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Synapse API — Sonic Gas Estimator
x402
Synapse API — Sonic 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 2026-09-15).
Estimates gas cost for a transaction on the Sonic blockchain network before sending it
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 transaction on the Sonic network, allowing the caller to assess fees and decide whether to proceed with submission.
Example use cases
Pre-flight DeFi swap gas check
“Before I submit this token swap on Sonic, estimate the gas — sender is 0x1234...abcd, recipient contract is 0x5678...ef01, calldata is 0x38ed1739..., and value is 0.”
Smart contract deployment cost preview
“Can you estimate how much gas it'll cost to deploy my contract on Sonic? From address 0xAAAA...1111, no recipient (contract creation), here's the bytecode: 0x6080604052...”
Safe transaction fee validation
“I want to know the gas estimate for sending 1 ETH on Sonic from 0xBBBB...2222 to 0xCCCC...3333 with no calldata — just a plain transfer.”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/sonic/gas/estimateWhen to prefer
Use this endpoint when you specifically need gas estimation on the Sonic blockchain network (not Ethereum mainnet or other EVM chains). It is appropriate when you want a pre-flight fee check before executing a transaction, to avoid overpaying or having transactions fail due to insufficient gas. Prefer this over generic Ethereum gas estimators when your transaction targets the Sonic network.
Side effects
- Invalid or malformed address in 'to' or 'from' fields returns an error
- Invalid hex data in the 'data' field causes parsing failure
- Sonic network node unavailability leads to timeout or 503 error
- Missing required fields may return a validation error
- Simulated transaction that would revert may return an error or revert reason
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| to | string | |
| data | string | |
| from | string | |
| value | string |
Tags
x402
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