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Synapse API — Worldchain Gas Estimator
x402
Synapse API — Worldchain 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 Worldchain 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 a gas estimate (in gas units) for the proposed transaction on the Worldchain network, allowing the caller to understand expected fees before broadcasting the transaction.
Example use cases
Pre-flight check before DeFi swap
“Before I submit this swap on Worldchain, estimate the gas cost for a transaction from 0xMyWallet to the DEX contract 0xDEX123 with calldata 0xa9059cbb and value 0.0.”
Smart contract deployment cost preview
“Can you estimate how much gas it'll take to deploy my contract on Worldchain? The sender is 0xDev123, destination is null, and here's the bytecode data: 0x608060405234...”
NFT mint gas estimation
“How much gas will it cost to mint an NFT on Worldchain? From address 0xMinter99 to contract 0xNFTContract, value 0, calldata 0x1249c58b.”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/worldchain/gas/estimateWhen to prefer
Choose this endpoint when you need a gas estimate specifically on the Worldchain network before committing to a transaction. It is ideal for pre-flight checks in DeFi workflows, NFT mints, or any smart contract interaction on Worldchain where cost predictability matters before signing and broadcasting.
Side effects
- Invalid address format in 'to' or 'from' fields returns a validation error
- Malformed or invalid 'data' hex string causes a parsing error
- Transaction simulation failure if the contract reverts during estimation
- Network congestion or RPC node unavailability may cause timeouts
- Missing required fields may return a 400 bad request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| to | string | |
| data | string | |
| from | string | |
| value | string |
Tags
x402
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