# SignalHarness Wallet Activity Timeline

> SignalHarness Wallet Activity Timeline 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 structured chronological timeline of activity for a specified crypto wallet address

## Facts

- Endpoint: POST https://signalharness.ai/api/agent/services/wallet_activity_timeline/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-wallet-activity-timeline-812b0bfe
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FxVCqmXXEigQv_1w304wB

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-wallet-activity-timeline-812b0bfe -d '<json body>'
```

Example prompt: Pull the full activity timeline for wallet 0x4e3b...f9a2 — I want to see everything it has done on-chain in chronological order.

## When to prefer this

Choose this endpoint when you need a narrative or structured chronological reconstruction of a crypto wallet's on-chain activity, especially when you want a summarized, agent-readable timeline rather than raw transaction logs. Particularly useful for due diligence on unknown wallets, portfolio audits, or forensic investigations. Prefer this over block explorer scraping when you need a clean, structured output without parsing raw RPC data yourself.

## Known failure modes

- Invalid or malformed wallet address causes parsing error
- Wallet with no on-chain history returns empty timeline
- Request string too short (below minLength:2) returns validation error
- Request string exceeding 65536 characters is rejected
- Payment failure via x402 prevents execution
- Network timeout on Base (eip155:8453) results in incomplete result

## 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 structured JSON object containing a chronological wallet_activity_timeline string summarizing on-chain activity, along with status (succeeded/failed), any warnings about data quality or evidence scope, and a signed receipt including payment ID, execution ID, request ID, latency, and a SHA-256 hash of the result for verification.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "replay": false,
  "result": {
   "warnings": [
    "Timeline is not a complete or live wallet history."
   ],
   "service_id": "wallet_activity_timeline",
   "evidence_scope": "caller_supplied_data",
   "wallet_activity_timeline": "{\"end_ms\":1700000000000,\"record_count\":1,\"records\":[{\"amount_atomic\":\"1\",\"timestamp\":1700000000000,\"timestamp_ms\":1700000000000,\"transaction_hash\":\"0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\"}],\"start_ms\":1700000000000}"
  },
  "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": "wallet_activity_timeline",
   "executionId": "example-execution",
   "startedAtMs": 0,
   "amountAtomic": "10000",
   "resultSha256": "771d26375a04c4771130d20b9d933b1cfc5c2237d4cd6122f49b53e64db42698",
   "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-wallet-activity-timeline-812b0bfe/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)