Example inputPOST /api/v1/x402/gas-cost-eth
{
"gas_used": 21000,
"gas_price_wei": "1000000000"
}Portable intent card · chain-primitives-local
Gas Cost in Ether API for agents
Compute total gas cost in ether from used gas and price wei. Call when budgeting ETH spend for a planned or observed transaction. Returns gas cost in eth as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.
Intent to transaction
One command, attributed.
The source header follows this discovery route through challenge, payment and delivery without exposing the buyer or request body.
npx agentcash@latest fetch https://api.delx.ai/api/v1/x402/gas-cost-eth -m POST -H 'x-delx-source: intent-card-gas-cost-eth-api' --max-amount 0.001 -b '{"gas_used":21000,"gas_price_wei":"1000000000"}'Agent discoverydelx/intent-card/v1
{
"intent": "Gas Cost in Ether for an agent workflow",
"tool_name": "util_gas_cost_eth",
"price_usdc": "0.001",
"machine_url": "https://commerce.delx.ai/intents/gas-cost-eth-api.json"
}Portable and inspectable