# Vaunt ARB Trading Cost on Hyperliquid

> Vaunt ARB Trading Cost on Hyperliquid is a paid API for AI agents from vaunt-dispatch-production.up.railway.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Returns real-fill execution quality metrics for trading ARB on Hyperliquid: slippage (p50/p90 bps), taker fee, fill latency, fill rate, spread, round-trip cost, 1% depth, and funding APR.

## Facts

- Endpoint: GET https://vaunt-dispatch-production.up.railway.app/agent/x402/cost/ARB
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vaunt-arb-trading-cost-on-hyperliquid-c3d13e5a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9cfK42nP3bmNeqS56IQSw

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 vaunt-arb-trading-cost-on-hyperliquid-c3d13e5a
```

Example prompt: What's the real cost of trading ARB on Hyperliquid right now — I want actual fill data: slippage at p50 and p90, taker fee, how long fills take, fill rate, and the round-trip cost compared to the venue median.

## When to prefer this

Choose this endpoint when you need real-fill (not quoted) execution quality data specifically for ARB on Hyperliquid, including slippage from actual IOC taker orders, fill latency, fill rate, depth, and funding APR. Prefer this over generic market data APIs when you need venue-specific microstructure metrics measured from live trades rather than theoretical order book snapshots.

## Known failure modes

- Payment not provided or insufficient — returns 402 Payment Required
- Hyperliquid venue temporarily unavailable — stale or missing data
- ARB market halted or delisted — endpoint may return error or empty metrics
- Rate limit exceeded — returns 429 Too Many Requests
- Network timeout reaching Railway-hosted service — returns 5xx error

## How this service works

True cost of trading ARB on Hyperliquid, measured on Vaunt's own IOC taker orders: slippage vs mid (p50/p90 bps), taker fee paid, wall-clock to fill, fill rate, against the venue-class median, plus spread, round-trip cost, depth within 1% and funding APR. Real fills, not quotes.

## Output

A structured response containing real-fill execution quality metrics for ARB on Hyperliquid: median (p50) and 90th-percentile (p90) slippage in basis points versus mid, taker fee paid, wall-clock time to fill, fill rate, spread, round-trip cost, order book depth within 1% of mid, funding APR, and a comparison against the venue-class median — all derived from Vaunt's own live IOC taker orders.

## 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/vaunt-arb-trading-cost-on-hyperliquid-c3d13e5a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from vaunt-dispatch-production.up.railway.app](https://www.zero.xyz/host/vaunt-dispatch-production.up.railway.app/llms.txt)