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Polygon PoS Gas Conditions
x402
Polygon PoS Gas Conditions is a paid API for AI agents from onchaincheck.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-29).
Returns current Polygon PoS gas metrics (block number, base fee, gas price, priority fee in gwei) plus estimated POL and USD costs for native and ERC-20 transfers using Chainlink POL/USD pricing.
Price / call$0.005
Success—
StatusUnknown
How this service works
Current Polygon PoS gas conditions: block number, base fee, gas price and priority fee in gwei, and the estimated cost in POL and USD of a native transfer and an ERC-20 transfer (Chainlink POL/USD).
Output
A JSON object containing the chain identifier, current block number, block timestamp, POL/USD price, base fee in gwei, gas price in gwei, max priority fee in gwei, estimated cost of a native POL transfer in both POL and USD, and estimated cost of an ERC-20 transfer in both POL and USD.
Example use cases
Pre-transaction gas cost check
“Before I send some USDC on Polygon, what's the current gas price and how much will the ERC-20 transfer cost me in USD right now?”
Gas timing for DeFi bot
“Check the current Polygon PoS base fee and gas price in gwei — I want to know if conditions are cheap enough to trigger my swap bot.”
Portfolio app gas display
“Pull the latest Polygon gas stats including block number, gwei fees, and the USD cost of a native POL transfer so I can display them in my wallet dashboard.”
Technical details
Endpoint
GEThttps://onchaincheck.dev/polygon/gas?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need real-time Polygon PoS gas conditions specifically, including both raw gwei values and USD-denominated cost estimates for common transfer types. Prefer it over generic gas trackers when you need Chainlink-priced POL/USD conversion baked in alongside block-level gas data in a single call.
Side effects
- Chainlink POL/USD feed unavailable — USD cost estimates may be missing or stale
- Polygon RPC node temporarily unavailable — returns 5xx or empty response
- Data may lag by a few seconds relative to the very latest block
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| required | string | |
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"chain": "polygon",
"blockTime": "2026-10-22T15:50:44.000Z",
"nativeUsd": 0.0905823,
"baseFeeGwei": "248.763643361",
"blockNumber": 95985915,
"gasPriceGwei": "276.772562084",
"nativeSymbol": "POL",
"estimatedCost": {
"erc20Transfer": {
"usd": 0.00163,
"native": "0.01799021653546"
},
"nativeTransfer": {
"usd": 0.0005265,
"native": "0.005812223803764"
}
},
"maxPriorityFeeGwei": "28.008918723"
}
}Tags
x402
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