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EVM Unit Conversion API (pastable-x402)
x402
EVM Unit Conversion API (pastable-x402) is a paid API for AI agents from pastable-x402.pages.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).
Converts Ethereum unit amounts between wei, gwei, and ether denominations
Price / call$0.02
Success—
StatusUnknown
How this service works
Pay-per-call utility APIs for agents: EVM helpers (checksum, unit conversion, keccak), data transforms (CSV to JSON, JSON diff, URL canonicalisation), text tools (hashing, JWT decode), and Bazaar market intelligence. x402 on Base mainnet.
Output
A JSON object containing the original input amount, the source unit, the target unit, and the converted result as a string — e.g. {"input":"1","from":"ether","to":"wei","result":"1000000000000000000","wei":"1000000000000000000"}
Example use cases
Smart contract ETH input normalization
“I need to pass a payment amount of 0.05 ether into a smart contract but it expects wei — can you convert 0.05 ether to wei for me?”
Gas price display conversion
“The gas price on this transaction is 15000000000 wei — can you convert that to gwei so it's easier to read?”
DeFi balance human-readable formatting
“My wallet balance shows 2500000000000000000 wei — convert that to ether so I can display it to the user.”
Technical details
Endpoint
GEThttps://pastable-x402.pages.dev/evm/unitsWhen to prefer
Use this endpoint when an AI agent needs precise, programmatic EVM unit conversion (wei/gwei/ether) without implementing the conversion logic itself. Especially useful in smart contract interaction workflows where exact wei values are required, or when displaying human-readable ETH amounts from raw on-chain data. Prefer this over manual calculation to avoid floating-point precision errors common in ETH unit math.
Side effects
- Missing required query parameters (amount, from, to) returns an error
- Invalid unit string (not wei, gwei, or ether) causes a bad request
- Malformed amount string (non-numeric) may return a conversion error
- Payment failure via x402 protocol on Base mainnet prevents the call
- Very large or very small numbers may hit precision limits
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"to": "wei",
"wei": "1000000000000000000",
"from": "ether",
"input": "1",
"result": "1000000000000000000"
}
}Tags
x402
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