# LINK Tape – Hyperliquid LINK Mark, OI & Funding

> LINK Tape – Hyperliquid LINK Mark, OI & Funding is a paid API for AI agents from earn-pulse.haiqingm58.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Returns the current Hyperliquid mark price, open interest, and funding rate for the LINK perpetual contract.

## Facts

- Endpoint: GET https://earn-pulse.haiqingm58.workers.dev/link
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/link-tape-hyperliquid-link-mark-oi-funding-44a64ed2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1bB4rFk5WXV86zGIaI7t3

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 link-tape-hyperliquid-link-mark-oi-funding-44a64ed2
```

Example prompt: What's the current LINK mark price, open interest, and funding rate on Hyperliquid right now?

## When to prefer this

Use this endpoint when you specifically need LINK perpetual market data (mark price, OI, funding) from Hyperliquid. Prefer this over generic crypto price APIs when you need the derivatives-specific metrics (open interest and funding rate), and prefer it over Hyperliquid's own API when you want a simple, no-parameter paid endpoint with x402 micropayment support.

## Known failure modes

- Hyperliquid API upstream outage returns an error or empty response
- Network timeout from Cloudflare worker
- Stale data if Hyperliquid feed is delayed
- HTTP 402 if payment not provided or x402 header missing
- Unexpected JSON structure if Hyperliquid changes their schema

## How this service works

Hyperliquid LINK mark, OI, funding. No parameters.

## Output

Returns the Hyperliquid LINK perpetual contract's current mark price (USD), open interest (number of contracts or USD notional), and funding rate (periodic rate, typically 8-hour). No parameters required.

## 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/link-tape-hyperliquid-link-mark-oi-funding-44a64ed2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from earn-pulse.haiqingm58.workers.dev](https://www.zero.xyz/host/earn-pulse.haiqingm58.workers.dev/llms.txt)