Pre-sign gas estimate on 16 EVM chains: gas units, fee in native coin, price in ...
https://saylorinnovations.com/api/chain/estimate-gasOverview
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.
Protocol
x402
Price
$0.01
Payment Asset
USD Coin
Payment Network
eip155:8453
Category
crypto/transactions
Provider
Saylor Innovations Data Desk
Source
bazaar
Indexed
2026-10-21 00:23:01
Health
Status
degraded
Latency (p50)
393ms
Uptime (30d)
100.0%
Reliability Score
95/100
Last Checked
2026-10-28 16:17:15
Last Healthy
2026-10-28 07:02:49
Consecutive Failures
0
x402 Payment Validation
Payment Requirements
Valid
Asset Verified
Known USDC
Facilitator
—
Input Schema
{
"method": "GET",
"queryParams": {
"chain": "ethereum",
"from": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"to": "0x000000000000000000000000000000000000dEaD",
"value": "1000000000000000"
},
"type": "http"
}
Output Schema
{
"example": {
"base_fee_gwei": 0.098797,
"chain": "ethereum",
"chain_id": 1,
"estimated_fee_native": 0.000002074731288,
"from": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"gas_estimate": 21000,
"gas_limit_with_20pct_buffer": 25200,
"gas_price_gwei": 0.098797,
"is_plain_transfer": true,
"native_symbol": "ETH",
"note": "Simulated by the node against the latest block. Nothing is sent and no key is needed.",
"source": "Chain JSON-RPC (ethereum)",
"to": "0x000000000000000000000000000000000000dEaD",
"will_revert": false
},
"type": "json"
}
Recent Health Checks
| Time | Status | HTTP | Latency | Error |
|---|---|---|---|---|
| 2026-10-28 16:17:15 | degraded | 402 | 1346ms | |
| 2026-10-28 15:24:26 | degraded | 402 | 962ms | |
| 2026-10-28 14:18:57 | degraded | 402 | 2557ms | |
| 2026-10-28 07:02:49 | healthy | 402 | 1592ms | |
| 2026-10-28 05:40:08 | healthy | 402 | 1858ms | |
| 2026-10-28 04:42:32 | healthy | 402 | 348ms | |
| 2026-10-28 03:48:28 | healthy | 402 | 293ms | |
| 2026-10-28 02:48:52 | healthy | 402 | 877ms | |
| 2026-10-28 01:44:24 | healthy | 402 | 286ms | |
| 2026-10-28 00:38:09 | healthy | 402 | 278ms | |
| 2026-10-27 23:41:47 | healthy | 402 | 188ms | |
| 2026-10-27 22:55:33 | healthy | 402 | 258ms | |
| 2026-10-27 21:44:55 | healthy | 402 | 376ms | |
| 2026-10-27 20:30:05 | healthy | 402 | 479ms | |
| 2026-10-27 19:24:48 | healthy | 402 | 347ms | |
| 2026-10-26 11:05:53 | healthy | 402 | 753ms | |
| 2026-10-25 20:52:31 | healthy | 402 | 393ms |