# Address Poisoning Check

> Address Poisoning Check is a paid API for AI agents from 402.com.tr, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-16).

Detects whether a recipient wallet address is a look-alike (poisoned) address by comparing its first/last characters against addresses the sender's wallet has actually transacted with.

## Facts

- Endpoint: GET https://402.com.tr/api/x402/address-poisoning?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/address-poisoning-check-3adcf58f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_PgjYs_vTOO2gCYisxR2Fb

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability address-poisoning-check-3adcf58f
```

Example prompt: Before I send this payment, can you check if the recipient address 0xAbCd...1234 is an address-poisoning look-alike compared to my wallet 0x9876...5678 — I want to make sure it's not a scammer address mimicking one I've used before?

## When to prefer this

Use this endpoint before any automated or agent-initiated outbound payment to catch address poisoning attacks, especially when a recipient address was recently copy-pasted or appeared in transaction history unexpectedly. Ideal for AI agents that auto-pay recurring counterparties and need a lightweight fraud gate. Prefer this over generic address validation tools when the specific threat model is look-alike dust-attack addresses mimicking known counterparties.

## Known failure modes

- Invalid or malformed wallet address format returns an error
- Recipient address with no transaction history overlap may yield inconclusive results
- Heuristic may produce false positives if legitimate addresses share prefix/suffix patterns
- Rate limiting or payment failure if USDC payment of $0.03 is not processed correctly
- Network or provider downtime causing unavailability of the endpoint

## How this service works

The address-poisoning attack: a scammer sends dust from an address whose first/last characters match one you really use, hoping you copy-paste the poisoned one. An auto-paying agent is the perfect victim. This compares the recipient against the head/tail of addresses the wallet actually transacts with and flags a look-alike that is NOT a real counterparty. Pass wallet= (yours) and to= (the recipient). A heuristic — verify the full address regardless. Not financial advice.

## Output

Returns a heuristic assessment indicating whether the recipient address appears to be a poisoned look-alike of addresses the sender wallet has genuinely transacted with, based on matching head and tail character patterns. Includes a flag and reasoning about whether the recipient is a real counterparty or a suspected scammer address.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "wallet",
      "to"
     ],
     "properties": {
      "to": {
       "type": "string",
       "description": "Recipient you're about to pay"
      },
      "wallet": {
       "type": "string",
       "description": "Your wallet (the sender)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/address-poisoning-check-3adcf58f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 402.com.tr](https://www.zero.xyz/host/402.com.tr/llms.txt)