# Wallet Cluster Detection — USDC Funding Source & Sibling Address Finder

> Wallet Cluster Detection — USDC Funding Source & Sibling Address Finder is a paid API for AI agents from api.x402node.dev, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-13).

Given a seed wallet address, traces its USDC funding source backwards and identifies sibling addresses funded by the same source within the last 30 days, returning cluster metadata and pattern classification.

## Facts

- Endpoint: GET https://api.x402node.dev/wallet/cluster
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-x402node-dev-46d50dad
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Bn04uG5HKCSHZ4NeyDvHq

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 api-x402node-dev-46d50dad
```

Example prompt: Can you check if the wallet 0x1234...abcd is part of a sybil cluster? I want to know its USDC funder, how many sibling addresses were funded by the same source in the last 30 days, and whether it's classified as a burner cluster or linked addresses.

## When to prefer this

Use this endpoint when you need to perform sybil detection, airdrop farming investigation, or source-of-funds compliance checks on Ethereum or EVM-compatible wallets that transact in USDC. It is specifically designed to trace USDC funding lineage and surface sibling wallet clusters — prefer it over general blockchain explorers when you need structured cluster classification and sibling enumeration in a single call.

## Known failure modes

- No USDC funding found for the seed address — returns pattern_classification: no_funding_found
- Invalid or malformed wallet address input — likely 4xx error
- Seed address has no on-chain USDC history within detectable range
- More than 50 siblings truncated to first 50 in results
- RPC or upstream data provider timeout causing incomplete cluster trace

## How this service works

Detect wallet cluster: given seed address, trace USDC funding source backwards then find sibling addresses funded by same source within last 30 days. Returns funder address, first funding tx, cluster_size, siblings array (up to 50), pattern classification (burner_cluster, linked_addresses, single_sibling, no_funding_found). For sybil detection, treasury monitoring, source-of-funds analysis. Accepts payment on Base or Solana — either network works.

## Output

Returns a JSON object containing: the funder address that sent USDC to the seed wallet, the first funding transaction hash, cluster_size (number of related wallets), a siblings array of up to 50 sibling wallet addresses funded by the same source within the last 30 days, and a pattern_classification enum value (burner_cluster, linked_addresses, single_sibling, or no_funding_found).

## 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": [
      "seed"
     ],
     "properties": {
      "seed": {
       "type": "string",
       "description": "Seed (required)"
      },
      "depth": {
       "type": "string",
       "description": "Traversal depth (optional)"
      },
      "toAddress": {
       "type": "string",
       "description": "ToAddress (optional)"
      },
      "fromAddress": {
       "type": "string",
       "description": "FromAddress (optional)"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-x402node-dev-46d50dad/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.x402node.dev](https://www.zero.xyz/host/api.x402node.dev/llms.txt)