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Synapse API — Mantle Gas Estimator
x402
Synapse API — Mantle 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 Mantle blockchain network given sender, recipient, data, 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 transaction on the Mantle network, allowing the caller to set appropriate gas limits before broadcasting a transaction.
Example use cases
Pre-flight check before token transfer
“Before I send this ERC-20 transfer on Mantle, estimate the gas cost — from address 0xSender123 to 0xRecipient456, calldata is 0xa9059cbb000000000000000000000000recipient, value is 0.”
Smart contract deployment cost estimate
“I'm about to deploy a smart contract on Mantle — can you estimate the gas it will use? The deployer is 0xDeploy789, no recipient, and the bytecode data starts with 0x6080604052...”
DeFi swap gas estimation on Mantle
“I want to do a token swap on a Mantle DEX — estimate the gas for this call from 0xMyWallet to 0xDexRouter with this swap calldata 0x38ed1739... and value 0.01 ETH.”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/mantle/gas/estimateWhen to prefer
Choose this endpoint when you need a fast, pay-per-call gas estimate specifically for the Mantle L2 network without managing your own RPC node. Ideal when building agents that need pre-flight cost validation before submitting transactions on Mantle, or when you want a lightweight serverless gas oracle without provisioning infrastructure.
Side effects
- Invalid or malformed address in 'to' or 'from' fields — returns error or rejects request
- Invalid calldata hex string causes estimation failure
- Transaction would revert on-chain — gas estimation may fail or return an error indicating revert
- Network connectivity issues to Mantle RPC nodes — timeout or 503 error
- Missing required fields result in 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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