# MNVI — Mycelia NQ Volatility Index (NDX/USD)

> MNVI — Mycelia NQ Volatility Index (NDX/USD) is a paid API for AI agents from api.myceliasignal.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Returns a 0-100 composite volatility index for the Nasdaq-100 (NQ), combining NDX realized volatility, VIX term structure, vol beta, VVIX, and NDX momentum, with Ed25519-signed attestation.

## Facts

- Endpoint: GET https://api.myceliasignal.com/oracle/volatility/nq/usd
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mnvi-mycelia-nq-volatility-index-ndx-usd-facd338d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Ja1_Wkeq2cEtgA0zXwZzL

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 mnvi-mycelia-nq-volatility-index-ndx-usd-facd338d
```

Example prompt: What's the current MNVI composite volatility score for the Nasdaq-100 right now — I need the 0-100 index value along with the underlying components like realized vol and VIX term structure, and I want the Ed25519 signed attestation so I can verify the data is authentic.

## When to prefer this

Use this endpoint when you need a single, normalized composite volatility score for NQ/Nasdaq-100 trading decisions, risk management, or regime detection — especially when cryptographic attestation is required for auditability. Prefer over raw VIX or RV30 feeds when you want a multi-factor signal already blended and signed.

## Known failure modes

- Payment not provided or invalid USDC — 402 Payment Required
- Upstream data source unavailable — 503 or stale cached data returned
- Invalid request format or unsupported method — 400 Bad Request
- Signature verification failure on client side if attestation key has rotated

## How this service works

MNVI — Mycelia NQ Volatility Index. NDX RV30, VIX term structure, vol beta, VVIX, NDX momentum. 0-100 composite. 300s cache. — Ed25519 signed attestation

## Output

A 0-100 composite MNVI score reflecting current Nasdaq-100 volatility regime, built from NDX 30-day realized volatility, VIX term structure, volatility beta, VVIX, and NDX momentum. Response is cached for 300 seconds and includes an Ed25519 cryptographic signature for tamper-proof attestation.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mnvi-mycelia-nq-volatility-index-ndx-usd-facd338d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.myceliasignal.com](https://www.zero.xyz/host/api.myceliasignal.com/llms.txt)