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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 in multiple tiers (slow/standard/fast) with USD cost estimates and congestion metrics 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 containing the current Base block number, chain ID (8453), a congestion score (0–1), base fee in gwei, recommended tier, and three gas price tiers (slow/standard/fast) each with max fee per gas, max priority fee, estimated USD cost, and hex-encoded EIP-1559 transaction fields ready to plug into a transaction object.
Example use cases
Pre-trade gas cost check
“Before I submit this swap on Base, what's the current gas price and how much will it cost in USD at standard tier for roughly 150000 gas units?”
Network congestion monitoring
“Is the Base network congested right now? Give me the current congestion level and tell me which gas tier you'd recommend.”
Automated tx fee budgeting
“I'm about to batch some onchain transactions on Base — what's the fast-tier gas price in gwei and estimated USD cost for 21000 gas so I can set my fee budget?”
Technical details
Endpoint
GEThttps://kr-x402-mvp.kgy5612.workers.dev/api/chain/gas-price?utm_source=zero.xyzWhen to prefer
Use this endpoint when your agent needs real-time Base L2 gas prices without requiring an API key, paying only $0.001 USDC per call via x402. Ideal for trading or onchain agents that need EIP-1559-ready hex tx fields and USD cost estimates in one call, especially when operating autonomously without pre-provisioned API credentials.
Side effects
- RPC unavailability from mainnet.base.org causes stale or failed response
- Payment failure (402) if USDC x402 micropayment not included or insufficient
- gas_limit below 21000 or above 30000000 returns validation error
- Network congestion spikes may cause rapid price staleness between fetch and broadcast
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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