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HTTPay L2 Gas Costs API
x402
HTTPay L2 Gas Costs API is a paid API for AI agents from httpay.xyz, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).
Returns real-time gas costs in USD across 7 Layer 2 blockchain networks
Price / call$0.05
Success—
StatusUnknown
How this service works
Real-time gas costs across 7 L2s in USD
Output
A JSON object containing real-time gas costs denominated in USD for 7 different L2 blockchain networks, allowing comparison of transaction fees across chains at the moment of the request.
Example use cases
Example prompt
“What are the current gas fees in USD across all 7 Layer 2 networks right now — I want to know which L2 is cheapest before I submit my transaction?”
Technical details
Endpoint
POSThttps://httpay.xyz/api/l2-costsWhen to prefer
Use this endpoint when you need a quick, up-to-date snapshot of transaction costs across multiple L2 networks in a single call, especially when deciding which chain to use for a DeFi operation or cross-chain transfer. Ideal for agents that need to optimize gas spend without subscribing to a dedicated gas oracle service — pay only $0.05 per call with no API key required.
Side effects
- Payment required (402) if USDC micropayment not included
- Network timeout if L2 RPC nodes are slow to respond
- Stale data if upstream gas oracles are lagging
- Empty or partial results if some L2 networks are temporarily unreachable
Input
{}Output
{
"meta": {
"x402": true,
"poweredBy": "Alfred Zhang 🫡"
},
"chains": [
{
"ok": false,
"name": "Ethereum",
"costs": {
"swap": "$0.000000",
"nftMint": "$0.000000",
"ethTransfer": "$0.000000",
"erc20Transfer": "$0.000000"
},
"chainId": 1,
"gasPriceGwei": "0.0000"
},
{
"ok": true,
"name": "Base",
"costs": {
"swap": "$0.002012",
"nftMint": "$0.001509",
"ethTransfer": "$0.000211",
"erc20Transfer": "$0.000503"
},
"chainId": 8453,
"gasPriceGwei": "0.0060"
},
{
"ok": true,
"name": "Optimism",
"costs": {
"swap": "$0.000335",
"nftMint": "$0.000252",
"ethTransfer": "$0.000035",
"erc20Transfer": "$0.000084"
},
"chainId": 10,
"gasPriceGwei": "0.0010"
},
{
"ok": true,
"name": "Arbitrum One",
"costs": {
"swap": "$0.006707",
"nftMint": "$0.005030",
"ethTransfer": "$0.000704",
"erc20Transfer": "$0.001677"
},
"chainId": 42161,
"gasPriceGwei": "0.0200"
},
{
"ok": true,
"name": "zkSync Era",
"costs": {
"swap": "$0.015175",
"nftMint": "$0.011381",
"ethTransfer": "$0.001593",
"erc20Transfer": "$0.003794"
},
"chainId": 324,
"gasPriceGwei": "0.0452"
},
{
"ok": true,
"name": "Linea",
"costs": {
"swap": "$0.014053",
"nftMint": "$0.010540",
"ethTransfer": "$0.001476",
"erc20Transfer": "$0.003513"
},
"chainId": 59144,
"gasPriceGwei": "0.0419"
},
{
"ok": true,
"name": "Polygon zkEVM",
"costs": {
"swap": "$0.003354",
"nftMint": "$0.002515",
"ethTransfer": "$0.000352",
"erc20Transfer": "$0.000838"
},
"chainId": 1101,
"gasPriceGwei": "0.0100"
}
],
"ethUsd": 1676.83,
"updatedAt": "2026-06-12T04:38:05.256Z"
}Schema · Response
{
"type": "json",
"example": {
"description": "Real-time gas costs across 7 L2s in USD"
}
}Tags
x402
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