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Synapse API — Bob Gas Estimator
x402
Synapse API — Bob 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 2026-10-16).
Estimates the gas cost for a blockchain transaction on the Bob network 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 an estimated gas amount (in gas units) required to execute the specified transaction on the Bob network, enabling callers to budget fees before broadcasting the transaction.
Example use cases
Pre-flight gas check for ETH transfer
“Before I send 0.5 ETH from my wallet 0xAAA...111 to 0xBBB...222 on the Bob network, can you estimate how much gas it will cost so I know if I have enough to cover fees?”
Smart contract call cost estimation
“I want to call a smart contract at 0xContract...123 on Bob — the calldata is 0xa9059cbb...000 and I'm sending from 0xMywallet...456 with 0 ETH value. What's the gas estimate?”
Budget planning for batch transactions
“I'm planning to run several transactions on Bob and need to budget for gas. Can you estimate the gas for a transaction from 0xSender...789 to 0xReceiver...321 with a value of 0.01 ETH and data 0x?”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/bob/gas/estimate?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, pay-per-call gas estimate specifically for the Bob network without maintaining your own RPC node or paying for a full node provider subscription. Ideal for agents that need on-demand, lightweight fee estimation before submitting transactions.
Side effects
- Invalid or malformed Ethereum address in 'to' or 'from' fields returns an error
- Invalid hex string in 'data' field causes a parse error
- Network unavailability or RPC timeout results in a failure response
- Unsupported transaction type or out-of-range value may cause estimation failure
- Missing required fields may return a validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| to | string | |
| data | string | |
| from | string | |
| value | string |
Tags
x402
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