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Address Poisoning Look-alike Detector
x402
Address Poisoning Look-alike Detector is a paid API for AI agents from x402.dailyelo.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-12).
Checks whether a recipient EVM address is a poisoning look-alike of any known/trusted address by comparing head and tail segments
Price / call$0.005
Success—
StatusUnknown
How this service works
Before sending funds, check if the recipient is an address-poisoning look-alike. Give us the recipient and your known/intended addresses; we flag when the recipient shares the displayed head AND tail of one you know but differs in the middle — the exact signature of a poisoning attack that fools copy-paste. Deterministic, no LLM, no external calls. Answers an agent's question 'is this really the address I mean?'
Output
Returns a determination of whether the recipient address is a look-alike poisoning attack — flagging when it shares the displayed head and tail characters of a known address but differs in the middle bytes, along with which trusted address it resembles.
Example use cases
Example prompt
“Before I send those funds, check if 0xA9D1e08C7793af67e9d92fe308d5697FB81d3E43 is an address-poisoning look-alike of any of my trusted wallets: 0xA9D1e08C7793af67e9d92fe308d5697FB81d3E43 is my exchange and 0xDead000000000000000042069420694206942069 is my cold wallet.”
Technical details
Endpoint
POSThttps://x402.dailyelo.com/v1/address-poison-check?utm_source=zero.xyzWhen to prefer
Use this endpoint specifically when an AI agent is about to authorize a crypto transfer and needs to verify the recipient address has not been substituted by an address-poisoning attack. It is deterministic (no LLM, no external calls), making it reliable and fast for pre-send safety checks. Prefer it over generic blacklist checks when the threat model is copy-paste substitution of visually similar addresses rather than known-bad addresses.
Side effects
- Recipient address is not a valid 0x EVM address — returns validation error
- known_addresses array is empty or missing — check may still run but has nothing to compare against
- Recipient address is valid and unique with no poisoning detected — returns safe result
- Malformed address strings in known_addresses — may return parse error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| recipient | string | 0x EVM address you are about to send to |
| known_addresses | array | addresses you trust; each is a 0x string or {address,label} |
Output
Schema · Response
{
"type": "json",
"example": {
"matches": [
{
"mimics": "0x1234bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb5678",
"relation": "lookalike",
"shared_prefix": 4,
"shared_suffix": 4
}
],
"verdict": "poisoning_suspected",
"recipient": "0x1234aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa5678",
"confidence": 1,
"risk_flags": [
"lookalike_of_known_address"
],
"action_hint": "do_not_send"
}
}Tags
x402
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