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Biosfera Gas Now — EVM Chain Gas Price Oracle
x402
Biosfera Gas Now — EVM Chain Gas Price Oracle is a paid API for AI agents from biosfera.46-62-215-147.sslip.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-28).
Returns current gas prices (legacy price, base fee, priority fee) in gwei for Base, Ethereum, Arbitrum, Optimism, or Polygon, along with the reference block number.
Price / call$0.001
Success—
StatusUnknown
How this service works
Use when you need current gas prices on Base, Ethereum, Arbitrum, Optimism or Polygon before sending a transaction: legacy gas price, latest base fee and suggested priority fee in gwei, plus the block they refer to.
Output
Returns current gas pricing data for the requested EVM chain: legacy gas price in gwei, latest base fee in gwei, suggested priority fee (miner tip) in gwei, and the block number these values correspond to.
Example use cases
Pre-transaction gas check on Ethereum
“What's the current base fee and suggested priority fee on Ethereum mainnet right now? I want to know what gas to set before submitting my transfer.”
Gas cost monitoring on Polygon
“Check the current gas price on Polygon for me — I need the legacy gas price and the latest base fee in gwei so I can decide whether to wait or send now.”
Multi-chain gas comparison for DeFi bot
“Pull the current gas prices on Arbitrum and Optimism — I need the base fee and priority fee in gwei for each so my bot can pick the cheaper chain to execute on.”
Technical details
Endpoint
GEThttps://biosfera.46-62-215-147.sslip.io/o/gas-now?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need real-time EVM gas prices across major chains (Base, Ethereum, Arbitrum, Optimism, Polygon) before submitting a transaction. Prefer it over on-chain calls when you want a quick REST API lookup without running your own node or RPC integration. It provides both EIP-1559 (base fee + priority fee) and legacy gas price in a single call, making it ideal for transaction fee estimation in wallets, bots, and DeFi automation.
Side effects
- Invalid or unsupported chain value returns an error (only base, ethereum, arbitrum, optimism, polygon are accepted)
- Missing required 'chain' query parameter returns a validation error
- Network connectivity issues to the RPC provider may return a timeout or 503
- Stale data if the underlying RPC node is lagging behind the chain tip
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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