Blockchain Gas Price Data services

Estimate the gas a transaction will consume via eth_estimateGas before signing it

Real-time gas price oracle for multiple EVM chains. Returns slow/standard/fast fee estimates, estimated transaction costs (ETH transfers, ERC-20 transfers, swaps), and network congestion status. Supports Base, Ethereum, Arbitrum, and Optimism.

Current gas prices on Ethereum mainnet and Base — base fee, priority fee, and EIP-1559 estimates in Gwei as JSON. No API key required. Use for: gas fee check before transacting, transaction cost estimation, L1 vs L2 fee comparison, onchain timing. $0.001 USDC per call.

Live EVM gas oracle. Returns latest block baseFeePerGas + slow/standard/fast tiers derived from priority-fee percentiles (p25/p50/p75) over the trailing 4 blocks, plus a 21,000-gas transfer cost estimate in the chain native unit. Chains: base, ethereum, polygon, arbitrum, optimism. Real-time post-training data, ~5s freshness.

Natural gas spot price — Henry Hub rate for energy market exposure and commodity inflation — Ed25519 signed attestation

Get gas price estimates across multiple EVM chains with USD cost

Base Gas Price Staleness: Base Gas Price Staleness checks the age of a caller-supplied gas quote before use from bounded caller-supplied values without an external provider. Call Base Gas Price Staleness before signing, submitting, replacing, or accepting an EVM/Base transaction assembled from caller-owned data. Returns normalized transaction evidence, calculated budget or shape findings, and a fail-closed preflight status for Base Gas Price Staleness as versioned deterministic JSON. Price: $0.…

Sum gas + bridge fee + slippage budget into total cost. Call when comparing bridge routes with known component costs. Returns total_cost and components as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.

US energy benchmark prices from the EIA (Energy Information Administration) open data API. Omit series for a one-call snapshot of the latest value of every benchmark; pass series for its recent time series (newest first). Benchmarks: wti_crude / brent_crude ($/barrel), henry_hub_gas ($/MMBtu), gasoline_regular / diesel ($/gallon), electricity_retail (cents/kWh). Each observation has date, value, units, and frequency. Public-domain US government data.

Current gas prices for Base or Ethereum mainnet: legacy gas price, EIP-1559 base fee and suggested priority fee (all gwei), plus the latest block number. Query: chain (base | ethereum, default base). Real-time from public RPC. Use to time on-chain transactions, estimate costs, and monitor fee spikes.

Current Base gas prices and a simple-transfer cost estimate for transaction planning.

Get current gas prices for an EVM chain. Returns safe, proposed, and fast gas prices in Gwei plus the base fee. Useful for agents deciding whether to execute a transaction now or wait.

Ethereum gas price oracle. Current base fee and EIP-1559 priority-fee estimates (slow/standard/fast) in gwei.

Live network gas prices (slow / average / fast, in gwei) for any chain — the pre-transaction read every trading, sniping, and settlement agent makes before sending a tx to size the fee. Across Base, Ethereum, Optimism, Arbitrum, Polygon, Gnosis. Free upstream (Blockscout); one paid call instead of running your own RPC.

Live network gas prices (slow / average / fast, in gwei) for any chain — the pre-transaction read every trading, sniping, and settlement agent makes before sending a tx to size the fee. Across Base, Ethereum, Optimism, Arbitrum, Polygon, Gnosis. Free upstream (Blockscout); one paid call instead of running your own RPC.

Estimate the gas a transaction will use via eth_estimateGas — the pre-send read every tx-building, trading and settlement agent makes to size gas and avoid out-of-gas reverts. Pass from/to/value/data. Across Base, Ethereum, Optimism, Arbitrum, Polygon, Gnosis. Free public RPC; undercuts onesource at $0.001 on 6 chains.

Estimate the gas a transaction will use via eth_estimateGas — the pre-send read every tx-building, trading and settlement agent makes to size gas and avoid out-of-gas reverts. Pass from/to/value/data. Across Base, Ethereum, Optimism, Arbitrum, Polygon, Gnosis. Free public RPC; undercuts onesource at $0.001 on 6 chains.

Single-fact: what does Ethereum mainnet gas cost RIGHT NOW? Returns the latest block’s base fee + blob base fee AND the consensus-computed next-block projection (not a guess — the protocol’s own EIP-1559/4844 arithmetic), straight from eth_feeHistory. Fields: {block, base_fee_gwei, blob_base_fee_gwei, gas_used_ratio, next_base_fee_gwei, next_blob_base_fee_gwei}. Bulk per-block history: /v1/premium/fee-history.csv ($0.05, up to 1024 blocks/call).

Near-real-time pump prices (EUR/L) for French gas stations from the official roulez-eco feed (data.economie.gouv.fr, updated continuously). Query: ?dept=75 (departement code) and/or ?city=Lyon, optional &fuel=gazole|sp95|sp98|e10|e85|gplc to sort cheapest-first and drop stations without that fuel, &limit=10 (1-40). Returns per station: address, lat/lon, per-fuel price with update timestamp, 24/7 automat flag. Cached 10 min.

Live Ethereum mainnet gas pricing from PublicNode RPC: next-block base fee, 25/50/75th-percentile priority tips over the last 5 blocks (slow/std/fast), and a ready-to-sign recommendation (max_fee = 2*base + tip). Query: ?speed=slow|std|fast (default std). All values are decimal gwei, no hex parsing needed. 30s cache.

Read-only Base L2 gas conditions computed directly from chain data: current base fee, recent percentiles, realised volatility, congestion state, and an 80% forecast range for a chosen horizon. This is supporting context for timing a transaction, not a trade instruction. Every figure is reproducible from public Base RPC data.

Base gas oracle / Base gas price API / Base L2 gas fee tracker / real-time gas estimator / swap cost estimator. Returns the current Base fee, fast/standard/slow priority tiers, the USD cost of a typical swap, and a congestion recommendation. For AI agents, trading bots, and wallets timing transactions on Base to minimize gas.

Arbitrum L2 gas price — current transaction fee for Arbitrum One network — Ed25519 signed attestation

Ethereum mainnet gas price — current base fee and priority fee for ETH transaction cost estimation — Ed25519 signed attestation