Decode a 4-byte function selector or calldata into human-readable Solidity funct...
https://api.x402node.dev/chain/sig-decodeOverview
Decode a 4-byte function selector or calldata into human-readable Solidity function signatures via openchain - reverses on-chain selectors that LLMs cannot know. function selector, 4byte decode, sig decode, calldata decode, method id, selector lookup
Protocol
x402
Price
$0.0040
Payment Asset
USD Coin
Payment Network
Base
Category
uncategorized
Provider
x402node
Source
bazaar
Indexed
2026-06-12 07:15:29
Health
Status
healthy
Latency (p50)
463ms
Uptime (30d)
100.0%
Reliability Score
95/100
Last Checked
2026-06-28 21:59:35
Last Healthy
2026-06-28 21:59:35
Consecutive Failures
0
x402 Payment Validation
Payment Requirements
Valid
Asset Verified
—
Facilitator
—
Input Schema
{
"discoverable": true,
"method": "GET",
"queryParams": {
"data": "Data (optional)",
"selector": "4-byte selector or full calldata, e.g. 0xa9059cbb (required)",
"sig": "Sig (optional)"
},
"type": "http"
}
Recent Health Checks
| Time | Status | HTTP | Latency | Error |
|---|---|---|---|---|
| 2026-06-28 21:59:35 | healthy | 402 | 140ms | |
| 2026-06-28 16:30:00 | healthy | 402 | 500ms | |
| 2026-06-28 14:15:55 | healthy | 402 | 463ms | |
| 2026-06-28 08:30:28 | healthy | 402 | 500ms | |
| 2026-06-27 11:21:03 | healthy | 402 | 144ms |