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Synapse API — Celo Gas Estimator
x402
Synapse API — Celo 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 costs for a transaction on the Celo blockchain given sender, recipient, data payload, and value
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 a gas estimate (in gas units) for the described Celo transaction, indicating approximately how much gas will be consumed if the transaction is executed with the provided parameters.
Example use cases
Pre-flight check before token transfer
“Before I send 50 CELO from 0xMyWallet to 0xFriendWallet, can you estimate how much gas that transaction will use on the Celo network?”
Smart contract call cost estimation
“I'm about to call a smart contract on Celo — the contract is at 0xContractAddress, my wallet is 0xMyAddress, and the encoded calldata is 0xa9059cbb000... Can you estimate the gas cost before I submit it?”
DeFi transaction fee budgeting
“I want to know the gas fee for a Celo DeFi swap transaction — sender is 0xMyDeFiWallet, recipient is 0xDexRouter, value is 0, and the data payload is 0x38ed1739... Please estimate the gas so I can budget the fee.”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/celo/gas/estimateWhen to prefer
Use this endpoint when you need to estimate gas costs specifically on the Celo blockchain before committing a transaction. It is purpose-built for Celo and paid per-call via x402, making it ideal for lightweight, on-demand pre-flight checks in agent workflows without requiring a full Celo node or web3 library.
Side effects
- Invalid or malformed Ethereum-style address returns a 400 error
- Malformed hex data payload causes parsing error
- Celo RPC node unavailable leads to 503 or timeout
- Insufficient input parameters may return an error or inaccurate estimate
- Transaction that would revert on-chain may return an error or inflated estimate
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| to | string | |
| data | string | |
| from | string | |
| value | string |
Tags
x402
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