Pre-sign gas estimate on 16 EVM chains
Pre-sign gas estimate on 16 EVM chains: gas units, fee in native coin, price in gwei and revert detection for a transaction, nothing is sent.
Answeringour last check, 2026-10-21
1 of 1checks answered this week
288 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/chain/estimate-gas
| 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 | $0.01 | 288 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"chain": "ethereum",
"from": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"to": "0x000000000000000000000000000000000000dEaD",
"value": "1000000000000000"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"chain": {
"description": "chain name (ethereum, base, arbitrum, optimism, polygon, bsc, avalanche, gnosis, linea, scroll, mantle, blast, sonic, celo, berachain, unichain) or chain id",
"type": "string"
},
"from": {
"description": "optional sender address (needed when the call depends on the sender)",
"type": "string"
},
"to": {
"description": "the recipient or contract address",
"type": "string"
},
"value": {
"description": "optional value in wei (decimal or 0x hex)",
"type": "string"
}
},
"required": [
"chain",
"to"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"base_fee_gwei": {
"description": "latest base fee in gwei",
"type": [
"number",
"null"
]
},
"chain": {
"description": "the chain name that was queried",
"type": "string"
},
"chain_id": {
"description": "EIP-155 chain id of that network",
"type": "number"
},
"estimated_fee_native": {
"description": "gas estimate times gas price in native coin units (excludes any L1 data fee on L2s)",
"type": [
"number",
"null"
]
},
"from": {
"description": "sender used for the simulation, if given",
"type": [
"string",
"null"
]
},
"gas_estimate": {
"description": "estimated gas units, null when the call would revert",
"type": [
"number",
"null"
]
},
"gas_limit_with_20pct_buffer": {
"description": "estimate plus 20 percent, a safe gas limit",
"type": "number"
},
"gas_price_gwei": {
"description": "current gas price in gwei",
"type": [
"number",
"null"
]
},
"is_plain_transfer": {
"description": "true for a 21000 gas native transfer",
"type": "boolean"
},
"native_symbol": {
"description": "ticker of the native coin",
"type": "string"
},
"note": {
"description": "scope of the estimate",
"type": "string"
},
"revert_reason": {
"description": "node error text when the call would revert",
"type": "string"
},
"source": {
"description": "where the data was read from",
"type": "string"
},
"to": {
"description": "recipient or contract",
"type": "string"
},
"will_revert": {
"description": "true when the node simulation failed",
"type": "boolean"
}
},
"required": [
"chain",
"chain_id",
"to",
"will_revert",
"note",
"source"
],
"type": "object"
},
"type": {
"const": "json",
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}