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EIP-712 Typed-Data Signature Risk Decoder
x402
EIP-712 Typed-Data Signature Risk Decoder is a paid API for AI agents from gpt55.558686.xyz, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Inspects EIP-712, Permit, and Permit2 typed-data structures before signing to surface spender, value, deadline, nonce, chainId, and verifyingContract risk fields
Price / call$0.01
Success—
StatusUnknown
Output
Returns a structured risk report including decoded spender address, value at risk, deadline, nonce, chain ID, verifying contract, and any identified risk warnings or anomalies present in the EIP-712 / Permit / Permit2 typed-data payload
Example use cases
Example prompt
“Before I sign this Permit2 message, decode it and tell me who the spender is, how much value they can take, when the deadline expires, and whether there are any red flags — here's the typed data: {typedData}”
Technical details
Endpoint
POSThttps://gpt55.558686.xyz/v1/paid/eip712-signature-risk-decoderWhen to prefer
Use this endpoint when an AI agent or wallet needs to programmatically assess the risk of an EIP-712, Permit, or Permit2 signature request before the user approves it — especially when spender identity, token value, deadlines, or chain context need to be surfaced clearly. Prefer this over generic contract decoders when the payload is specifically a typed-data signing request rather than a raw transaction.
Side effects
- Malformed or unparseable typed data returns a parse error
- Missing required typed-data fields yields incomplete risk assessment
- Unrecognized domain or verifyingContract may return unknown risk label
- Payment not included or insufficient USDC results in 402 response
- Invalid chain ID causes chain mismatch warning or error
- Extremely large typed-data payloads may be rejected due to maxLength limits
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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