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Signature Decoder
x402
Signature Decoder is a paid API for AI agents from sign.cyberwarex.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Decodes EIP-712 typed data or personal_sign requests into human-readable summaries with security risk flags for drainer patterns like Permit approvals and Seaport orders
Price / call$0.002
Success—
StatusUnknown
How this service works
Decode an off-chain SIGNATURE REQUEST before you sign it: EIP-712 typed data (eth_signTypedData_v4) or a plain personal_sign string. Turns the opaque request into a human-readable summary plus security risk flags for the drainer patterns wallets miss - gasless unlimited token approvals (EIP-2612 Permit, DAI permit, Uniswap Permit2) and asset-transferring marketplace orders (Seaport). Keyless, deterministic, zero network.
Output
Returns a JSON object with: 'kind' (typed_data or personal_sign), 'summary' (plain-English explanation of what signing would do), 'risk' object with level (none/caution/danger) and specific flags for dangerous patterns like unlimited Permit approvals or asset-transferring Seaport orders, 'domain' with EIP-712 domain info, 'primaryType', and a 'disclaimer'.
Example use cases
Catch unlimited token approval scam
“I got a sign request from a dApp and it looks suspicious — can you decode this typed_data and tell me if I'd be giving away unlimited token access? Here it is: {"types":{"Permit":[{"name":"owner","type":"address"},{"name":"spender","type":"address"},{"name":"value","type":"uint256"},{"name":"nonce","type":"uint256"},{"name":"deadline","type":"uint256"}]},"domain":{"name":"DAI Stablecoin","chainId":1,"verifyingContract":"0x6B175474E89094C44Da98b954EedeAC495271d0F"},"primaryType":"Permit","message":{"owner":"0xabc","spender":"0xevil","value":"115792089237316195423570985008687907853269984665640564039457584007913129639935","nonce":0,"deadline":9999999999}}”
Verify Seaport NFT order safety
“A marketplace is asking me to sign something before listing my NFT — please decode this Seaport typed_data and flag any risks: {"types":{"OrderComponents":[{"name":"offerer","type":"address"},{"name":"zone","type":"address"}]},"domain":{"name":"Seaport","chainId":1,"verifyingContract":"0x00000000000000ADc04C56Bf30aC9d3c0aAF14dC"},"primaryType":"OrderComponents","message":{"offerer":"0xabc","zone":"0x000"}}”
Explain plain personal_sign message
“My wallet is showing a weird sign request with just a string — can you tell me what this personal_sign message actually means and if it's safe to sign? The message is: 'Sign in to CoolApp.xyz with your wallet. Nonce: 8f2e1a'”
Technical details
Endpoint
GEThttps://sign.cyberwarex.com/decodeWhen to prefer
Choose this endpoint when you need to decode and risk-assess an Ethereum signing request (EIP-712 or personal_sign) before a user signs it, especially to detect token drainer patterns like EIP-2612 Permit, DAI permit, Uniswap Permit2 unlimited approvals, and Seaport asset transfers. It is deterministic and requires no network calls or private keys, making it safe and fast for pre-signing security checks in wallet UIs, DeFi agents, or security bots.
Side effects
- Missing required 'typed_data' or 'message' parameter returns an error
- Malformed or non-EIP-712 typed_data JSON causes a parse failure
- Unknown primaryType may result in limited risk analysis with reduced flags
- Very large or deeply nested typed data structures may be truncated
- Payment of 0.002 USDC required per call; missing x402 payment returns 402 error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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