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Base Gas Oracle (x402 Microdata)
x402
Base Gas Oracle (x402 Microdata) 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 2026-11-02).
Returns current Base L2 gas prices, fee tiers (slow/standard/fast), congestion level, and estimated transaction costs for a given gas limit, paid per-call via x402 USDC.
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, base fee in gwei, gas price in gwei and wei hex, EIP-1559 tx fields (gas, type, maxFeePerGas, maxPriorityFeePerGas) in hex, slow/standard/fast fee tiers each with max_fee_gwei, max_priority_fee_gwei, and est_cost_usd, a congestion score (0–1), a recommended_tier label, data sources, chain ID (8453), and an updated_at timestamp.
Example use cases
Pre-trade gas cost check
“Before I send this token swap on Base, what's the recommended gas fee tier and how much will it cost me in USD at current network conditions for about 150000 gas units?”
Monitor Base congestion level
“Is the Base network congested right now? What's the current gas price and which fee tier do you recommend I use?”
Automated agent transaction budgeting
“I'm about to batch-submit a transaction on Base — tell me the current fast-tier maxFeePerGas and maxPriorityFeePerGas in gwei and the hex values I'd put in the tx fields, for 21000 gas.”
Technical details
Endpoint
GEThttps://kr-x402-mvp.kgy5612.workers.dev/api/etherscan/gas-oracle?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your AI agent needs real-time Base L2 gas data without managing API keys, paying only $0.001 USDC per call via x402. Ideal for onchain trading bots, DeFi automation agents, or any workflow that needs EIP-1559-compatible fee fields ready to plug into a transaction — especially when operating on the Base chain specifically rather than Ethereum mainnet or other L2s.
Side effects
- RPC source (mainnet.base.org) unavailable — may return stale or error response
- Payment failure via x402 (insufficient USDC balance) — 402 response before data is returned
- Invalid gas_limit parameter (below 21000 or above 30000000) — validation error
- Network timeout if Base RPC is slow — may result in delayed or failed response
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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