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PayAI Gas Price Oracle
x402
PayAI Gas Price Oracle is a paid API for AI agents from meryol-payai.hf.space, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-11).
Returns a live gas snapshot for Ethereum-compatible chains including base fee, p50/p90 priority fees in gwei, and USD cost estimates for common transaction types using real-time ETH/USD pricing.
Price / call$0.001
Success—
StatusUnknown
How this service works
Pre-broadcast gas check: base fee + p50/p90 priority fee in gwei from eth_feeHistory, plus USD cost per common tx type (native transfer, ERC-20 transfer, swap) at live ETH/USD. Size gas budgets or postpone txs under congestion. Never returns null costs — degraded upstreams are a free 502, not a paid empty answer. Chains: ethereum, base, arbitrum, optimism.
Output
Returns a live gas snapshot including the current base fee in gwei, p50 and p90 priority fee estimates from eth_feeHistory, and USD cost estimates for native transfers, ERC-20 transfers, and swaps, with ETH/USD rate from CoinGecko folded in.
Example use cases
Example prompt
“What are the current gas fees on Arbitrum — give me the base fee, p50 and p90 priority fees in gwei, and how much a swap would cost in USD right now?”
Technical details
Endpoint
GEThttps://meryol-payai.hf.space/gas/now/:chain?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a live, actionable gas snapshot with USD cost context for a specific EVM chain (Ethereum, Base, Arbitrum, or Optimism) — especially when deciding whether to submit a transaction or sizing a gas budget. Prefer over static gas trackers when you need per-tx-type USD cost breakdowns and real-time ETH price folded in.
Side effects
- Unsupported chain value returns a 400 or validation error
- CoinGecko rate unavailable causes USD cost computation to fail
- RPC node for the target chain is down or rate-limited, returning stale or empty data
- Network congestion causes eth_feeHistory to return incomplete blocks
Input
{
"input": {
"type": "http",
"method": "GET",
"pathParams": {
"chain": "ethereum"
},
"queryParams": {}
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
{
"chain": "ethereum",
"notes": [],
"cost_usd": {
"swap": 0.050323,
"transfer": 0.005871,
"erc20_transfer": 0.018172
},
"base_fee_gwei": 0.126223,
"eth_price_usd": 1726.47,
"priority_fee_p50_gwei": 0.035709,
"priority_fee_p90_gwei": 1
}Tags
x402
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