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Base Network Gas Price Oracle
x402
Base Network Gas Price Oracle is a paid API for AI agents from kr-x402-mvp.kgy5612.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-31).
Returns current Base L2 gas prices (slow/standard/fast tiers) with USD cost estimates, congestion level, and EIP-1559 fee fields for a given gas limit
Price / call$0.001
Success—
StatusUnknown
How this service works
Pay-per-call crypto microdata for trading/onchain AI agents via x402 (USDC on Base): Base gas, token risk, balances, multi-venue prices, Hyperliquid book/funding, kimchi premium. No API keys.
Output
A JSON object with the current Base block number, gas price in gwei and wei hex, EIP-1559 base fee, slow/standard/fast tier objects each containing max_fee_gwei, max_priority_fee_gwei, and est_cost_usd, a congestion score (0–1), the recommended tier string, tx_fields ready to use in an ethers.js/viem transaction, and an updated_at timestamp.
Example use cases
Optimize transaction gas before swap
“Before I submit this DEX swap on Base, check current gas prices and tell me if it's worth waiting — show me the slow, standard, and fast tiers with USD costs.”
Estimate gas cost for NFT mint
“I'm about to mint an NFT on Base that costs about 150000 gas — what would that cost me right now in USD at the standard gas tier?”
Monitor Base congestion for bot timing
“Is the Base network congested right now? Give me the current congestion score and the recommended gas tier so I can decide when to fire my onchain transaction.”
Technical details
Endpoint
GEThttps://kr-x402-mvp.kgy5612.workers.dev/api/gas-price?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your agent needs real-time Base L2 gas data without setting up an API key or RPC subscription — it pays per call via x402/USDC. Prefer it over raw RPC calls when you need pre-tiered slow/standard/fast estimates with USD costs already computed, EIP-1559 fields pre-formatted, and a congestion score in a single response. It is specifically useful for trading and onchain agents on Base that need to budget transaction costs or decide optimal timing.
Side effects
- Base RPC node unavailable — upstream timeout or 5xx returned
- Invalid gas_limit value outside 21000–30000000 range — 400 validation error
- x402 payment not completed — 402 Payment Required returned before data is served
- Stale data if Base RPC is lagging — updated_at timestamp may be behind real-time
- Network congestion causing slow response from Base mainnet RPC
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"block": 37000000,
"chain": "base",
"tiers": {
"fast": {
"est_cost_usd": 0.0007,
"max_fee_gwei": 0.025,
"max_priority_fee_gwei": 0.01
},
"slow": {
"est_cost_usd": 0.0005,
"max_fee_gwei": 0.006,
"max_priority_fee_gwei": 0.001
},
"standard": {
"est_cost_usd": 0.0005,
"max_fee_gwei": 0.011,
"max_priority_fee_gwei": 0.001
}
},
"sources": [
"https://mainnet.base.org"
],
"chain_id": 8453,
"tx_fields": {
"gas": "0x5208",
"type": "0x2",
"maxFeePerGas": "0xa7d8c0",
"maxPriorityFeePerGas": "0xf4240"
},
"congestion": 0.42,
"updated_at": "2026-10-29T13:30:00Z",
"base_fee_gwei": 0.005,
"gas_price_gwei": 0.006,
"recommended_tier": "standard",
"gas_price_wei_hex": "0x5b8d80",
"est_transfer_cost_eth": 1.26e-7,
"max_priority_fee_gwei": 0.001,
"max_priority_fee_wei_hex": "0xf4240"
}
}Tags
x402
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