api.onesource.io
x402Grade BLast checked 3 hours ago
GET https://api.onesource.io/api/chain/storage
Read a raw storage slot from any Ethereum contract via eth_getStorageAt
Price$0.005per chain read · paid in USD on Base
Uptime100%
4/4 probes · 672 ms
Score81Grade B
Paid usage, 30 days136payers · 136 calls
Warnings
Few repeat buyers Most payers called it only once, a pattern typical of crawlers or volume farming, so its usage counts half.
How to buy
This endpoint takes pay-per-call payments over x402. Call it once without paying to see its live price; any x402 client then pays and retries automatically.
curl -i -X GET "https://api.onesource.io/api/chain/storage"
# HTTP/1.1 402 Payment Required: price, asset and payTo are in the responseRecent checks
| Checked (UTC) | Result | Status | Time | Live price |
|---|---|---|---|---|
| 2026-10-11 07:45 | Valid 402 | 402 | 974 ms | $0.005 |
| 2026-10-11 03:30 | Valid 402 | 402 | 829 ms | $0.005 |
| 2026-10-10 23:00 | Valid 402 | 402 | 401 ms | $0.005 |
| 2026-10-10 17:15 | Valid 402 | 402 | 515 ms | $0.005 |
Receipts
No test purchases yet. Graded test purchases are next on our list; until then every number here comes from unpaid checks.
What a check proves