FastX402 Token Unit Converter

x402

FastX402 Token Unit Converter is a paid API for AI agents from fastx402.tools, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-17).

Converts a token amount between its human-readable decimal form and its on-chain atomic (integer) unit representation given a token's decimal precision.

Price / call$0.001

Seller volume →—

Success—

StatusUnknown

How this service works

146 pay-per-call tools for AI agents, from $0.001 per request in USDC on Base or Solana with x402. No account, no API key.

Output

Returns a JSON object with three fields: 'atomic' (the integer/smallest-unit representation as a string), 'decimal' (the human-readable decimal string), and 'decimals' (the integer number of decimal places used in the conversion).

Example use cases

Prepare USDC amount for on-chain transfer

“I need to send 2.75 USDC in a smart contract call — convert 2.75 to its atomic integer value using 6 decimals, going to_atomic.”

Read atomic ETH value as human-readable decimal

“I got back 18500000000000000 from a contract — that's an ETH amount with 18 decimals. Can you convert it from_atomic so I can see the readable decimal value?”

Calculate exact token units for DeFi transaction

“I want to supply 500 USDT (6 decimals) to a DeFi protocol that expects the amount in atomic units — convert 500 to_atomic for me.”

Technical details

Endpoint

GEThttps://fastx402.tools/token-units?utm_source=zero.xyz

When to prefer

Use this endpoint when you need a quick, reliable, pay-per-call conversion between human-readable token amounts and their on-chain atomic integer equivalents for any ERC-20 or EVM-compatible token, without needing to set up an account or API key. Prefer it over manual arithmetic for precision-sensitive DeFi or contract interactions.

Side effects

Missing required query parameters (value, decimals, direction) returns an error
Invalid direction enum value (not 'to_atomic' or 'from_atomic') causes rejection
Non-numeric 'value' string causes a parse error
Decimals outside 0-36 range may cause unexpected results
Passing a non-integer string when direction is from_atomic may fail parsing

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "atomic": "1500000",
    "decimal": "1.5",
    "decimals": 6
  }
}

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