# MyeliaSignal MSXI ETH/USD Sentiment Index History

> MyeliaSignal MSXI ETH/USD Sentiment 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 2026-09-14).

Returns 60 days of MSXI (MyeliaSignal sentiment index) historical data for ETH/USD, with per-row Ed25519 cryptographic signatures for attestation.

## Facts

- Endpoint: GET https://api.myceliasignal.com/oracle/history/index/msxi/ethusd
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/myeliasignal-msxi-eth-usd-sentiment-index-history-a01e9d3b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_c_qvJLViRBArlkXO7mZuG

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-msxi-eth-usd-sentiment-index-history-a01e9d3b
```

Example prompt: Pull the last 60 days of MSXI sentiment index history for ETH/USD from MyeliaSignal — I want the signed attestation rows so I can verify each data point cryptographically.

## When to prefer this

Choose this endpoint when you need historical ETH/USD sentiment trend data backed by cryptographic attestation — especially useful for on-chain applications, audits, or any workflow requiring tamper-evident provenance on each individual data row. Prefer over generic sentiment APIs when verifiability matters.

## Known failure modes

- Payment required (402): missing or invalid x402 USDC payment header
- Invalid endpoint or asset pair returns 404
- Upstream data unavailability returns 503 or empty result set
- Signature verification failure if response is tampered in transit

## How this service works

MSXI sentiment index history for ETH — 60 days, per-row original signatures. — Ed25519 signed attestation

## Output

An array of up to 60 daily MSXI sentiment index entries for ETH/USD, where each row includes the index value, timestamp, and an individual Ed25519 cryptographic signature allowing independent verification of each data point's authenticity.

## 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-msxi-eth-usd-sentiment-index-history-a01e9d3b/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)