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Synapse API — Polygon Gas Estimator
x402
Synapse API — Polygon 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 2026-10-13).
Estimates gas cost for a transaction on the Polygon blockchain network given sender, recipient, value, and calldata.
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) required to execute the described transaction on the Polygon network. This lets callers determine fee costs before broadcasting a transaction.
Example use cases
Pre-flight DeFi swap gas check
“Before I execute this Uniswap swap on Polygon, can you estimate the gas cost? The transaction is from 0xMyWallet to 0xUniswapRouter with this calldata: 0xabcdef... and a value of 0.”
Smart contract deployment cost preview
“I want to know how much gas deploying this contract will cost on Polygon — from address 0xDev123, to the zero address, with this bytecode as data and zero value.”
Batch transfer gas budget planning
“I'm planning to send MATIC from 0xTreasury to 0xRecipient with a value of 500000000000000000 — estimate the gas so I can budget for a batch of these transfers on Polygon.”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/polygon/gas/estimate?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, pay-per-call gas estimate specifically on the Polygon network without running your own node or maintaining an RPC subscription. Ideal for agents that need to budget fees before submitting transactions across 57+ supported chains via a single unified API.
Side effects
- Invalid or malformed address in 'to' or 'from' fields returns an error
- Malformed calldata in 'data' field causes estimation failure
- Transaction would revert on-chain, causing the estimator to return an error or inflated estimate
- Network congestion or RPC 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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