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CRA Agent Gas Fee Cost Estimator
x402
CRA Agent Gas Fee Cost Estimator is a paid API for AI agents from api.cra-agent.tech, paid per call via x402, $0.0005/call, status unknown (last checked 2026-09-17).
Returns the estimated transaction cost in USDC for a given amount of gas, calculated at the current and next predicted base fee
Price / call$0.0005
Success—
StatusUnknown
How this service works
Cost in USDC of a transaction with the given gas at current and next base fee (?gas=21000)
Output
Returns the estimated USDC cost of executing a transaction with the specified gas amount, evaluated at both the current base fee and the next projected base fee. This gives the user a real-time and forward-looking view of transaction costs denominated in USDC.
Example use cases
Pre-flight transaction cost check
“Before I send this ETH transfer, tell me how much it'll cost in USDC — the transaction uses 21000 gas. Show me the current base fee price and what it'll be next block.”
Smart contract interaction cost estimate
“I'm about to call a contract that uses about 150000 gas — what's that going to cost me in USDC at today's base fee and the projected next block fee?”
Fee-sensitive trade timing
“I want to know if now is a cheap time to transact — can you tell me what a 65000 gas transaction would cost in USDC at the current and next base fee?”
Technical details
Endpoint
GEThttps://api.cra-agent.tech/v1/paid/fees/estimateWhen to prefer
Use this endpoint when you need a real-time USDC-denominated cost estimate for an Ethereum transaction given a specific gas amount. It is especially useful for pre-flight cost checks before submitting a transaction, or for helping users decide whether to transact now or wait based on next-block base fee projections. Prefer this over generic gas price APIs when you need the cost expressed in USDC rather than in Gwei or ETH.
Side effects
- Missing or invalid gas parameter returns an error or default response
- Gas value of 0 or negative integer may cause unexpected results
- Stale base fee data if the underlying RPC source is lagging
- Network congestion spikes may make the 'next base fee' estimate inaccurate
- Rate limiting or payment failure if x402 payment not properly handled
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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