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Synapse API — Citrea Gas Estimator
x402
Synapse API — Citrea 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 2026-10-12).
Estimates the gas cost for a transaction on the Citrea blockchain network before submission
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 units figure for the described Citrea transaction, allowing callers to predict fees before broadcasting to the network. Typically includes a numeric gas estimate (e.g. in units of gas) that can be combined with current gas price to derive total cost.
Example use cases
Pre-flight smart contract call check
“I want to call a smart contract on Citrea — the contract is at 0xDef...456, my wallet is 0xAbc...123, and the encoded calldata is 0xa9059cbb0000...0001. Can you estimate the gas before I actually submit the transaction?”
ETH transfer gas estimation on Citrea
“How much gas would it cost to send 0.05 ETH from 0xSender...111 to 0xReceiver...222 on the Citrea network? I want to know before committing.”
DApp transaction cost budgeting
“My app is about to batch transactions on Citrea — can you estimate the gas for a transaction from 0xMyWallet...333 to 0xContract...444 with data 0xabcdef00 and value 0 so I can budget the fees?”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/citrea/gas/estimate?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a gas estimate specifically on the Citrea network (a Bitcoin-rollup EVM chain) before submitting a transaction. Prefer this over generic Ethereum gas estimators when your transaction targets Citrea's specific chain environment. Ideal for pre-flight cost checks in dApps, wallets, or automated agents managing Citrea transactions.
Side effects
- Invalid or malformed address in 'to' or 'from' fields returns a 400 error
- Malformed hex data in the 'data' field causes parsing failure
- Network unavailability of Citrea RPC node results in a 503 or timeout
- Invalid value format (non-hex or non-numeric string) causes validation error
- Transactions that would revert on-chain may return an error or revert reason rather than a gas estimate
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| to | string | |
| data | string | |
| from | string | |
| value | string |
Tags
x402
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