Bytecode selector scan for 16 EVM chains: known functions found and capability f...
https://saylorinnovations.com/api/chain/function-selectorsOverview
Bytecode selector scan for 16 EVM chains: known functions found and capability flags such as mint, pause, blacklist, permit, fees and trading switch.
Protocol
x402
Price
$0.01
Payment Asset
USD Coin
Payment Network
eip155:8453
Category
uncategorized
Provider
Saylor Innovations Data Desk
Source
bazaar
Indexed
2026-10-21 04:24:46
Health
Status
healthy
Latency (p50)
388ms
Uptime (30d)
100.0%
Reliability Score
95/100
Last Checked
2026-10-28 15:23:45
Last Healthy
2026-10-28 15:23:45
Consecutive Failures
0
x402 Payment Validation
Payment Requirements
Valid
Asset Verified
Known USDC
Facilitator
—
Input Schema
{
"method": "GET",
"queryParams": {
"address": "0xdAC17F958D2ee523a2206206994597C13D831ec7",
"chain": "ethereum"
},
"type": "http"
}
Output Schema
{
"example": {
"address": "0xdAC17F958D2ee523a2206206994597C13D831ec7",
"capabilities": {
"blacklist_functions": false,
"burnable": false,
"fee_controls": false,
"flash_loans": false,
"mintable": false,
"ownable": true,
"pausable": true,
"permit_support": false,
"rescue_or_sweep": false,
"role_based_access": false,
"selfdestruct_function": false,
"trading_switch": false,
"tx_limits": false,
"upgradeable_proxy_logic": false
},
"chain": "ethereum",
"chain_id": 1,
"code_size_bytes": 11075,
"known": [
{
"selector": "0x06fdde03",
"signature": "name()"
},
{
"selector": "0x095ea7b3",
"signature": "approve(address,uint256)"
},
{
"selector": "0x18160ddd",
"signature": "totalSupply()"
},
{
"selector": "0x23b872dd",
"signature": "transferFrom(address,address,uint256)"
},
{
"selector": "0x313ce567",
"signature": "decimals()"
},
{
"selector": "0x3f4ba83a",
"signature": "unpause()"
},
{
"selector": "0x5c975abb",
"signature": "paused()"
},
{
"selector": "0x70a08231",
"signature": "balanceOf(address)"
},
{
"selector": "0x8456cb59",
"signature": "pause()"
},
{
"selector": "0x8da5cb5b",
"signature": "owner()"
},
{
"selector": "0x95d89b41",
"signature": "symbol()"
},
{
"selector": "0xa9059cbb",
"signature": "transfer(address,uint256)"
},
{
"selector": "0xdd62ed3e",
"signature": "allowance(address,address)"
},
{
"selector": "0xf2fde38b",
"signature": "transferOwnership(address)"
}
],
"known_selectors": 14,
"looks_like_proxy": false,
"note": "Selectors are 4-byte values found as PUSH4 constants in the deployed bytecode and matched against a list of 75 common signatures. Capabilities are hints from that match: a function can exist but be unreachable or access-controlled. A proxy shows the proxy's own few selectors, so check its implementation too.",
"selectors_found": 36,
"source": "Chain JSON-RPC (ethereum)",
"unknown_selectors": 22
},
"type": "json"
}
Recent Health Checks
| Time | Status | HTTP | Latency | Error |
|---|---|---|---|---|
| 2026-10-28 15:23:45 | healthy | 402 | 433ms | |
| 2026-10-28 14:18:23 | healthy | 402 | 436ms | |
| 2026-10-28 05:44:15 | healthy | 402 | 324ms | |
| 2026-10-28 04:46:14 | healthy | 402 | 338ms | |
| 2026-10-28 03:52:22 | healthy | 402 | 300ms | |
| 2026-10-28 02:53:12 | healthy | 402 | 308ms | |
| 2026-10-28 01:48:47 | healthy | 402 | 388ms | |
| 2026-10-28 00:41:47 | healthy | 402 | 306ms | |
| 2026-10-27 23:45:28 | healthy | 402 | 342ms | |
| 2026-10-27 22:59:35 | healthy | 402 | 345ms | |
| 2026-10-27 21:48:19 | healthy | 402 | 985ms | |
| 2026-10-27 20:33:23 | healthy | 402 | 475ms | |
| 2026-10-27 19:28:56 | healthy | 402 | 233ms | |
| 2026-10-27 18:22:51 | healthy | 402 | 709ms | |
| 2026-10-26 17:59:38 | healthy | 402 | 703ms | |
| 2026-10-26 04:30:09 | healthy | 402 | 1142ms |