Use when you hold raw EVM calldata and need to know what function it calls
Use when you hold raw EVM calldata and need to know what function it calls: returns selector, matching signatures (built-in + openchain/4byte) and ABI-decoded args for each candidate; unknown selectors return signaturesFound:0 instead of an error. Optional {signature} override. Example: 0xa9059cbb… -> transfer(address,uint256) with args. $0.002, no signup; not charged if the call errors.
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://lumenworks-x402-decoder.onrender.com/v1/calldata/decode
| Category | Everything else |
|---|---|
| Provider host | lumenworks-x402-decoder.onrender.com |
| Networks | eip155:42220, eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
We never call tools that send, buy, move money or file anything, not even without paying.
Example input (from the provider)
{
"body": {
"data": "0xa9059cbb000000000000000000000000ee9790cb3960952f585379f831a89b4e00b4029a00000000000000000000000000000000000000000000000000000000000f4240"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"data": {
"description": "Calldata hex starting with the 4-byte selector (0x\u2026)",
"type": "string"
},
"signature": {
"description": "Optional function signature override, e.g. transfer(address,uint256)",
"type": "string"
}
},
"required": [
"data"
]
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}