Use when an agent must price, time or route a transaction. Input: optional chain...
https://1gateway.dev/v1/onchain/gasOverview
Use when an agent must price, time or route a transaction. Input: optional chain (base default, ethereum, arbitrum, monad, all). Output: JSON base fee, priority tiers (last 20 blocks), suggested maxFeePerGas, block fullness, typical cost of transfer, approve, DEX swap, mint, deploy in gas token (ETH, MON) and USD (Base adds L1 data fee); chain=all adds a compare table and the cheapest chain per action by USD. Example: ?chain=all
Protocol
x402
Price
$0.0020
Payment Asset
USD Coin
Payment Network
eip155:8453
Category
crypto/defi
Provider
1gateway
Source
bazaar
Indexed
2026-11-07 06:03:32
Health
Status
unknown
Latency (p50)
—
Uptime (30d)
—
Reliability Score
—
Last Checked
Never
Last Healthy
Never
Consecutive Failures
0
x402 Payment Validation
Payment Requirements
—
Asset Verified
—
Facilitator
—
Input Schema
{
"method": "GET",
"queryParams": {
"chain": "all"
},
"type": "http"
}
Output Schema
{
"example": {
"baseFeeGwei": 0.005,
"block": {
"gasUsedPct": 11.7,
"number": 52774276,
"timestamp": "2026-10-18T15:38:19.000Z"
},
"chain": "base",
"chainId": 8453,
"costs": [
{
"action": "eth_transfer",
"l1DataFeeEth": 7.056e-10,
"l2FeeEth": 1.26e-7,
"label": "ETH transfer",
"totalEth": 1.267e-7,
"totalUsd": 0.0003011,
"typicalGas": 21000
}
],
"ethUsd": 2376,
"nativeSymbol": "ETH",
"nextBaseFeeGwei": 0.005,
"note": "Costs use the next base fee + the standard (median 50th-percentile) tip over the last 20 blocks, plus the L1 data fee upper bound from the GasPriceOracle. Gas …",
"priorityFeeGwei": {
"fast": 0.0022,
"node": 0.001,
"slow": 0.0005001,
"standard": 0.001
},
"recentBlocks": {
"avgGasUsedPct": 8.5,
"count": 20
},
"rpc": {
"kind": "public",
"source": "base-rpc.publicnode.com"
},
"suggested": {
"fast": {
"maxFeePerGasGwei": 0.0122,
"maxPriorityFeePerGasGwei": 0.0022
},
"slow": {
"maxFeePerGasGwei": 0.0105,
"maxPriorityFeePerGasGwei": 0.0005001
},
"standard": {
"maxFeePerGasGwei": 0.011,
"maxPriorityFeePerGasGwei": 0.001
}
}
},
"type": "json"
}