# Perp Open Interest & OI-to-Volume Signal (Hyperliquid)

> Perp Open Interest & OI-to-Volume Signal (Hyperliquid) is a paid API for AI agents from derivatives.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).

Returns open interest in USD, OI-to-volume ratio, and OI rank for a Hyperliquid perpetual, flagging leveraged build-up conditions.

## Facts

- Endpoint: GET https://derivatives.x402tookit.com/open-interest?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/perp-open-interest-oi-to-volume-signal-hyperliquid-01c1836d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jUwaU2Q0uNjtlvOeplu3z

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 perp-open-interest-oi-to-volume-signal-hyperliquid-01c1836d
```

Example prompt: Check the open interest and OI-to-volume ratio for BTC on Hyperliquid and tell me if there's a leveraged build-up flagged.

## When to prefer this

Choose this endpoint when you specifically need open interest magnitude, OI-to-volume ratio, and OI rank for a single Hyperliquid perpetual to detect leveraged build-up. Prefer sibling endpoints for funding rate crowding, squeeze risk composite signals, or cross-venue comparisons. Use this endpoint as a focused, low-cost ($0.02) OI-specific data point rather than the full one-call snapshot.

## Known failure modes

- Invalid or unlisted ticker symbol returns an error or null fields
- Hyperliquid data unavailable causes degraded=true with partial results
- Missing required 'coin' query parameter causes a 400-level error
- Network timeout or upstream Hyperliquid API outage returns an error response

## How this service works

Perp open interest in USD, OI-to-volume ratio and rank on Hyperliquid. Flags leveraged build-up.

## Output

Returns the coin's open interest in USD and in contracts, 24h volume in USD, OI-to-volume ratio, OI rank by open interest, a verdict string (e.g. 'elevated', 'normal'), human-readable reasons explaining the verdict, thresholds used (highRatio, normalRatio), a summary sentence, data timestamp, source URL, and a degraded flag if data quality is reduced.

## 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",
     "required": [
      "coin"
     ],
     "properties": {
      "coin": {
       "type": "string",
       "description": "Hyperliquid ticker, e.g. BTC, SOL"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "asOf": {
       "type": [
        "null",
        "string"
       ]
      },
      "coin": {
       "type": [
        "null",
        "string"
       ]
      },
      "source": {
       "type": [
        "null",
        "string"
       ]
      },
      "reasons": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "summary": {
       "type": [
        "null",
        "string"
       ]
      },
      "verdict": {
       "type": [
        "null",
        "string"
       ]
      },
      "degraded": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "sourceUrl": {
       "type": [
        "null",
        "string"
       ]
      },
      "disclaimer": {
       "type": [
        "null",
        "string"
       ]
      },
      "notChecked": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "thresholds": {
       "type": [
        "null",
        "object"
       ],
       "properties": {
        "highRatio": {
         "type": [
          "null",
          "number"
         ]
        },
        "normalRatio": {
         "type": [
          "null",
          "number"
         ]
        }
       }
      },
      "ofContracts": {
       "type": [
        "null",
        "number"
       ]
      },
      "volume24hUsd": {
       "type": [
        "null",
        "number"
       ]
      },
      "oiToVolumeRatio": {
       "type": [
        "null",
        "number"
       ]
      },
      "openInterestUsd": {
       "type": [
        "null",
        "number"
       ]
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/perp-open-interest-oi-to-volume-signal-hyperliquid-01c1836d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from derivatives.x402tookit.com](https://www.zero.xyz/host/derivatives.x402tookit.com/llms.txt)