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Agent402 UK – Ethereum Unit Converter (wei ↔ gwei ↔ ether)
x402
Agent402 UK – Ethereum Unit Converter (wei ↔ gwei ↔ ether) is a paid API for AI agents from agent402.co.uk, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Converts Ethereum denominations (wei, gwei, ether) between each other as precise decimal strings, avoiding floating-point drift.
Price / call$0.001
Success—
StatusUnknown
How this service works
Don't burn tokens on deterministic work. Go/no-go jobs first: payout preflight, text firewall (PII/secrets), budget check — then rails, calendars, finmath. x402 USDC on Base. UK + global. agent402.co.uk — not agent402.tools. $0.001–$0.002 USDC on Base. No API keys.
Output
Returns a JSON object with a boolean 'valid' field indicating whether the conversion succeeded, and a 'result' field containing the converted amount as a precise decimal string (e.g. {"valid": true, "result": "1500000000000000000"}).
Example use cases
Gas price conversion for EVM transaction
“I need to convert 25 gwei to wei as an exact string so I can pass it to the smart contract call — no floating point.”
Display ether amount from raw wei balance
“Take this raw balance of 3500000000000000000 wei and convert it to ether so I can show the user a human-readable number.”
DeFi agent slippage calculation
“Convert 0.05 ether to gwei as a precise decimal string — I'm using it mid-task to calculate slippage for a Uniswap trade.”
Technical details
Endpoint
POSThttps://agent402.co.uk/v1/utils/eth-unitsWhen to prefer
Choose this endpoint when an EVM agent needs exact, float-safe denomination conversions between wei, gwei, and ether mid-task. Prefer it over JavaScript or Python native arithmetic when floating-point drift would corrupt downstream contract calls or financial calculations. Especially useful in automated pipelines where string-based precision is required.
Side effects
- Invalid unit name in 'from' or 'to' (not one of wei/gwei/ether) — likely returns valid:false or error
- Amount string is not a valid number — may return valid:false
- Missing required fields — likely HTTP 400 or valid:false response
- Payment not included or insufficient — HTTP 402 response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| to | string | wei|gwei|ether |
| from | string | wei|gwei|ether |
| amount | string | Amount |
Output
Schema · Response
{
"type": "json",
"example": {
"valid": true,
"result": "1500000000000000000"
}
}Tags
x402
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