Encode a contract call
Encode a contract call: give a function signature and a JSON array of arguments, get calldata and the 4-byte selector. Computed locally, no node needed.
Not tested: has real-world effectsour last check, 2026-10-21
0 of 0checks answered this week
n/amedian answer time
$0.01listed price per call
n/aprice it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://saylorinnovations.com/api/chain/encode-call
| Category | Everything else |
|---|---|
| Provider host | saylorinnovations.com |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
We never call tools that send, buy, move money or file anything, not even without paying.
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"args": "[\"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045\",\"1000000\"]",
"signature": "transfer(address,uint256)"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"args": {
"description": "the arguments as a JSON array, for example [\"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045\",\"1000000\"]",
"type": "string"
},
"signature": {
"description": "the function signature with types only, for example transfer(address,uint256)",
"type": "string"
}
},
"required": [
"signature",
"args"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"argument_types": {
"description": "types parsed from the signature",
"type": [
"array",
"null"
]
},
"calldata": {
"description": "selector plus ABI-encoded arguments",
"type": "string"
},
"calldata_bytes": {
"description": "length of the calldata",
"type": "number"
},
"note": {
"description": "plain-language reading of the result",
"type": "string"
},
"selector": {
"description": "4-byte function selector",
"type": "string"
},
"signature": {
"description": "the signature that was encoded",
"type": "string"
},
"source": {
"description": "where the data was read from or how it was computed",
"type": "string"
}
},
"required": [
"signature",
"selector",
"calldata",
"calldata_bytes",
"note",
"source"
],
"type": "object"
},
"type": {
"const": "json",
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}