Output Schema
{
"example": {
"also_try": [
{
"free_sample": "https://agents.avasis.ai/v1/evm/gas-ops/sample",
"price_usd": "0.05",
"url": "https://agents.avasis.ai/v1/evm/gas-ops",
"what": "EVM gas ops kit: Ethereum gas + Base gas fee tiers (slow/standard/fast/urgent), EIP-1559 next base fee, USD cost per tx and for your gas_limit, Base-vs-Ethereum pick, plus Solana slot / priority fees / SOL-USD; one shot, $0.05"
},
{
"free_sample": "https://agents.avasis.ai/v1/evm/tx-precheck/sample",
"price_usd": "0.02",
"url": "https://agents.avasis.ai/v1/eth/tx-precheck",
"what": "Ethereum tx precheck: simulate YOUR unsigned transaction before you sign (would it revert + reason, gas in USD, every transfer, approval exposure, counterparty risk): SIGN / CAUTION / BLOCK"
}
],
"alternatives": [
{
"blocks": [
2,
10
],
"expected": {
"eth": 0.00005915,
"usd": 0.152637
},
"maxFeePerGas": {
"gwei": 0.96125
},
"tier": "slow",
"urgency": "low"
},
{
"blocks": [
1,
1
],
"expected": {
"eth": 0.00012415,
"usd": 0.320369
},
"maxFeePerGas": {
"gwei": 2.32
},
"tier": "fast",
"urgency": "high"
},
{
"blocks": [
1,
1
],
"expected": {
"eth": 0.00015665,
"usd": 0.404235
},
"maxFeePerGas": {
"gwei": 3.23
},
"tier": "urgent",
"urgency": "next_block"
}
],
"chain": "ethereum",
"chainId": 1,
"computedAt": "2026-10-29T12:00:00.500Z",
"decision": {
"action": "send_now",
"reason": "standard tier for normal urgency: latest block 46.3% full vs 50% target, base fee falling (-0.925% next block); expected $0.237 for 65000 gas, typically 1-2 blocks (~12-24 s)",
"requested_tier": "standard",
"tier": "standard"
},
"eth_usd": {
"available": true,
"price": 2580.5,
"source": "chainlink ETH/USD aggregator on Base (latestRoundData)"
},
"headline": "Ethereum: standard tier (normal urgency) = maxFee 1.82 gwei / tip 1 gwei, ~$0.237 for 65000 gas, ~1-2 blocks · send now",
"how_to_use": [
"Type-2 (EIP-1559) transaction: copy ready_to_sign.maxFeePerGas and maxPriorityFeePerGas (hex wei) into your transaction with your to / value / data / nonce; decision.action says send_now, downgrade (a cheaper tier fits max_usd) or wait (re-quote after recheck_in)."
],
"inputs": {
"calldata_bytes": null,
"gas_limit": 65000,
"max_usd": null,
"urgency": "normal"
},
"kit": "evm-fee-plan-1",
"l1_data_fee": {
"applicable": false,
"available": false
},
"market": {
"base_fee": {
"gwei": 0.41
},
"block": {
"ageSeconds": 5,
"gasUsedPct": 46.3,
"number": 23700000,
"timestamp": 1761739195
},
"next_block": {
"base_fee_direction": "falling",
"change_pct": -0.925,
"label": "balanced",
"next_base_fee_estimate": {
"gwei": 0.406208
}
},
"observedAt": "2026-10-29T12:00:00.000Z",
"priority": {
"basis": "node eth_maxPriorityFeePerGas",
"gwei": 1
}
},
"plan": {
"cost": {
"expected": {
"eth": 0.00009165,
"usd": 0.236503
},
"gas": 65000,
"max_authorized": {
"eth": 0.0001183,
"usd": 0.305273
}
},
"inclusion": {
"blocks": [
1,
2
],
"seconds": [
12,
24
]
},
"maxFeePerGas": {
"gwei": 1.82
},
"maxPriorityFeePerGas": {
"gwei": 1
},
"tier": "standard",
"urgency": "normal"
},
"ready_to_sign": {
"chainId": "0x1",
"gas": "0xfde8",
"maxFeePerGas": "0x6c7aff00",
"maxPriorityFeePerGas": "0x3b9aca00",
"tier": "standard",
"type": "0x2"
},
"sources": [
"publicnode ethereum rpc (via stream hub)",
"chainlink ETH/USD (Base feed)"
]
},
"type": "json"
}