# APEX Runner Slippage Forecast Signal

> APEX Runner Slippage Forecast Signal is a paid API for AI agents from apexrunner.ai, paid per call via x402, $0.007/call, status unknown (last checked 2026-09-14).

Forecasts expected slippage percentage and USD cost for a cryptocurrency trade of a given size and direction, with regime context and tranche recommendations.

## Facts

- Endpoint: GET https://apexrunner.ai/signals/slippage-forecast
- Price: $0.007/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/apex-runner-slippage-forecast-signal-5a01b813
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EgeHfXjaKKsy08enNOTey

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 apex-runner-slippage-forecast-signal-5a01b813
```

Example prompt: What's the expected slippage if I buy $50,000 worth of ETH right now — should I break it into tranches to reduce market impact?

## When to prefer this

Use this endpoint when you need a real-time, pre-trade slippage estimate for a specific cryptocurrency position size before executing — especially for large orders where market impact matters. Prefer this over generic spread estimators when you need regime-aware forecasts and tranche recommendations backed by live trading data. Best when trading AVAX, BTC, ETH, LINK, SOL, or XRP.

## Known failure modes

- Unsupported coin symbol returns validation error (coin must be one of AVAX, BTC, ETH, LINK, SOL, XRP)
- size_usd below minimum ($10) or above maximum ($1,000,000) returns parameter error
- Payment of 2.1 USDC not completed results in 402 Payment Required
- Signal may expire quickly (valid_for_seconds) and must be re-fetched for live trading
- Network or service unavailability returns 5xx error

## How this service works

APEX Runner: Slippage Forecast Signal

## Output

Returns forecasted slippage as a percentage and USD amount for the requested trade, along with a recommendation, current market regime, ATR percentage, suggested number of tranches to minimize impact, total estimated cost, current price, signal validity window in seconds, and APEX signal metadata including signal hash, version, and number of trades backing the signal.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "method"
   ],
   "properties": {
    "queryParams": {
     "type": "object",
     "properties": {
      "coin": {
       "enum": [
        "AVAX",
        "BTC",
        "ETH",
        "LINK",
        "SOL",
        "XRP"
       ],
       "type": "string",
       "default": "BTC"
      },
      "side": {
       "enum": [
        "buy",
        "sell"
       ],
       "type": "string",
       "default": "buy"
      },
      "size_usd": {
       "type": "number",
       "default": 1000,
       "maximum": 1000000,
       "minimum": 10
      }
     }
    }
   }
  },
  "output": {
   "type": "object",
   "properties": {
    "example": {
     "type": "object",
     "properties": {
      "coin": {
       "type": "string"
      },
      "side": {
       "type": "string"
      },
      "_apex": {
       "type": "object",
       "properties": {
        "signal": {
         "type": "string"
        },
        "source": {
         "type": "string"
        },
        "version": {
         "type": "string"
        },
        "instance": {
         "type": "string"
        },
        "verify_at": {
         "type": "string"
        },
        "signal_hash": {
         "type": "string"
        },
        "live_trading": {
         "type": "boolean"
        },
        "evolution_runs": {
         "type": "integer"
        },
        "live_capital_deployed": {
         "type": "boolean"
        },
        "trades_backing_signal": {
         "type": "integer"
        }
       }
      },
      "detail": {
       "type": "string"
      },
      "regime": {
       "type": "string"
      },
      "size_usd": {
       "type": "number"
      },
      "price_usd": {
       "type": "integer"
      },
      "timestamp": {
       "type": "string"
      },
      "market_atr_pct": {
       "type": "number"
      },
      "recommendation": {
       "type": "string"
      },
      "total_cost_usd": {
       "type": "number"
      },
      "valid_for_seconds": {
       "type": "integer"
      },
      "suggested_tranches": {
       "type": "integer"
      },
      "expected_slippage_pct": {
       "type": "number"
      },
      "expected_slippage_usd": {
       "type": "number"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "order_size_usd": 10000,
  "recommendation": "split_order",
  "liquidity_condition": "MODERATE",
  "expected_slippage_pct": 0.12
 },
 "order_size_usd": "float — order size used for slippage estimate in USD",
 "recommendation": "string — execute_now, split_order, or wait_for_liquidity",
 "slippage_cost_usd": "float — predicted slippage cost in USD",
 "liquidity_condition": "string — DEEP / MODERATE / THIN based on current order book depth",
 "expected_slippage_pct": "float — predicted slippage as percentage of order value"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/apex-runner-slippage-forecast-signal-5a01b813/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from apexrunner.ai](https://www.zero.xyz/host/apexrunner.ai/llms.txt)