# NFT Collection Risk Assessment (Wash Trading + Holder Distribution)

> NFT Collection Risk Assessment (Wash Trading + Holder Distribution) is a paid API for AI agents from defi-shield-hazel.vercel.app, paid per call via x402, $0.5/call, status unknown (last checked 2026-09-16).

Assesses risk of an NFT collection by detecting wash trading patterns and analyzing holder distribution concentration

## Facts

- Endpoint: POST https://defi-shield-hazel.vercel.app/api/nft/collection-risk
- Price: $0.5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/defi-shield-hazel-vercel-app-19998c4e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_96i6pYxNno397eF31bGCw

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 defi-shield-hazel-vercel-app-19998c4e -d '<json body>'
```

Example prompt: Can you run a risk assessment on the Azuki NFT collection at contract address 0xED5AF388653567Af2F388E6224dC7C4b3241C544 on Ethereum — I want to know if there's wash trading happening and whether the holder distribution looks healthy before I consider buying.

## When to prefer this

Use this endpoint when you need a combined wash-trading and holder-distribution risk signal for an NFT collection in a single call, particularly for due diligence before an NFT purchase or investment decision. Prefer this over generic on-chain analytics when you want a pre-computed risk score rather than raw transaction data.

## Known failure modes

- Invalid or unrecognized contract address returns an error
- Collection not indexed or too new returns insufficient data error
- Unsupported blockchain network returns unsupported chain error
- Rate limiting or payment failure returns 402 or 429 status
- Network RPC unavailability causes timeout or partial data response

## Output

Returns a structured risk report including a composite risk score, wash trading detection signals (e.g. circular trades, repeated buyer-seller pairs, suspicious volume patterns), and holder distribution analysis (e.g. top holder concentration percentages, whale dominance, Gini coefficient) to help evaluate collection legitimacy and investment risk.

## Example request

```json
{
 "input": {
  "body": {
   "chain": "base",
   "collection_address": "0xED5AF388653567Af2F388E6224dC7C4b3241C544"
  },
  "type": "http",
  "method": "POST",
  "bodyType": "json"
 }
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "bodyType",
    "body",
    "method"
   ],
   "properties": {
    "body": {
     "properties": {
      "chain": {
       "type": "string",
       "description": "Chain (default: base)"
      },
      "collection_address": {
       "type": "string",
       "description": "NFT collection contract address"
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "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/defi-shield-hazel-vercel-app-19998c4e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from defi-shield-hazel.vercel.app](https://www.zero.xyz/host/defi-shield-hazel.vercel.app/llms.txt)