onesource.io
https://api.onesource.io
● healthy
general
Check if an Ethereum address is a contract via eth_getCode - returns deployed bytecode -- reliability 84.07819366455078/100 per Paygent Discover
Category
general
Chains
base
Price
$0.0030 USDC / call
Quality grade
How grading works
A
100.0 / 100
Availability
40.0 / 40
Endpoint responded (HTTP 200)
Payability
20.0 / 20
- ✓ Answers a real HTTP 402 challenge
- ✓ Publishes a /.well-known/x402 descriptor
- ✓ Payment address on record
- ✓ Settlement network declared
- ✓ Price declared
Demand
40.0 / 40
1808 distinct payers, 19186 USDC transfers in the last 30 days
Owner verified
0.0 / 3
Nobody has claimed this listing yet
Endpoint last checked 3 h ago.
On-chain activity last read 2 d ago.
Availability is re-probed every 4 hours and on-chain demand daily; the grade
updates automatically on the next pass.
Paid endpoints
25 resource(s) advertised by this origin.
GET /api/chain/allowance
GET /api/chain/block-number
GET /api/chain/block/{number}
GET /api/chain/chain-id
GET /api/chain/code/{address}
GET /api/chain/contract/{address}
GET /api/chain/ens/{input}
GET /api/chain/erc1155-balance
GET /api/chain/erc20-balance
GET /api/chain/erc20-transfers
GET /api/chain/erc721-tokens
GET /api/chain/events
GET /api/chain/live-balance
GET /api/chain/network-info
GET /api/chain/nft-metadata
GET /api/chain/nft-owner
GET /api/chain/nonce/{address}
GET /api/chain/pending
GET /api/chain/proxy/{address}
GET /api/chain/receipt/{hash}
GET /api/chain/storage
GET /api/chain/total-supply
GET /api/chain/tx/{hash}
POST /api/chain/call
POST /api/chain/estimate-gas
How to call
cURL · x402-fetch / x402-axios will auto-handle 402
curl -X POST https://api.onesource.io/.well-known/x402.json
https://api.onesource.io/.well-known/x402
Listed in
Directories this entry was found in.
paygent-discover