Base Contract Type and Proxy Detection
https://base-onchain-tools.dolerite.workers.dev/v1/base/contract-typeOverview
Identify what a Base contract actually is: ERC-20, ERC-721 or ERC-1155 via ERC-165, plus proxy detection across EIP-1967, EIP-1822 and the legacy ZeppelinOS slot, with the current implementation address and a warning when behaviour is upgradeable. Query param: address.
Protocol
x402
Price
$0.0020
Payment Asset
USDC
Payment Network
base
Category
crypto/onchain-infrastructure
Provider
base-onchain-tools
Source
self-registered
Indexed
2026-08-21 10:28:46
Health
Status
healthy
Latency (p50)
804ms
Uptime (30d)
100.0%
Reliability Score
90/100
Last Checked
2026-10-22 03:52:28
Last Healthy
2026-10-22 03:52:28
Consecutive Failures
0
x402 Payment Validation
Payment Requirements
Valid
Asset Verified
Known USDC
Facilitator
—
Recent Health Checks
| Time | Status | HTTP | Latency | Error |
|---|---|---|---|---|
| 2026-10-22 03:52:28 | healthy | 402 | 463ms | |
| 2026-10-21 20:00:50 | healthy | 402 | 1064ms | |
| 2026-10-21 10:05:08 | healthy | 402 | 665ms | |
| 2026-10-20 17:50:56 | healthy | 402 | 804ms | |
| 2026-10-20 00:14:20 | healthy | 402 | 627ms | |
| 2026-10-19 19:35:18 | healthy | 402 | 960ms |