# MycaliaSignal BTC/USD Open Interest Oracle

> MycaliaSignal BTC/USD Open Interest Oracle is a paid API for AI agents from api.myceliasignal.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Returns aggregated BTC/USD open interest across 5 exchanges with 1h, 4h, and 24h deltas, delivered as an Ed25519-signed cryptographic attestation

## Facts

- Endpoint: GET https://api.myceliasignal.com/oracle/oi/btc/usd
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mycaliasignal-btc-usd-open-interest-oracle-b5d1941b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rGU3tNynu3P-ZhxaV1ZhE

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 mycaliasignal-btc-usd-open-interest-oracle-b5d1941b
```

Example prompt: Pull the current BTC/USD open interest across exchanges — I need the signed attestation with the 1h, 4h, and 24h deltas so I can verify the data on-chain.

## When to prefer this

Choose this endpoint when you need cryptographically verifiable BTC/USD open interest data suitable for on-chain use, smart contract oracles, or any workflow requiring tamper-evident proof of data provenance. Prefer it over unauthenticated data feeds when auditability or trustless verification is required. The multi-exchange aggregation (5 sources) and three delta windows make it especially useful for DeFi liquidation risk monitoring, funding rate strategies, and market sentiment analysis.

## Known failure modes

- Exchange data unavailable — one or more of the 5 upstream exchanges may be unreachable, potentially resulting in partial or stale data
- Payment not processed — x402 payment of $0.01 USDC required; missing or invalid payment returns 402
- Rate limiting — excessive calls may be throttled
- Signature verification failure — consumer-side Ed25519 key mismatch may cause attestation rejection

## How this service works

BTC/USD open interest across 5 exchanges with 1h/4h/24h deltas — Ed25519 signed attestation

## Output

A signed JSON payload containing aggregated BTC/USD open interest across 5 exchanges, including delta values for 1-hour, 4-hour, and 24-hour windows, and an Ed25519 cryptographic signature that allows downstream consumers (smart contracts, oracles, auditors) to verify the authenticity and integrity of the data without trusting the transport layer.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {}
 }
}
```

## 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/mycaliasignal-btc-usd-open-interest-oracle-b5d1941b/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)