# SignalHarness Market Volatility Analysis

> SignalHarness Market Volatility Analysis is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).

Analyzes caller-supplied market data or queries to assess and return a market volatility signal or assessment.

## Facts

- Endpoint: POST https://signalharness.ai/api/agent/services/market_volatility/invoke
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signalharness-market-volatility-analysis-61d870d9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_i1ejwJQ7yQjC1f5ch7y0j

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-market-volatility-analysis-61d870d9 -d '<json body>'
```

Example prompt: Can you assess market volatility based on this scenario: Bitcoin has dropped 12% in the last 24 hours with high trading volume and significant fear index readings — is the market considered highly volatile right now?

## When to prefer this

Choose this endpoint when you need a quick, pay-per-call volatility signal derived from a natural language or structured description of market conditions, and you are operating in an agent-native, x402-payment-capable environment. Prefer this over traditional financial data APIs when you don't have access to real-time market feeds but can describe market conditions in text, or when you need a lightweight volatility judgment rather than full quantitative modeling.

## Known failure modes

- Empty or too-short input string (below 2 chars) causes validation failure
- Input exceeds 65536 character limit causing rejection
- Malformed JSON request body returns error
- Payment failure via x402 protocol results in 402 response and no computation
- Ambiguous or nonsensical market description may produce low-confidence or warned output

## 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 market_volatility field containing the volatility assessment or signal, along with any warnings about data quality or scope limitations, an evidence_scope indicating the assessment is based on caller-supplied data, and a full receipt with payment confirmation, execution IDs, latency, and a result hash for verification.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "replay": false,
  "result": {
   "warnings": [
    "Volatility depends on supplied sampling and is not predictive."
   ],
   "service_id": "market_volatility",
   "evidence_scope": "caller_supplied_data",
   "market_volatility": "{\"annualization_factor\":365,\"mean\":\"0.023333333333333334\",\"sample\":true,\"variance\":\"0.005633333333333334\",\"volatility\":\"1.433933982673772478\"}"
  },
  "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": "market_volatility",
   "executionId": "example-execution",
   "startedAtMs": 0,
   "amountAtomic": "10000",
   "resultSha256": "c4d1fef7379538ad74a8520a430e35d5d5e844b14c77da8b0618e945f3180afe",
   "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-market-volatility-analysis-61d870d9/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)