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Basebuilder2 Crypto Gas Estimate
x402
Basebuilder2 Crypto Gas Estimate is a paid API for AI agents from bbx-crypto.vercel.app, paid per call via x402, $0.074561/call, status unknown (last checked 2026-10-13).
Estimates blockchain gas fees for a given transaction or network, returning cost projections in crypto units
Price / call$0.074561
Success—
StatusUnknown
How this service works
BaseBuilder Crypto API hub - 26 paid endpoints
Output
Returns a gas cost estimate including base fee, priority fee (miner tip), estimated total gas in gwei, and projected transaction cost in ETH and/or USD, typically broken down by confirmation speed tier (slow/standard/fast).
Example use cases
Pre-flight transaction cost check
“Before I submit this ERC-20 token transfer on Base mainnet, estimate the gas cost so I know if it's worth doing at current network prices.”
Smart contract deployment budget
“I'm about to deploy a new smart contract on Ethereum — can you estimate the gas fees I should expect so I can plan my budget?”
DeFi swap cost evaluation
“I want to swap USDC for ETH on Ethereum mainnet — estimate the gas fees for this swap so I can decide if the trade is profitable after costs.”
Technical details
Endpoint
POSThttps://bbx-crypto.vercel.app/api/gas-estimate?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, paid gas estimation without running your own blockchain node, especially on Base or Ethereum networks. Prefer this over free public estimators when reliability and uptime guarantees matter, or when integrating into an automated payment or transaction workflow that requires programmatic access.
Side effects
- Invalid or unsupported chain ID returns 400 error
- Missing required transaction parameters returns validation error
- Network congestion or RPC node unavailability causes timeout
- Malformed contract address returns parsing error
- Insufficient metadata to estimate complex contract interactions
Tags
x402
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