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Synapse API — BNB Chain Gas Estimator
x402
Synapse API — BNB Chain Gas Estimator is a paid API for AI agents from synapse-api-brown.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Estimates gas costs for a transaction on the BNB Smart Chain network given transaction parameters
Price / call$0.01
Success—
StatusUnknown
How this service works
High-speed API suite for AI processing, web scraping, and smart data utilities across 57+ blockchain networks. Pay-per-call via x402.
Output
Returns an estimated gas amount (in gas units) for the described BNB Smart Chain transaction, allowing callers to set appropriate gas limits and calculate total transaction costs before submission.
Example use cases
Pre-flight check for BNB transfer
“Before I send 1 BNB from my wallet 0xAbC...123 to 0xDeF...456, can you estimate how much gas I'll need so I know if I have enough for fees?”
Smart contract call gas estimate
“I'm about to call a smart contract on BNB Smart Chain — the contract is at 0xContractAddr, the calldata is 0xa9059cbb000...abc, and I'm calling from 0xMyWallet. What's the estimated gas cost?”
DeFi swap cost estimation
“Can you estimate the gas for a swap transaction on BSC? Sender is 0xUser123, recipient is 0xRouterContract, value is 0, and the encoded swap data is 0x38ed1739...”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/bnb/gas/estimateWhen to prefer
Use this endpoint when you need a quick, pay-per-call gas estimate for a BNB Smart Chain (BSC) transaction without running your own BNB node or RPC infrastructure. Ideal for agents that need to pre-flight a transaction cost check before executing on-chain, or for wallets and DeFi tools that need to set gas limits dynamically.
Side effects
- Invalid or malformed Ethereum-style address for 'to' or 'from' fields returns an error
- Malformed hex data in 'data' field may cause estimation failure
- Transaction that would revert on-chain may return an estimation error or revert message
- Network unavailability or RPC issues may result in timeout or 500 error
- Missing required fields may return a validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| to | string | |
| data | string | |
| from | string | |
| value | string |
Tags
x402
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