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Synapse API — Abstract Gas Estimator
x402
Synapse API — Abstract 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 2026-10-11).
Estimates the gas cost for a transaction on Abstract (or supported EVM-compatible) blockchain networks given transaction parameters
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, allowing the caller to anticipate fees before broadcasting to the network
Example use cases
Pre-flight smart contract call check
“Before I submit this contract interaction, can you estimate the gas cost? The sender is 0x1234...abcd, the contract address is 0xdead...beef, and the calldata is 0xa9059cbb0000...”
Token transfer cost preview
“How much gas will it take to transfer tokens from my wallet 0xAAA...111 to 0xBBB...222 with value 1000000000000000000 and no extra calldata?”
DeFi transaction budget planning
“I'm about to call a DeFi protocol at 0xUniswap...addr from 0xMyWallet...addr with this swap calldata 0x38ed1739..., can you estimate the gas so I know if I have enough?”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/abstract/gas/estimate?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, pay-per-call gas estimate for Abstract network (or compatible EVM chain) transactions without provisioning your own RPC infrastructure. Particularly useful for agents that need pre-flight cost checks before executing on-chain actions.
Side effects
- Invalid or malformed address in 'to' or 'from' fields returns a validation error
- Malformed or non-hex calldata in 'data' field causes a parse error
- Network unavailability or RPC node failure returns a 503 or timeout
- Transaction simulation reverts (e.g. insufficient balance, bad calldata) may return an error or revert reason
- 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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