Decode EVM calldata into plain English
Decode EVM calldata into plain English: ERC-20, NFT, Uniswap, Aave and permit calls, with risk flags for unlimited approvals, setApprovalForAll and proxy upgrades.
Answeringour last check, 2026-10-21
1 of 1checks answered this week
1606 msmedian answer time
$0.01listed price per call
$0.01price 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/crypto/tx-explain
| Category | Market data |
|---|---|
| Provider host | saylorinnovations.com |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 2 from 2 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-21 | valid payment request | 402 | $0.01 | 1606 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"chain": "ethereum",
"data": "0x095ea7b30000000000000000000000007a250d5630b4cf539739df2c5dacb4c659f2488dffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
"to": "0xdAC17F958D2ee523a2206206994597C13D831ec7"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"chain": {
"description": "optional: ethereum, base, arbitrum, optimism, polygon, bsc or avalanche; adds a contract-vs-account check on the destination",
"type": "string"
},
"data": {
"description": "optional calldata as 0x hex; omit for a plain transfer",
"type": "string"
},
"to": {
"description": "the contract or recipient address (0x...)",
"type": "string"
}
},
"required": [
"to"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"chain": {
"description": "Blockchain the data is for",
"type": [
"string",
"null"
]
},
"decoded": {
"type": [
"object",
"null"
]
},
"known_function": {
"description": "Known function",
"type": [
"boolean",
"null"
]
},
"native_symbol": {
"description": "Native symbol",
"type": "string"
},
"note": {
"description": "Caveat or context for reading the result",
"type": "string"
},
"risk_level": {
"description": "Risk level",
"type": "string"
},
"risks": {
"type": "array"
},
"selector": {
"type": [
"string",
"null"
]
},
"source": {
"description": "Data source the values come from",
"type": "string"
},
"summary": {
"description": "Short summary",
"type": "string"
},
"to": {
"description": "End of the range",
"type": [
"string",
"null"
]
},
"to_kind": {
"description": "To kind",
"type": [
"string",
"null"
]
},
"to_label": {
"description": "To label",
"type": [
"string",
"null"
]
},
"value_native": {
"description": "Value native",
"type": "number"
},
"value_wei": {
"description": "Value wei",
"type": "string"
}
},
"required": [
"value_wei",
"value_native",
"native_symbol",
"summary",
"risk_level",
"risks",
"note",
"source"
],
"type": "object"
},
"type": {
"const": "json",
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}