Decode a 4-byte EVM function selector or 32-byte event topic into candidate sign
Decode a 4-byte EVM function selector or 32-byte event topic into candidate signatures from OpenChain and 4byte with the verified one first and collision warnings
Answers HTTP 404 without x402 payment termsour last check, 2026-10-18
0 of 1checks answered this week
n/amedian answer time
$0.01listed price per call
n/aprice it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://saylorinnovations.com/api/evm/selector
| Category | Everything else |
|---|---|
| Provider host | saylorinnovations.com |
| Networks | eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-18 | no x402 terms | 404 | 451 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"hex": "0xa9059cbb"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET",
"POST",
"PUT",
"PATCH",
"DELETE",
"HEAD"
],
"type": "string"
},
"queryParams": {
"properties": {
"hex": {
"description": "4-byte function selector (0xa9059cbb) or 32-byte event topic",
"type": "string"
}
},
"required": [
"hex"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"best_guess": {
"description": "Best guess",
"type": "string"
},
"candidates": {
"type": "array"
},
"collision_warning": {
"description": "Collision warning",
"type": [
"string",
"null"
]
},
"hex": {
"type": "string"
},
"kind": {
"description": "Kind of record",
"type": "string"
},
"note": {
"description": "Caveat or context for reading the result",
"type": "string"
},
"source": {
"description": "Data source the values come from",
"type": "string"
},
"well_known_meaning": {
"description": "Well known meaning",
"type": [
"string",
"null"
]
}
},
"required": [
"hex",
"kind",
"best_guess"
],
"type": "object"
},
"type": {
"const": "json",
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}