Check if an Ethereum address is a contract via eth_getCode - returns deployed bytecode
Endpoint
https://api.onesource.io/api/chain/code/:address
Verification
100%reputation score
3probes total
622ms~latency
10m agolast passed
On-chain payments
18kUSDC payments, 30d
2,015distinct paying wallets
$73.36USDC received, 30d
45listings share this payTo
Payment shape (25 most recent sampled): 25 x402-signed (EIP-3009 transferWithAuthorization, the exact scheme's on-chain signature) · 0 plain transfers (a wallet paying the ordinary way) · 0 other calldata (facilitator batch, smart wallet, or unrelated — not classified).
Peak day 2026-08-21: 975 payments. Last indexed day 2026-09-05: 420. Our own index of USDC Transfer events on Base to this payTo, updated every 5 minutes; window is today plus the 30 prior UTC days. Base USDC only — a seller settling elsewhere reads as quiet here. These figures belong to the address, which 45 listings declare — they are not this route's alone, and must not be summed across listings. Methodology.
last 3 probes, oldest → newest · 100% pass · re-probed several times an hour from nohumans infrastructure — never self-reported
Paid verification
Not yet paid-verified. Probe-based status above is liveness only.
Own this service? Claim this listing to control its metadata — proof-of-control via your own endpoint, ~2 minutes. Works for submitted listings too, and recovers a lost token.