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Gas Price Tracker
x402
Gas Price Tracker is a paid API for AI agents from x402-seller-pmlm.onrender.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-12).
Returns live base fees, priority fee tiers, max fees, block congestion, and USD transaction cost estimates for Ethereum, Base, Arbitrum, Polygon, and Solana in a single call.
Price / call$0.002
Success—
StatusUnknown
How this service works
Gas price: live gas fees for Ethereum, Base, Arbitrum, Polygon and Solana in one call. Use before sending a transaction to pick a fee or the cheapest chain. Returns base fee, slow/standard/fast priority fees, max fee, congestion, and the USD cost of a transfer, an ERC-20 transfer and a swap per chain, plus Solana priority fees. Optional chain. 0.002 USDC/call; failed calls are free.
Output
A JSON object containing an array of chain entries, each with baseFeeGwei, priorityFeeGwei tiers (slow/standard/fast), maxFee, block congestion level, and estimated USD costs for a native transfer, ERC-20 transfer, and swap. Also includes a generatedAt timestamp and the identifier of the cheapest EVM chain for ERC-20 transfers.
Example use cases
Cheapest chain for token swap
“I want to do a token swap but gas fees are killing me — which chain is cheapest right now, and how much would the swap cost in USD on Base, Arbitrum, and Polygon?”
Pre-trade gas cost check
“Before I submit this ERC-20 transfer, tell me the current standard gas price on Ethereum in Gwei and what the USD cost of that transfer will be.”
Real-time gas dashboard for all chains
“Give me a live gas price snapshot across all supported chains — Ethereum, Base, Arbitrum, Polygon, and Solana — with base fee, priority tiers, and which one is the cheapest for an ERC-20 transfer right now.”
Technical details
Endpoint
GEThttps://x402-seller-pmlm.onrender.com/gas?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a single API call to compare real-time gas fees across multiple chains simultaneously, including USD cost estimates for common transaction types (transfer, ERC-20, swap) and an automatic cheapest-chain recommendation. Prefer this over chain-specific RPC calls when you need multi-chain aggregation without managing multiple node connections.
Side effects
- 400 Bad Request — invalid chain parameter value supplied
- 422 Unprocessable Entity — chain node unreachable or no data found for the requested chain
- 503 Service Unavailable — server is busy; retry after a short delay
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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