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Synapse API — Solana Gas Estimator
x402
Synapse API — Solana 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 (transaction fee) cost for a given Solana transaction before it is submitted to the network
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/fee cost for the described Solana transaction, allowing the caller to understand the network cost before submitting. Typically includes fee amounts in SOL or lamports.
Example use cases
Pre-flight fee check before token transfer
“I want to send 100 USDC on Solana from my wallet 7xKqABC... to my friend's wallet 9mPrXYZ... — can you estimate the transaction fee before I actually send it?”
DeFi swap cost estimation
“I'm about to execute a swap on a Solana DEX. My wallet is 7xKqABC..., the contract address is 9mPrXYZ..., and the calldata is 0xdeadbeef01. What's the estimated gas fee so I know if it's worth doing right now?”
Budget planning for bulk Solana transactions
“I'm planning to send a batch of NFT transfers on Solana from address 7xKqABC.... Can you estimate the gas cost for one transaction with data 0xabcdef and value 0 SOL so I can project total fees across 500 transfers?”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/solana/gas/estimate?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, pay-per-call Solana gas estimate without managing your own RPC node or paying for a subscription plan. It is well-suited for agents or apps that only occasionally need fee estimation and want to avoid standing infrastructure costs. Prefer it over raw RPC calls when you want a simple REST interface abstracted from Solana's native API.
Side effects
- Invalid or malformed wallet address returns a 400 error
- Missing required fields (e.g. no 'to' or 'from') results in validation error
- Network connectivity issues to Solana RPC may cause timeout or 503
- Malformed transaction data string may result in parse error
- Payment not included or insufficient USDC returns 402
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| to | string | |
| data | string | |
| from | string | |
| value | string |
Tags
x402
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