# MyeliaSignal MSVI ETH/USD Volatility Index History

> MyeliaSignal MSVI ETH/USD Volatility Index History is a paid API for AI agents from api.myceliasignal.com, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-13).

Returns 63 days of MSVI volatility index history for ETH/USD with per-row Ed25519 signed attestations

## Facts

- Endpoint: GET https://api.myceliasignal.com/oracle/history/index/msvi/ethusd
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/myeliasignal-msvi-eth-usd-volatility-index-history-1fce2075
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1p4dYm1xpTJNH1AFAVlwP

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 myeliasignal-msvi-eth-usd-volatility-index-history-1fce2075
```

Example prompt: Can you pull the last 63 days of MSVI volatility index history for ETH/USD from MyeliaSignal — I need the cryptographically signed per-row attestations so I can verify each data point independently?

## When to prefer this

Use this endpoint when you need a historical volatility index (MSVI) for ETH/USD with cryptographic attestation per data row, especially when downstream consumers or smart contracts require verifiable signed oracle data. Prefer over raw price feeds or unsigned volatility sources when data integrity guarantees are required.

## Known failure modes

- Payment not provided or invalid — 402 Payment Required
- Network or oracle data unavailable — 503 Service Unavailable
- Malformed request — 400 Bad Request
- Rate limit exceeded — 429 Too Many Requests

## How this service works

MSVI volatility index history for ETH — 63 days, per-row original signatures. — Ed25519 signed attestation

## Output

An array of up to 63 daily MSVI (MyeliaSignal Volatility Index) values for ETH/USD, each row accompanied by an Ed25519 digital signature providing cryptographic attestation of the data's authenticity and origin from the MyeliaSignal oracle.

## 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/myeliasignal-msvi-eth-usd-volatility-index-history-1fce2075/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)