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EVM Signature Intent Decoder
x402
EVM Signature Intent Decoder is a paid API for AI agents from x402.dailyelo.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-10).
Decodes EVM signature requests (EIP-712, Permit/Permit2, ERC-20 approve calldata) into structured human-readable intent with token, spender, amount, expiry, risk flags, and action hints
Price / call$0.005
Success—
StatusUnknown
How this service works
Decode an EVM signature request (EIP-712 typed data, Permit/Permit2, or ERC-20 approve calldata) into a structured intent: what token, which spender, how much, until when, plus risk_flags and an action_hint. Deterministic, no LLM. Answers an agent's question 'what am I about to sign?'
Output
A structured intent object containing: the token being approved, spender address, approval amount, expiry timestamp, risk_flags (array of detected danger signals), and an action_hint summarizing what the signature would authorize — all determined deterministically without an LLM.
Example use cases
Example prompt
“Before I sign this, can you decode what this EIP-712 Permit2 message is actually asking me to approve — the domain, message, and primaryType are here — and tell me what token, which spender, how much, when it expires, and whether there are any risk flags I should know about?”
Technical details
Endpoint
POSThttps://x402.dailyelo.com/v1/sign-decode?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent or wallet interface needs to explain to a user what an EVM signing request will authorize before they sign it — especially for EIP-712, Permit, Permit2, or ERC-20 approve flows. Prefer this over generic calldata decoders because it specifically outputs structured risk_flags and action_hint fields tuned for token approval safety, and it is deterministic (no LLM hallucination risk).
Side effects
- Unrecognized signature format returns parsing error — calldata or message must conform to EIP-712, Permit, Permit2, or ERC-20 approve ABI
- Missing required fields (domain or message for typed data, calldata for raw approve) returns validation error
- Malformed calldata hex string returns decode error
- Unsupported primaryType returns unknown type error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| domain | object | |
| message | object | |
| calldata | string | |
| primaryType | string |
Output
Schema · Response
{
"type": "json",
"example": {
"token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "unlimited",
"intent": "grant_allowance",
"spender": "0x66a9893cC07D91D95644AEDD05D03f95e1dBA8Af",
"standard": "Permit2-AllowanceTransfer (PermitSingle)",
"confidence": 1,
"expires_at": "2026-07-12T11:17:58Z",
"risk_flags": [
"unlimited_allowance"
],
"action_hint": "ask_for_confirmation",
"spender_known": "Uniswap Universal Router v2"
}
}Tags
x402
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