Marketplace · API · x402

api.onesource.io/api/chain/code/:address

Check if an Ethereum address is a contract via eth_getCode - returns deployed bytecode

Endpointhttps://api.onesource.io/api/chain/code/:address
Trust✓ Verified callable · 100% uptime over 1 checks · ~431 ms
PricingPay per call with x402, no account. Call it to get an exact quote before paying.
networkeip155:8453
schemeexact
pay to0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3ea
methodGET
last updated2026-11-12T21:43:04.964Z

Use it

Call it (an x402 client pays automatically)

curl -i https://api.onesource.io/api/chain/code/:address
# 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/x402-0f2f2282379e3b5d

Search the whole marketplace from your agent (MCP)

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