# MyeliaSignal MSXI Sentiment Index History (BTC/USD)

> MyeliaSignal MSXI Sentiment Index History (BTC/USD) 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 sentiment index history for BTC/USD, including regime classification, component breakdowns, confidence scores, and per-row Ed25519 signed attestations.

## Facts

- Endpoint: GET https://api.myceliasignal.com/oracle/history/index/msxi/btcusd
- 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-sentiment-index-history-btc-usd-d26fd16c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wm3JsdlQU2Hz6KGCY0Ump

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-sentiment-index-history-btc-usd-d26fd16c
```

Example prompt: Pull the last 60 days of MSXI sentiment index history for BTC/USD — I need the regime labels, component scores, and confidence values, and I want each row to include its Ed25519 signature so I can verify the data integrity.

## When to prefer this

Choose this endpoint when you need a cryptographically attested, historically rich (60-day) sentiment signal for BTC/USD with structured regime and component breakdown — particularly for oracle-driven smart contracts, verifiable data pipelines, or any use case requiring tamper-evident financial sentiment provenance. Prefer over raw price feeds when the regime classification and confidence scoring are important.

## Known failure modes

- Payment not provided or invalid — endpoint requires $0.1 USDC via x402 payment protocol
- Invalid or unsupported trading pair in URL path
- Service unavailable — upstream data source unreachable
- Fewer than 60 days of history available if service is newly launched
- Ed25519 signature verification failure on client side if public key is mismatched

## How this service works

MSXI sentiment index history — 60 days, per-row original signatures. Regime, components, confidence. — Ed25519 signed attestation

## Output

An array of up to 60 daily rows for BTC/USD MSXI sentiment index, each containing: the sentiment index value, regime classification (e.g. risk-on/risk-off), individual component scores, confidence level, and a per-row Ed25519 cryptographic signature for tamper-evident 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/myeliasignal-msxi-sentiment-index-history-btc-usd-d26fd16c/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)