ApiToll Multi-Chain EVM Gas
GET evm-gas.apitoll.cloud/v1/evm/gas
Why an agent can trust this route.
Sonar evidence is advisory. Paid delivery is shown as verified only when paid probes are available; otherwise route estimates use the unpaid handshake as a clearly labeled proxy.
Observed outcomes
Multi-chain EVM gas price oracle for AI agents — 17 chains (Ethereum, Base, Arbitrum, Optimism, Polygon, BNB, Avalanche…). One x402 call returns slow/standard/fast EIP-1559 tiers as DROP-IN maxFeePerGas + maxPriorityFeePerGas in wei (plug straight into a viem/ethers tx, no conversion, exact even on sub-gwei L2s), plus base fee, head block, and fullness, from a live eth_feeHistory call. Pass ?chain= to switch chains.
Resource: evm-gas.apitoll.cloud/v1/evm/gas
Network: eip155:8453 · Asset: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 · Pay to: 0xcc69d619E6053F88A4845066518f465bD06Fc96c
Payment methods: — · Last validation: 2026-10-22 12:12:09.956+00
{
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"chain"
],
"properties": {
"chain": {
"enum": [
"ethereum",
"base",
"optimism",
"arbitrum",
"polygon",
"avalanche",
"gnosis",
"linea",
"scroll",
"blast",
"mode",
"opbnb",
"celo",
"bsc",
"fantom",
"zksync",
"mantle"
],
"type": "string",
"description": "Target EVM chain id. One of: ethereum, base, optimism, arbitrum, polygon, avalanche, gnosis, linea, scroll, blast, mode, opbnb, celo, bsc, fantom, zksync, mantle. Also accepts common aliases (eth, arb, op, matic, avax, bnb). Default: ethereum."
},
"blocks": {
"type": "integer",
"maximum": 50,
"minimum": 1,
"description": "Recent blocks to sample for percentile reward (1..50, clamped)."
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"properties": {
"caip2": {
"type": "string"
},
"chain": {
"enum": [
"ethereum",
"base",
"optimism",
"arbitrum",
"polygon",
"avalanche",
"gnosis",
"linea",
"scroll",
"blast",
"mode",
"opbnb",
"celo",
"bsc",
"fantom",
"zksync",
"mantle"
],
"type": "string"
},
"stats": {
"type": "object",
"properties": {
"ts": {
"type": "string",
"format": "date-time"
},
"blocks_sampled": {
"type": "integer"
},
"median_fullness_pct": {
"type": "number"
}
}
},
"tiers": {
"type": "object",
"properties": {
"fast": {
"type": "object",
"properties": {
"maxFeePerGas": {
"type": "string"
},
"max_fee_gwei": {
"type": "number"
},
"max_priority_gwei": {
"type": "number"
},
"maxPriorityFeePerGas": {
"type": "string"
}
}
},
"slow": {
"type": "object",
"properties": {
"maxFeePerGas": {
"type": "string"
},
"max_fee_gwei": {
"type": "number"
},
"max_priority_gwei": {
"type": "number"
},
"maxPriorityFeePerGas": {
"type": "string"
}
}
},
"standard": {
"type": "object",
"properties": {
"maxFeePerGas": {
"type": "string"
},
"max_fee_gwei": {
"type": "number"
},
"max_priority_gwei": {
"type": "number"
},
"maxPriorityFeePerGas": {
"type": "string"
}
}
}
},
"description": "Slow (p10) / standard (p50) / fast (p90) EIP-1559 fee tiers. Each carries human gwei (max_fee_gwei/max_priority_gwei) AND DROP-IN wei (maxFeePerGas/maxPriorityFeePerGas, BigInt-ready) to plug straight into a viem/ethers tx."
},
"gas_note": {
"type": "string"
},
"gas_model": {
"enum": [
"eip1559",
"mostly-legacy",
"non-standard"
],
"type": "string"
},
"chain_name": {
"type": "string"
},
"base_fee_wei": {
"type": "string",
"description": "Base fee in wei (exact, BigInt-ready decimal string)."
},
"block_number": {
"type": "integer"
},
"base_fee_gwei": {
"type": "number",
"description": "Base fee for the next block (gwei, human-readable)."
}
}
}
}
},
"paymentRequirements": [
{
"raw": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xcc69d619E6053F88A4845066518f465bD06Fc96c",
"amount": "1000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"payTo": "0xcc69d619E6053F88A4845066518f465bD06Fc96c",
"scheme": "exact",
"network": "eip155:8453",
"amountAtomic": "1000"
}
]
}Source catalog records are retained separately from live endpoint observations. Sonar score, uptime, and latency are advisory metrics. CDP indexing is not inferred from validation.