{ "x402Version": 2, "id": 26945, "slug": "26945", "resource": "https://evm-gas.apitoll.cloud/v1/evm/gas", "description": "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.", "type": "http", "serviceName": "ApiToll Multi-Chain EVM Gas", "resourceType": "Beauty & Personal Care", "accepts": [ { "scheme": "exact", "network": "eip155:8453", "payTo": "0xcc69d619E6053F88A4845066518f465bD06Fc96c", "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913", "amount": "1000", "amountUsd": 0.001, "maxTimeoutSeconds": 300 } ], "outputSchema": { "properties": { "example": { "properties": { "base_fee_gwei": { "description": "Base fee for the next block (gwei, human-readable).", "type": "number" }, "base_fee_wei": { "description": "Base fee in wei (exact, BigInt-ready decimal string).", "type": "string" }, "block_number": { "type": "integer" }, "caip2": { "type": "string" }, "chain": { "enum": [ "ethereum", "base", "optimism", "arbitrum", "polygon", "avalanche", "gnosis", "linea", "scroll", "blast", "mode", "opbnb", "celo", "bsc", "fantom", "zksync", "mantle" ], "type": "string" }, "chain_name": { "type": "string" }, "gas_model": { "enum": [ "eip1559", "mostly-legacy", "non-standard" ], "type": "string" }, "gas_note": { "type": "string" }, "stats": { "properties": { "blocks_sampled": { "type": "integer" }, "median_fullness_pct": { "type": "number" }, "ts": { "format": "date-time", "type": "string" } }, "type": "object" }, "tiers": { "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.", "properties": { "fast": { "properties": { "maxFeePerGas": { "type": "string" }, "maxPriorityFeePerGas": { "type": "string" }, "max_fee_gwei": { "type": "number" }, "max_priority_gwei": { "type": "number" } }, "type": "object" }, "slow": { "properties": { "maxFeePerGas": { "type": "string" }, "maxPriorityFeePerGas": { "type": "string" }, "max_fee_gwei": { "type": "number" }, "max_priority_gwei": { "type": "number" } }, "type": "object" }, "standard": { "properties": { "maxFeePerGas": { "type": "string" }, "maxPriorityFeePerGas": { "type": "string" }, "max_fee_gwei": { "type": "number" }, "max_priority_gwei": { "type": "number" } }, "type": "object" } }, "type": "object" } }, "type": "object" }, "type": { "type": "string" } }, "required": [ "type" ], "type": "object" }, "extensions": { "bazaar": { "info": { "input": { "method": "GET", "queryParams": { "blocks": 20, "chain": "ethereum" }, "type": "http" }, "output": { "example": { "base_fee_gwei": 8.421, "base_fee_wei": "8421000000", "block_number": 21403217, "caip2": "eip155:1", "chain": "ethereum", "chain_name": "Ethereum mainnet", "gas_model": "eip1559", "stats": { "blocks_sampled": 20, "median_fullness_pct": 45.5, "ts": "2026-05-28T15:42:30.000Z" }, "tiers": { "fast": { "maxFeePerGas": "14831000000", "maxPriorityFeePerGas": "2200000000", "max_fee_gwei": 14.831, "max_priority_gwei": 2.2 }, "slow": { "maxFeePerGas": "12631000000", "maxPriorityFeePerGas": "1000000", "max_fee_gwei": 12.631, "max_priority_gwei": 0.001 }, "standard": { "maxFeePerGas": "13731000000", "maxPriorityFeePerGas": "1100000000", "max_fee_gwei": 13.731, "max_priority_gwei": 1.1 } } }, "type": "json" } }, "schema": { "$schema": "https://json-schema.org/draft/2020-12/schema", "properties": { "input": { "additionalProperties": false, "properties": { "method": { "enum": [ "GET" ], "type": "string" }, "queryParams": { "properties": { "blocks": { "description": "Recent blocks to sample for percentile reward (1..50, clamped).", "maximum": 50, "minimum": 1, "type": "integer" }, "chain": { "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.", "enum": [ "ethereum", "base", "optimism", "arbitrum", "polygon", "avalanche", "gnosis", "linea", "scroll", "blast", "mode", "opbnb", "celo", "bsc", "fantom", "zksync", "mantle" ], "type": "string" } }, "required": [ "chain" ], "type": "object" }, "type": { "const": "http", "type": "string" } }, "required": [ "type", "method" ], "type": "object" }, "output": { "properties": { "example": { "properties": { "base_fee_gwei": { "description": "Base fee for the next block (gwei, human-readable).", "type": "number" }, "base_fee_wei": { "description": "Base fee in wei (exact, BigInt-ready decimal string).", "type": "string" }, "block_number": { "type": "integer" }, "caip2": { "type": "string" }, "chain": { "enum": [ "ethereum", "base", "optimism", "arbitrum", "polygon", "avalanche", "gnosis", "linea", "scroll", "blast", "mode", "opbnb", "celo", "bsc", "fantom", "zksync", "mantle" ], "type": "string" }, "chain_name": { "type": "string" }, "gas_model": { "enum": [ "eip1559", "mostly-legacy", "non-standard" ], "type": "string" }, "gas_note": { "type": "string" }, "stats": { "properties": { "blocks_sampled": { "type": "integer" }, "median_fullness_pct": { "type": "number" }, "ts": { "format": "date-time", "type": "string" } }, "type": "object" }, "tiers": { "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.", "properties": { "fast": { "properties": { "maxFeePerGas": { "type": "string" }, "maxPriorityFeePerGas": { "type": "string" }, "max_fee_gwei": { "type": "number" }, "max_priority_gwei": { "type": "number" } }, "type": "object" }, "slow": { "properties": { "maxFeePerGas": { "type": "string" }, "maxPriorityFeePerGas": { "type": "string" }, "max_fee_gwei": { "type": "number" }, "max_priority_gwei": { "type": "number" } }, "type": "object" }, "standard": { "properties": { "maxFeePerGas": { "type": "string" }, "maxPriorityFeePerGas": { "type": "string" }, "max_fee_gwei": { "type": "number" }, "max_priority_gwei": { "type": "number" } }, "type": "object" } }, "type": "object" } }, "type": "object" }, "type": { "type": "string" } }, "required": [ "type" ], "type": "object" } }, "required": [ "input" ], "type": "object" } } }, "tags": [ "evm", "gas", "multi-chain", "gas-oracle", "ethereum", "bazaar" ], "sourceHost": "evm-gas.apitoll.cloud", "lastUpdated": "2026-10-10T00:01:53.122Z", "quality": { "calls30d": 8, "uniquePayers30d": 8, "lastCalledAt": "2026-10-10T00:01:52.613Z" }, "metadata": { "serviceName": "ApiToll Multi-Chain EVM Gas", "extensions": { "bazaar": { "info": { "input": { "method": "GET", "queryParams": { "blocks": 20, "chain": "ethereum" }, "type": "http" }, "output": { "example": { "base_fee_gwei": 8.421, "base_fee_wei": "8421000000", "block_number": 21403217, "caip2": "eip155:1", "chain": "ethereum", "chain_name": "Ethereum mainnet", "gas_model": "eip1559", "stats": { "blocks_sampled": 20, "median_fullness_pct": 45.5, "ts": "2026-05-28T15:42:30.000Z" }, "tiers": { "fast": { "maxFeePerGas": "14831000000", "maxPriorityFeePerGas": "2200000000", "max_fee_gwei": 14.831, "max_priority_gwei": 2.2 }, "slow": { "maxFeePerGas": "12631000000", "maxPriorityFeePerGas": "1000000", "max_fee_gwei": 12.631, "max_priority_gwei": 0.001 }, "standard": { "maxFeePerGas": "13731000000", "maxPriorityFeePerGas": "1100000000", "max_fee_gwei": 13.731, "max_priority_gwei": 1.1 } } }, "type": "json" } }, "schema": { "$schema": "https://json-schema.org/draft/2020-12/schema", "properties": { "input": { "additionalProperties": false, "properties": { "method": { "enum": [ "GET" ], "type": "string" }, "queryParams": { "properties": { "blocks": { "description": "Recent blocks to sample for percentile reward (1..50, clamped).", "maximum": 50, "minimum": 1, "type": "integer" }, "chain": { "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.", "enum": [ "ethereum", "base", "optimism", "arbitrum", "polygon", "avalanche", "gnosis", "linea", "scroll", "blast", "mode", "opbnb", "celo", "bsc", "fantom", "zksync", "mantle" ], "type": "string" } }, "required": [ "chain" ], "type": "object" }, "type": { "const": "http", "type": "string" } }, "required": [ "type", "method" ], "type": "object" }, "output": { "properties": { "example": { "properties": { "base_fee_gwei": { "description": "Base fee for the next block (gwei, human-readable).", "type": "number" }, "base_fee_wei": { "description": "Base fee in wei (exact, BigInt-ready decimal string).", "type": "string" }, "block_number": { "type": "integer" }, "caip2": { "type": "string" }, "chain": { "enum": [ "ethereum", "base", "optimism", "arbitrum", "polygon", "avalanche", "gnosis", "linea", "scroll", "blast", "mode", "opbnb", "celo", "bsc", "fantom", "zksync", "mantle" ], "type": "string" }, "chain_name": { "type": "string" }, "gas_model": { "enum": [ "eip1559", "mostly-legacy", "non-standard" ], "type": "string" }, "gas_note": { "type": "string" }, "stats": { "properties": { "blocks_sampled": { "type": "integer" }, "median_fullness_pct": { "type": "number" }, "ts": { "format": "date-time", "type": "string" } }, "type": "object" }, "tiers": { "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.", "properties": { "fast": { "properties": { "maxFeePerGas": { "type": "string" }, "maxPriorityFeePerGas": { "type": "string" }, "max_fee_gwei": { "type": "number" }, "max_priority_gwei": { "type": "number" } }, "type": "object" }, "slow": { "properties": { "maxFeePerGas": { "type": "string" }, "maxPriorityFeePerGas": { "type": "string" }, "max_fee_gwei": { "type": "number" }, "max_priority_gwei": { "type": "number" } }, "type": "object" }, "standard": { "properties": { "maxFeePerGas": { "type": "string" }, "maxPriorityFeePerGas": { "type": "string" }, "max_fee_gwei": { "type": "number" }, "max_priority_gwei": { "type": "number" } }, "type": "object" } }, "type": "object" } }, "type": "object" }, "type": { "type": "string" } }, "required": [ "type" ], "type": "object" } }, "required": [ "input" ], "type": "object" } } } }, "liveness": { "reliability": null }, "verified": false, "featured": false, "provider": { "host": "evm-gas.apitoll.cloud", "manifest_name": "evm-gas.apitoll.cloud", "source": "cdp-mirror", "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources", "submitted_at": "2026-10-14T01:15:01.050Z" }, "exampleResponse": { "example": { "base_fee_gwei": 0, "base_fee_wei": "string", "block_number": 0, "caip2": "string", "chain": "ethereum", "chain_name": "string", "gas_model": "eip1559", "gas_note": "string", "stats": { "blocks_sampled": 0, "median_fullness_pct": 0, "ts": "2026-01-01T00:00:00Z" }, "tiers": { "fast": { "maxFeePerGas": "string", "maxPriorityFeePerGas": "string", "max_fee_gwei": 0, "max_priority_gwei": 0 }, "slow": { "maxFeePerGas": "string", "maxPriorityFeePerGas": "string", "max_fee_gwei": 0, "max_priority_gwei": 0 }, "standard": { "maxFeePerGas": "string", "maxPriorityFeePerGas": "string", "max_fee_gwei": 0, "max_priority_gwei": 0 } } }, "type": "string" } }