# Fingerprint Resell Risk Check

> Fingerprint Resell Risk Check is a paid API for AI agents from apiwitchcraft.duckdns.org, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Checks whether a given request ID is associated with resell risk based on fingerprint signals.

## Facts

- Endpoint: GET https://apiwitchcraft.duckdns.org/fp-resell/check
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fingerprint-resell-risk-check-8890654a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_k6uk98tzl71zgtQ6iOrsY

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 fingerprint-resell-risk-check-8890654a
```

Example prompt: Can you run a fingerprint resell risk check on request ID 'abc-12345-xyz' to see if it's flagged as a potential scalper or resell bot?

## When to prefer this

Use this endpoint when you need to detect whether a specific request or purchase attempt is associated with resell or scalping risk based on fingerprint signals. Prefer this over generic fraud APIs when the use case is specifically resell/scalper bot detection tied to a fingerprinted request ID.

## Known failure modes

- Missing requestId parameter returns a validation error
- Invalid or unknown requestId returns not-found or empty result
- Service unavailable returns 5xx error
- Payment not processed returns 402 Payment Required

## How this service works

Device-fingerprint resale fraud check: submit a browser or device fingerprint and receive a risk signal showing whether that fingerprint has been resold or reused across many accounts — a strong indicator of account-takeover, bonus abuse, fake-account farming, and bot networks. Returns a fraud score, match count, and first/last-seen timestamps. Strengthens KYC, signup, and login defenses. (Paused pending API key; indexing resumes after first settled call.)

## Output

Returns a resell risk assessment for the given request ID, likely including a risk flag or score indicating whether the fingerprinted request exhibits resell or scalping behavior.

## 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"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "requestId"
     ],
     "properties": {
      "requestId": {
       "type": "string"
      }
     }
    }
   },
   "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/fingerprint-resell-risk-check-8890654a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from apiwitchcraft.duckdns.org](https://www.zero.xyz/host/apiwitchcraft.duckdns.org/llms.txt)