# SignalHarness Multichain Address Profile

> SignalHarness Multichain Address Profile is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-16).

Generates a comprehensive cross-chain profile for a blockchain address, aggregating on-chain data across multiple networks.

## Facts

- Endpoint: POST https://signalharness.ai/api/agent/services/multichain_address_profile/invoke
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signalharness-multichain-address-profile-540fb782
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZbiM_FBhMlVu5yOhkZ-7y

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 signalharness-multichain-address-profile-540fb782 -d '<json body>'
```

Example prompt: Can you pull a multichain address profile for 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 — I want to see its activity across all supported chains?

## When to prefer this

Choose this endpoint when you need a unified, cross-chain view of a single blockchain address rather than querying individual chain explorers. It is especially valuable for compliance screening, wallet due diligence, and portfolio audits where activity spans multiple networks. Prefer it over single-chain block explorers when the address type is unknown or when the user needs a quick aggregated summary rather than deep single-chain transaction history.

## Known failure modes

- Invalid or malformed address string returns an error or empty profile
- Unsupported chain or address format may return warnings rather than hard errors
- Payment failure via x402 protocol results in 402 response before execution
- Rate limiting or upstream data provider outages may cause timeouts
- Very new or inactive addresses may return minimal profile data with warnings

## 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 object containing a multichain_address_profile field with aggregated cross-chain data for the requested address, a status indicating success, any warnings about data quality or limitations, an evidence_scope label indicating the data source, and a full execution receipt including payment ID, latency, network details, and a SHA-256 result hash for verification.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "replay": false,
  "result": {
   "warnings": [
    "Profile uses supplied records only and is not a balance or activity lookup."
   ],
   "service_id": "multichain_address_profile",
   "evidence_scope": "caller_supplied_data",
   "multichain_address_profile": "{\"invalid\":0,\"records\":[{\"index\":0,\"kind\":\"evm\",\"normalized\":\"0x0000000000000000000000000000000000000001\",\"valid\":true},{\"index\":1,\"kind\":\"solana\",\"normalized\":\"11111111111111111111111111111111\",\"valid\":true}],\"total\":2,\"valid\":2}"
  },
  "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": "multichain_address_profile",
   "executionId": "example-execution",
   "startedAtMs": 0,
   "amountAtomic": "10000",
   "resultSha256": "59f29efce5d850b37b03e2f0f43ad4efd8ca84c4afde5084b873f0464a525a29",
   "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/signalharness-multichain-address-profile-540fb782/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)