbol`	$0.02	Risk metrics
`POST /price-alert`	$0.05	Create webhook alert
`GET /health`	Free	Health check

All payments in USDC on Base via x402 protocol. No subscriptions, no API keys.

Supported DEXes

DEX	Chain	Pairs
Uniswap V3	Base, Ethereum	ETH/USDC, BTC/USDC
SushiSwap	Base, Ethereum	ETH/USDC, ETH/USDT
Curve	Ethereum	3pool, ETH/stETH
BaseSwap	Base	ETH/USDC, BASE/ETH
Aerodrome	Base	ETH/USDC, AERO/ETH
PancakeSwap V3	Base, BSC	ETH/USDC, BNB/USDC
Balancer V2	Ethereum	ETH/USDC, WBTC/ETH
Camelot	Arbitrum	ETH/USDC, ARB/ETH