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BlockRun.AI Gas Price
x402
BlockRun.AI Gas Price is a paid API for AI agents from blockrun.ai, paid per call via x402, $0.0075/call, status unknown (last checked 2026-09-16).
Returns the current gas price for a specified blockchain network.
Price / call$0.0075
Success—
StatusUnknown
How this service works
Pay for the outcome. One endpoint for every model, tool and data source an agent needs — each call priced before it runs, at the best value per dollar. 103 models and 100 data and tool APIs.
Output
Returns the current gas price for the specified blockchain chain, likely including values such as base fee, priority fee, or gas price in gwei or native units.
Example use cases
Real-time fee optimization for DEX swaps
“Before I execute this token swap, can you check what gas fees are like on Polygon right now so I know if it's a good time to trade?”
Multi-chain transaction cost comparison
“I need to bridge my assets across chains — compare the current gas prices on Ethereum, Arbitrum, and Base so I can pick the cheapest option.”
User-facing gas fee transparency widget
“Show me the live gas fees across all the major chains we support so our users can see network congestion levels before they initiate transactions.”
Technical details
Endpoint
GEThttps://blockrun.ai/api/v1/surf/onchain/gas-priceWhen to prefer
Use this endpoint when you need real-time gas price data for a specific blockchain network to estimate transaction costs, optimize timing of on-chain transactions, or surface fee information to users in a DeFi or Web3 application.
Side effects
- Unsupported or unrecognized chain value returns an error
- Missing required 'chain' query parameter returns a 400 bad request
- Network or upstream data provider outage returns 5xx
- Payment not completed or invalid x402 payment header returns 402
Input
{
"chain": "ethereum"
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| chain | string | Required query param |
Output
{
"data": {
"chain": "ethereum",
"gas_price": "120636533",
"gas_price_gwei": 0.120636533
},
"meta": {
"cached": false,
"credits_used": 1
},
"$schema": "https://api.asksurf.ai/schemas/DataObjectResponseOnchainGasPriceItem.json"
}Tags
x402
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