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Synapse Gas Price API
x402
Synapse Gas Price API is a paid API for AI agents from anibalb.duckdns.org, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-31).
Returns the current Ethereum/Base network gas price in Gwei, paid per call via x402 micropayment in USDC
Price / call$0.001
Success—
StatusUnknown
How this service works
Public data and utility APIs paid per call in USDC on Base (x402). No accounts, no API keys. 174 routes: crypto/equity data, onchain reads, DNS/email/security intel, geo/weather, x402 payment diagnostics, dev utilities and more.
Output
Returns a JSON object with the current network gas price expressed in Gwei (e.g. {"gas_gwei": 15}), reflecting live on-chain fee conditions on the Base/Ethereum network.
Example use cases
Pre-transaction gas check
“Before I submit this on-chain transaction, can you check what the current gas price is in Gwei so I can estimate the fee?”
Gas price monitoring for DeFi bot
“My trading bot needs to know the current Base network gas price before deciding whether to execute a swap — can you fetch that now?”
Wallet dashboard gas display
“Show me the current gas price in Gwei so I can display it on my wallet dashboard for users about to send a transfer.”
Technical details
Endpoint
GEThttps://anibalb.duckdns.org/x402/gas-price?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, no-account, no-API-key gas price lookup paid for with a tiny USDC micropayment via x402. Ideal for agents that need on-demand gas price data without committing to a subscription service. Best for Base/Ethereum ecosystem checks prior to transaction submission.
Side effects
- Network or RPC node unavailability may return an error or stale value
- x402 payment failure (insufficient USDC balance or misconfigured payment header) results in a 402 response before data is returned
- Dynamic DNS hostname (duckdns.org) may be temporarily unreachable if the host machine is offline
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"gas_gwei": 15
}
}Tags
x402
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