# ChainWard Seller Demand Risk Analysis

> ChainWard Seller Demand Risk Analysis is a paid API for AI agents from api.chainward.ai, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-12).

Analyzes on-chain USDC flow patterns for a Base address to detect seller-funded buyer activity and common funder signals indicating potential wash trading or artificial demand.

## Facts

- Endpoint: GET https://api.chainward.ai/api/risk/seller-demand?utm_source=zero.xyz
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/chainward-seller-demand-risk-analysis-a29d246f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DGnVpDolT7OV0Ee3Ic7B0

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 chainward-seller-demand-risk-analysis-a29d246f
```

Example prompt: Can you check if the seller at 0x68396bd35874695ad86cd29410bd80a550991a2b on Base is artificially funding their own buyers — I want to see the on-chain USDC trace signals and whether there's a common funder behind most of the top buyers?

## When to prefer this

Choose this endpoint when you need forensic on-chain evidence of whether a seller on Base is artificially inflating demand by funding their own buyers. It is purpose-built for Base network USDC flow tracing across buyer hops, making it more specific than generic blockchain analytics tools. Prefer it over broad on-chain explorers when you need structured risk signals with evidence strings ready for agent consumption, especially in marketplace due diligence, AI agent economy vetting, or DeFi fraud detection workflows.

## Known failure modes

- Invalid or malformed address (not matching ^0x[a-fA-F0-9]{40}$) returns validation error
- Address with no on-chain activity may return empty signals or zero buyers
- Rate limiting or payment failure (x402) if USDC payment not properly attached
- Network congestion on Base may delay trace resolution
- Very new addresses with insufficient transaction history may return inconclusive results

## How this service works

Paste any Base or BNB Chain address before you pay or hire it. ChainWard tells you Pay or Hold, and why, from the wallet’s on-chain history. Free.

## Output

Returns a JSON object with: detected risk signals (e.g. 'buyers_funded_by_seller', 'common_funder') each with a title and evidence string; aggregate stats including number of buyers checked, how many are reached within N hops of the seller, volume share, top buyer share, paid-back share; the address of the most common first funder; a 30-day rolling window; and a disclaimer clarifying this describes USDC movement, not intent.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "chain": {
       "enum": [
        "base",
        "bsc"
       ],
       "type": "string",
       "default": "base",
       "description": "Chain the address is on. Payment is USDC on Base either way."
      },
      "address": {
       "type": "string",
       "pattern": "^0x[a-fA-F0-9]{40}$",
       "description": "Address to check"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {
   "sample": {
    "buyers": 500,
    "capped": true,
    "inflow_transfers": 1000
   },
   "address": "0x68396bd35874695ad86cd29410bd80a550991a2b",
   "signals": [
    {
     "id": "buyers_funded_by_seller",
     "title": "Most checked buyers' USDC traces back to this address",
     "evidence": "30 of 30 top buyers reach this address within 3 hops of their largest funders (100% of their volume)."
    },
    {
     "id": "common_funder",
     "title": "One wallet funds most checked buyers",
     "evidence": "0x82b551e820efc3503a3a27fc450e07e328daf91c is the largest funder of 50% of the top buyers checked."
    }
   ],
   "disclaimer": "Describes where stablecoins moved on this chain, not why. A common funder can be a legitimate faucet, exchange or custodian. Not a safety verdict.",
   "walk_stops": {},
   "window_days": 30,
   "seller_funded": {
    "hops": {
     "3": 30
    },
    "buyers": 30,
    "volume_share": 1
   },
   "buyers_checked": 30,
   "proxied_payers": [],
   "paid_back_share": 0,
   "top_buyer_share": 0.037,
   "common_first_funder": {
    "address": "0x82b551e820efc3503a3a27fc450e07e328daf91c",
    "buyer_share": 0.5
   },
   "via_intermediary_share": 0
  },
  "success": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/chainward-seller-demand-risk-analysis-a29d246f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.chainward.ai](https://www.zero.xyz/host/api.chainward.ai/llms.txt)