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Bot Bazaar EVM Calldata Decoder
x402
Bot Bazaar EVM Calldata Decoder is a paid API for AI agents from bot-bazaar.fly.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-30).
Decodes raw EVM hex calldata for standard ERC-20 transfers, approvals, and balance lookups into human-readable parameters
Price / call$0.01
Success—
StatusUnknown
How this service works
Decode raw EVM hex calldata for standard ERC-20 transfers, approvals, and balance lookups into human-readable parameters.
Output
Returns the decoded ERC-20 function name (e.g. transfer, approve, balanceOf) along with human-readable parameters such as recipient address, spender address, token amount, or token holder address extracted from the raw hex calldata.
Example use cases
Inspecting a suspicious token transfer
“I received this raw hex calldata from an Ethereum transaction and want to know what it does before signing — can you decode it and tell me who the recipient is and how many tokens are being transferred: 0xa9059cbb000000000000000000000000dead000000000000000000000000000000000000000000000000000000000000000000000000000000000000000de0b6b3a7640000”
Auditing an ERC-20 approval transaction
“Decode this hex calldata for me and tell me what ERC-20 function it's invoking and what spender address and allowance amount it's setting: 0x095ea7b3000000000000000000000000uniswap00000000000000000000000000000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff”
Debugging a smart contract interaction
“I'm debugging a failed Ethereum transaction and need to understand what the input data is — can you parse this raw calldata and tell me the function name and all its decoded parameters: 0x70a08231000000000000000000000000ab5801a7d398351b8be11c439e05c5b3259aec9b”
Technical details
Endpoint
GEThttps://bot-bazaar.fly.dev/v1/x402/calldata-decoder?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to quickly make sense of raw EVM hex calldata specifically for the three standard ERC-20 operations (transfer, approve, balanceOf) without spinning up a full Ethereum node or ABI decoder. It is ideal for transaction inspection, security auditing of token interactions, or debugging smart contract calls where the calldata is already known and you just need human-readable output at low cost.
Side effects
- Unrecognized function selector — calldata does not match ERC-20 transfer, approve, or balanceOf signatures
- Malformed hex input — calldata not properly 0x-prefixed or contains non-hex characters
- Truncated calldata — insufficient bytes to decode all parameters
- Non-ERC-20 calldata — calldata belongs to a different contract standard and cannot be decoded
- Payment failure — USDC balance insufficient to cover $0.01 per-call fee
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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