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TraceFast Contract Bytecode
x402
TraceFast Contract Bytecode is a paid API for AI agents from mpp.tracefast.xyz, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-14).
Returns the live runtime bytecode, code hash, and structural fingerprint of an Ethereum smart contract by address
Price / call$0.005
Success—
StatusUnknown
How this service works
TraceFast live Ethereum data: the current runtime bytecode of a contract as hex, with its code hash and a structural fingerprint that is equal across contracts sharing the same logic. Up to 24 576 bytes of code. An address with no indexed code answers 404. Path address: The contract address, `0x`-prefixed, 40 hex characters, any case. Docs: https://docs.tracefast.xyz/api/contract-bytecode.md
Output
Returns up to 24,576 bytes of hex-encoded runtime bytecode, the keccak256 code hash, and a structural fingerprint that is identical across contracts sharing the same logic (e.g. clones or proxies). Returns 404 if the address has no deployed code.
Example use cases
Verify deployed contract integrity
“Pull the live bytecode for the contract at 0xdAC17F958D2ee523a2206206994597C13D831ec7 on Ethereum mainnet — I want to check the code hash matches what was audited.”
Detect contract clones by fingerprint
“Fetch the structural fingerprint for the contract at 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D so I can compare it against other contracts to see if they share the same logic.”
Inspect unknown contract code
“Get me the full runtime bytecode hex for Ethereum contract 0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984 — I want to disassemble it and understand what it does.”
Technical details
Endpoint
GEThttps://mpp.tracefast.xyz/api/v1/chains/1/contracts/:address/bytecode?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need the live, current runtime bytecode of an Ethereum mainnet contract — especially when you also need the code hash for verification or the structural fingerprint for clone/proxy detection. Prefer this over static datasets when you need real-time accuracy of what is actually deployed on-chain right now.
Side effects
- 404 if address has no deployed bytecode (EOA or undeployed address)
- Invalid address format returns an error (must be 0x-prefixed 40 hex chars)
- Network or payment failure returns non-200 status
- Address with self-destructed contract may return 404 or empty bytecode
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | — |
Tags
x402
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