# QuantOracle Risk Correlation Matrix

> QuantOracle Risk Correlation Matrix is a paid API for AI agents from api.quantoracle.dev, paid per call via x402, $0.008/call, status unknown (last checked 2026-09-14).

Computes a pairwise correlation matrix and annualized volatilities for multiple asset return series

## Facts

- Endpoint: POST https://api.quantoracle.dev/v1/risk/correlation
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-quantoracle-dev-79940254
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LfnZWgJyBVm-kKUxxYYx-

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 api-quantoracle-dev-79940254 -d '<json body>'
```

Example prompt: Can you calculate the pairwise correlation matrix and volatilities for AAPL, MSFT, and GOOGL using these daily return series — AAPL: [0.01, -0.02, 0.005, 0.03], MSFT: [0.008, -0.015, 0.002, 0.025], GOOGL: [-0.001, 0.01, -0.005, 0.02]?

## When to prefer this

Use this endpoint when you need to quantify the statistical co-movement and individual volatility of multiple assets simultaneously from raw return data. It is ideal for portfolio construction, risk decomposition, diversification analysis, or building correlation heatmaps. Prefer this over general-purpose statistics libraries when you need a finance-aware, low-latency, pay-per-call cloud computation without managing infrastructure.

## Known failure modes

- Fewer than 2 assets provided — cannot compute pairwise matrix
- Return series of unequal length across assets — mismatched array sizes
- Empty or null series arrays — insufficient data error
- Single observation per asset — correlation undefined
- Non-numeric values in return arrays — parsing or validation error

## How this service works

QuantOracle: risk/correlation

## Output

Returns a square N×N correlation matrix across all submitted assets, per-asset annualized volatility estimates, the list of asset identifiers in matrix order, the number of observations used, and server-side computation time in milliseconds.

## Example request

```json
{
 "series": {
  "ASSET_A": [
   0.01,
   -0.02,
   0.005,
   0.03,
   0.015,
   -0.01,
   0.008,
   -0.015,
   0.002,
   0.025,
   0.012,
   -0.008,
   0.011,
   -0.018,
   0.004,
   0.028,
   0.014,
   -0.009,
   0.009,
   -0.016,
   0.003,
   0.026,
   0.013,
   -0.007,
   0.01,
   -0.017,
   0.006,
   0.029,
   0.011,
   -0.01
  ],
  "ASSET_B": [
   0.008,
   -0.015,
   0.002,
   0.025,
   0.012,
   -0.008,
   0.007,
   -0.012,
   0.001,
   0.022,
   0.01,
   -0.006,
   0.009,
   -0.014,
   0.003,
   0.024,
   0.011,
   -0.007,
   0.008,
   -0.013,
   0.002,
   0.023,
   0.009,
   -0.005,
   0.01,
   -0.015,
   0.004,
   0.026,
   0.012,
   -0.008
  ]
 }
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "series": {
   "type": "object",
   "title": "Series",
   "description": "Named return series, e.g. {\"AAPL\": [0.01, -0.02, ...], \"MSFT\": [...]}",
   "additionalProperties": {
    "type": "array",
    "items": {
     "type": "number"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-quantoracle-dev-79940254/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
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