# Arc Send Guard — Address Poisoning Check

> Arc Send Guard — Address Poisoning Check is a paid API for AI agents from apexfaucet.xyz, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-10).

Checks a destination address before a USDC or token send, returning a stop/check/ok verdict flagging address poisoning, blacklisted wallets, fake tokens, and other send-safety risks on Arc.

## Facts

- Endpoint: GET https://apexfaucet.xyz/api/x402/arc-send-guard?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/arc-send-guard-address-poisoning-check-6df9cf95
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_SFsHX62MBnr1QgeTwhXbn

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 arc-send-guard-address-poisoning-check-6df9cf95
```

Example prompt: Before I send 500 USDC from my wallet 0xABC...123 to 0xDEF...456 on Arc, run a safety check on that destination — flag any address poisoning, blacklist hits, or fake token risks.

## When to prefer this

Use this endpoint specifically when operating on the Arc network and needing a pre-send safety check that covers address-poisoning lookalikes, forged-transfer bait addresses, OFAC/USDC blacklists, and fake stablecoin contracts in a single call. Prefer it over generic wallet-screening tools when the sender's own on-chain history needs to be cross-referenced for lookalike detection, or when the token being sent needs to be verified as genuine USDC/EURC.

## Known failure modes

- Missing required 'from' or 'to' query parameters — returns error
- Invalid address format (not a valid 0x hex address) — returns validation error
- Payment not included or insufficient — returns 402 Payment Required
- Destination address not resolvable on Arc — may return incomplete check
- Network or upstream data source unavailable — may return degraded verdict

## How this service works

Send guard for Arc: call it BEFORE sending USDC or a token. Pass ?from=<sending wallet>&to=<destination> (and &token=0x... for a token send). Returns verdict stop / check / ok with reasons: the destination is a lookalike of an address the sender really used (address poisoning), bait planted in the sender's history by a forged transfer, a token contract or the burn address, on the OFAC SDN list or USDC's own blacklist; the token is a fake USDC / EURC; or a brand-new address (check).

## Output

Returns a verdict of 'stop', 'check', or 'ok' along with a list of reasons explaining any risk flags. Reasons can include: the destination is a lookalike of a previously-used address (address poisoning), a bait address planted via a forged transfer, a known token contract or burn address, listed on OFAC SDN or USDC blacklist, a fake USDC/EURC token contract, or a brand-new address (triggering 'check').

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "queryParams"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "from",
      "to"
     ],
     "properties": {
      "to": {
       "type": "string",
       "pattern": "^0x[0-9a-fA-F]{40}$",
       "description": "The destination address to check before sending."
      },
      "from": {
       "type": "string",
       "pattern": "^0x[0-9a-fA-F]{40}$",
       "description": "The wallet that is about to send (its own history is checked for lookalikes)."
      }
     }
    }
   }
  },
  "output": {
   "type": "object"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/arc-send-guard-address-poisoning-check-6df9cf95/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from apexfaucet.xyz](https://www.zero.xyz/host/apexfaucet.xyz/llms.txt)