# Sentinel402 SMC Signal API

> Sentinel402 SMC Signal API is a paid API for AI agents from sentinel402.onrender.com, paid per call via x402, $0.01/call, status down (last checked 2026-09-15).

Returns Smart Money Concepts analysis for a trading symbol and timeframe, including market structure events, fair value gaps, liquidity pools/sweeps, and ICT session/kill zone status

## Facts

- Endpoint: POST https://sentinel402.onrender.com/v1/smc
- Price: $0.01/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sentinel402-smc-signal-api-23dd402e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hgodKd6FYrPyylaBayoZO

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 sentinel402-smc-signal-api-23dd402e -d '<json body>'
```

Example prompt: What's the current SMC analysis for BTCUSDT on the 15-minute chart — give me the market structure bias, any recent BOS or CHoCH, open fair value gaps, and whether we're in a kill zone right now?

## When to prefer this

Choose this endpoint when an agent needs ICT/Smart Money Concepts structured signals (BOS, CHoCH, FVG, liquidity) rather than generic OHLCV data or traditional indicators. Ideal for agents executing or advising on trades using institutional order flow methodology. Preferred over general-purpose market data APIs when the user specifically wants SMC or ICT-framework outputs with kill zone and session context.

## Known failure modes

- Payment not provided or insufficient USDC — 402 Payment Required response
- Invalid or unsupported symbol (e.g. non-existent pair) — error or empty result
- Unsupported timeframe value — validation error
- Service unavailable on Render cold start — timeout or 503
- Stale data if upstream price feed is delayed

## How this service works

Pay-per-call Smart Money Concepts: market structure (BOS/CHoCH), fair value gaps, liquidity pools & sweeps, ICT sessions/kill zones. Paid in USDC on Base via x402.

## Output

A JSON object containing: market structure bias (bullish/bearish) and last BOS or CHoCH event with price; an array of fair value gaps with top, bottom, CE price, type, and mitigation status; buy-side and sell-side liquidity pool levels with sweep status; recent liquidity sweeps; and the current ICT session name plus whether a named kill zone (e.g. London) is active. Also includes the symbol, timeframe, and Unix timestamp of the data.

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "fvg": [
   {
    "ce": 61315,
    "top": 61500,
    "type": "bearish",
    "bottom": 61130,
    "mitigated": false
   }
  ],
  "asOf": 1781507700,
  "symbol": "BTCUSDT",
  "sessions": {
   "current": "london",
   "killzone": {
    "name": "london",
    "active": true
   }
  },
  "liquidity": {
   "bsl": [
    {
     "kind": "equal",
     "price": 61850,
     "swept": true
    }
   ],
   "ssl": [],
   "recentSweeps": []
  },
  "structure": {
   "bias": "bearish",
   "lastEvent": {
    "type": "CHoCH",
    "price": 61150,
    "direction": "bearish"
   }
  },
  "timeframe": "15m"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sentinel402-smc-signal-api-23dd402e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from sentinel402.onrender.com](https://www.zero.xyz/host/sentinel402.onrender.com/llms.txt)