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Web3 Tools Hex Converter
x402
Web3 Tools Hex Converter is a paid API for AI agents from web3-tools.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-21).
Converts between hex strings, UTF-8 text, and signed/unsigned integers with 32-byte padding for EVM/blockchain data handling.
Price / call$0.02
Success—
StatusUnknown
How this service works
Convert hex to UTF-8 text or an integer (signed or unsigned), and text or integers to hex with 32-byte padding.
Output
Returns the converted value in the requested format: for hex-to-text, the UTF-8 decoded string; for hex-to-int, both signed and unsigned integer representations; for text-to-hex or int-to-hex, the hex string with 32-byte padding. Also includes metadata fields such as source, bytes, summary, and any reasons or disclaimer.
Example use cases
Decode ABI-encoded string from calldata
“I pulled this hex value out of an Ethereum transaction's calldata: 0x48656c6c6f20576f726c64 — can you convert it to plain text so I can read what it says?”
Encode integer as 32-byte padded hex
“I need to encode the integer 255 as a 32-byte padded hex value for a smart contract call — can you do an int-to-hex conversion for me?”
Convert contract event data hex to number
“This EVM event log has a hex value 0x000000000000000000000000000000000000000000000000000000000000007B — what is that as a signed and unsigned integer?”
Technical details
Endpoint
GEThttps://web3-tools.x402tookit.com/hex-convert?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to convert between hex, text, and integer representations in an EVM/blockchain context — especially when 32-byte padding is required for ABI compatibility. It handles both directions (encode/decode) and signed vs unsigned integers, making it ideal for parsing calldata, event logs, or ABI-encoded parameters without needing a local web3 library.
Side effects
- Invalid hex string (non-hex characters or malformed 0x prefix) returns an error
- Unknown or missing 'op' query parameter causes failure
- Non-UTF-8 byte sequences in hex-to-text conversion may result in garbled or error output
- Integer out of range for int-to-hex may not be handled gracefully
- Missing required 'value' query parameter returns an error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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