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three.ws Market Gas Price Oracle
x402
three.ws Market Gas Price Oracle is a paid API for AI agents from three.ws, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-23).
Returns current Ethereum gas price tiers and estimated USD costs for common on-chain actions like DEX swaps, used for fee estimation in the three.ws micropayment agent platform.
Price / call$0.001
Success—
StatusUnknown
How this service works
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Output
A JSON object containing one or more gas price tiers (e.g. 'standard'), each with a gas price in gwei, ETH price in USD, and a list of common on-chain actions (e.g. DEX swap) with their gas units, estimated USD cost, and a human-readable label.
Example use cases
Estimate DEX swap cost before transacting
“Before I execute this swap, can you tell me what the current standard gas price is in gwei and how much a DEX swap would cost me in USD at today's ETH price?”
Dynamic fee display for embedded 3D agent
“My three.ws agent needs to show users the current cost of an on-chain action — can you fetch the latest gas tiers so I can display accurate USD fees in the chat interface?”
Monitor gas prices for optimal transaction timing
“Check the current gas price tiers on three.ws and tell me the gwei price and USD cost for a swap — I want to know if now is a good time to transact or if fees are high.”
Technical details
Endpoint
GEThttps://three.ws/api/x402/market-gas?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need real-time Ethereum gas price data and USD cost estimates for on-chain actions within the three.ws agent/micropayment ecosystem. Prefer it when already integrated with three.ws x402 payment infrastructure and needing fee transparency for embedded agent interactions or pre-transaction cost checks.
Side effects
- Payment not included — endpoint requires $0.001 USDC via x402 protocol, returns 402 if unpaid
- Network or oracle unavailability may return 503 or stale data
- Malformed properties filter returns 400 or empty tier list
- ETH price oracle lag may cause temporarily inaccurate USD estimates
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"tiers": [
{
"key": "standard",
"actions": [
{
"gas": 150000,
"key": "swap",
"usd": 3.12,
"label": "DEX swap"
}
],
"gas_price_gwei": 6.4
}
],
"eth_price_usd": 3251.7
}
}Tags
x402
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