# CrossChain Wallet Activity Comparator

> CrossChain Wallet Activity Comparator is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.025/call, status unknown (last checked 2026-09-15).

Compares and analyzes wallet activity across multiple blockchain networks (Solana, Base, Polygon) to identify transaction patterns, counterparties, and cross-chain behavior.

## Facts

- Endpoint: POST https://signalharness.ai/api/agent/services/crosschain_wallet_activity_compare/invoke
- Price: $0.025/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/crosschain-wallet-activity-comparator-aff5025d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_eewJRVfAYHfffcCX-eP4t

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 crosschain-wallet-activity-comparator-aff5025d -d '<json body>'
```

Example prompt: Can you compare the onchain activity of wallet 0xABC...123 across Base, Solana, and Polygon — I want to see transaction counts, fees, and counterparties broken down by chain?

## When to prefer this

Use this endpoint when you need to compare wallet behavior across multiple heterogeneous blockchains (Solana, Base, Polygon) in a single call. Prefer it over single-chain explorers when the user wants a unified cross-chain view, or when you need to assess whether addresses on different networks might share an owner. It is especially useful for DeFi due diligence, wallet auditing, and cross-chain activity aggregation.

## Known failure modes

- Invalid or malformed wallet address returns an error or empty result
- Unsupported chain identifier results in that chain being omitted from analysis
- No on-chain data found for an address returns zero transactions with warnings
- Malformed request_json string causes a parsing error
- Rate limiting or payment failure (x402) prevents execution

## How this service works

Explore 330 pay-per-call x402 API services and 27 agent-native digital products, with Base USDC pricing, secure Polar checkout, and free discovery.

## Output

Returns a JSON analysis broken down by chain, including transaction counts, number of unique wallets, counterparty counts, fee details, and an overall ownership assumption flag. Also includes a list of wallet-level summaries with per-chain stats and an indication of which networks were analyzed (e.g. Solana, Base, Polygon).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "request_json": {
   "type": "string",
   "maxLength": 65536,
   "minLength": 2
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "replay": false,
  "result": {
   "warnings": [
    "Addresses are not assumed to share an owner across chains."
   ],
   "service_id": "crosschain_wallet_activity_compare",
   "analysis_json": "{\"by_chain\":{\"base\":{\"transactions\":\"1\",\"wallets\":1}},\"ownership_assumed\":false,\"wallets\":[{\"address\":\"0x0000000000000000000000000000000000000001\",\"chain\":\"base\",\"counterparties\":\"0\",\"fee_amount\":null,\"fee_unit\":null,\"index\":0,\"transactions\":\"1\"}]}",
   "evidence_scope": "caller_supplied_data",
   "analyzed_network": "solana_base_polygon"
  },
  "status": "succeeded",
  "receipt": {
   "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
   "usage": [],
   "status": "succeeded",
   "network": "eip155:8453",
   "artifacts": [],
   "endedAtMs": 0,
   "latencyMs": 0,
   "paymentId": "example-payment",
   "receiptId": "example-receipt",
   "requestId": "example-request",
   "serviceId": "crosschain_wallet_activity_compare",
   "executionId": "example-execution",
   "startedAtMs": 0,
   "amountAtomic": "25000",
   "resultSha256": "64740c85f2894f7bcbf22bbe4880494d000f055d5470d4ead059a920d2621826",
   "serviceVersion": "1.0.0",
   "settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
  },
  "artifacts": [],
  "requestId": "example-request",
  "executionId": "example-execution"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/crosschain-wallet-activity-comparator-aff5025d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from signalharness.ai](https://www.zero.xyz/host/signalharness.ai/llms.txt)