# SignalHarness Bitcoin Locktime Interpreter

> SignalHarness Bitcoin Locktime Interpreter is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-16).

Interprets Bitcoin locktime values from raw transaction data or text, explaining their meaning, type, and any associated warnings.

## Facts

- Endpoint: POST https://signalharness.ai/api/agent/services/bitcoin_locktime_interpret/invoke
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signalharness-bitcoin-locktime-interpreter-0682ea49
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MwevQVWo7HZuwxhR63rJY

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-bitcoin-locktime-interpreter-0682ea49 -d '<json body>'
```

Example prompt: Can you interpret this Bitcoin locktime value for me — '500000' — and tell me whether it's a block height or a Unix timestamp, and if there are any warnings I should know about?

## When to prefer this

Choose this endpoint when you need a reliable, structured interpretation of a Bitcoin locktime value — especially when you need machine-readable output with explicit warnings and a verifiable receipt. Prefer it over manual lookup when integrating locktime analysis into an automated agent pipeline that requires audit trails, or when you need to distinguish block-height vs. timestamp semantics programmatically.

## Known failure modes

- Empty or malformed locktime string causes parsing failure
- Input outside valid Bitcoin locktime range may produce warnings or errors
- Ambiguous values near the block-height/timestamp boundary (500,000,000) may yield uncertain interpretations
- Network or payment settlement failures return non-succeeded status in receipt
- Overly long input (exceeding 65536 chars) rejected by schema validation

## 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 response with a human-readable interpretation of the Bitcoin locktime value, a list of any warnings (e.g. ambiguous values, edge cases), the evidence scope indicating the data was caller-supplied, and a full receipt with payment and execution metadata including service ID, network, latency, and a SHA-256 hash of the result.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "replay": false,
  "result": {
   "warnings": [
    "Interpretation does not prove transaction eligibility or chain state."
   ],
   "service_id": "bitcoin_locktime_interpret",
   "evidence_scope": "caller_supplied_data",
   "bitcoin_locktime_interpretation": "{\"final_sequence_count\":0,\"kind\":\"block_height\",\"locktime\":500,\"locktime_enabled\":true,\"replace_by_fee_signaled\":false}"
  },
  "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": "bitcoin_locktime_interpret",
   "executionId": "example-execution",
   "startedAtMs": 0,
   "amountAtomic": "5000",
   "resultSha256": "da0612cca10364dc73ed4232e4e48b5c4002957e05f0bc0ee4685ee7a7958891",
   "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-bitcoin-locktime-interpreter-0682ea49/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)