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ETH Unit Converter (wei / gwei / ether / ERC20)
x402
ETH Unit Converter (wei / gwei / ether / ERC20) is a paid API for AI agents from api.24klabs.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).
Converts Ethereum denominations (wei, gwei, ether) or arbitrary-decimal ERC20 token amounts with big-integer precision, and optionally computes USD value from a caller-supplied price.
Price / call$0.001
Success—
StatusUnknown
How this service works
Convert between wei, gwei and ether (or arbitrary-decimal ERC20 amounts) with big-integer precision; optional USD valuation from a caller-supplied price.
Output
Returns the converted amount as a big-integer-safe string and formatted decimal, the source and target units, and optionally the USD valuation computed from the caller-supplied price per unit.
Example use cases
Display wallet balance in ether
“I have a raw balance of 4875000000000000000 wei from the Ethereum RPC — can you convert that to ether so I can show it nicely in my wallet UI?”
ERC20 token amount formatting
“I got a raw USDC balance of 250000000 from the contract and USDC has 6 decimals — convert that to a human-readable token amount for me.”
Gas price gwei to wei for transaction
“I need to set a gas price of 25 gwei for my transaction — what is that in wei so I can pass it to the RPC call?”
Technical details
Endpoint
POSThttps://api.24klabs.ai/api/v1/eth-unit-converterWhen to prefer
Choose this endpoint when you need precision-safe Ethereum unit conversion without implementing BigInt arithmetic yourself, especially when handling raw on-chain values (wei from RPC responses), ERC20 amounts with non-standard decimals, or when you need an instant USD valuation alongside the unit conversion. Prefer this over general-purpose math APIs because it understands Ethereum denominations natively and avoids floating-point precision loss.
Side effects
- Invalid or non-numeric amount returns a 400 error
- Unsupported unit denomination causes a validation error
- Missing required fields (amount or target unit) returns a 400 bad request
- Overflow or underflow with extreme values may return a computation error
- Supplying a negative USD price may result in a validation rejection
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| amount | string | |
| to_unit | string | |
| from_unit | string | |
| usd_price | number |
Output
Schema · Response
{
"type": "json",
"example": {
"result": "1500000000",
"usd_value": 4800
}
}Tags
x402
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