NUXN Crypto Buy/Sell Signal API

Real-time buy and sell signals for the full nuxn.com market universe: 609,180 pairs (matching every one of the 609,180 public sitemap pairs) across 9 timeframes using four proven technical analysis methods: Supertrend, NUXN Supertrend (NST), Heikin Ashi (with configurable sensitivity), and Renko, powered by exchange-aggregated price data.

Features

609,180 Callable Pairs in four orientations:
- Crypto to currency (101,640) + BTC/USD, ETH/USD, XMR/USD, XAG/USD, ...
- Currency to crypto (101,640) + USD/BTC, EUR/ETH, JPY/XAG, ...
- Crypto to crypto (378,840) + BTC/ETH, ETH/SOL, DOGE/XRP, ...
- Currency to currency (27,060) + EUR/USD, GBP/JPY, USD/CHF, ...
609,180 pairs exactly match the public nuxn.com sitemap
9 Timeframes + 1s, 1min, 5m, 15m, 30m, 1h, 4h, 1d, 1w
4 Signal Methods:
- Supertrend + ATR-based trend following with configurable band multiplier (0.01–3.0), default 2.5
- NUXN Supertrend (NST) + Dual-band supertrend with inner (band_start) and outer (band_end) ATR bands. Default 1.0/2.5
- Heikin Ashi + Smoothed candlestick patterns with configurable sensitivity (sens 0–100, default 50; higher = earlier signals)
- Renko + Adaptive brick-based charting for significant price movements
Signal Strength Scoring + 0–100 strength per signal
Signal History + Last 5 trend changes per pair/period/method
Exchange-Aggregated Pricing + Data from multiple exchanges

Quick Start

Get default signals + BTC/USD + 1d + all 4 types:

curl -X GET "https://nuxn-crypto-buy-sell-signal2.p.rapidapi.com/api/rapid.php" \
  -H "X-RapidAPI-Host: nuxn-crypto-buy-sell-signal2.p.rapidapi.com" \
  -H "X-RapidAPI-Key: YOUR_API_KEY"

Get BTC/USD daily signals:

curl -X GET "https://nuxn-crypto-buy-sell-signal2.p.rapidapi.com/api/rapid.php?pair=BTC/USD&period=1d" \
  -H "X-RapidAPI-Host: nuxn-crypto-buy-sell-signal2.p.rapidapi.com" \
  -H "X-RapidAPI-Key: YOUR_API_KEY"

Get a currency-to-currency pair (EUR/JPY):

curl -X GET "https://nuxn-crypto-buy-sell-signal2.p.rapidapi.com/api/rapid.php?pair=EUR/JPY&period=1d" \
  -H "X-RapidAPI-Host: nuxn-crypto-buy-sell-signal2.p.rapidapi.com" \
  -H "X-RapidAPI-Key: YOUR_API_KEY"

Get Heikin Ashi with custom sensitivity:

curl -X GET "https://nuxn-crypto-buy-sell-signal2.p.rapidapi.com/api/rapid.php?pair=BTC/USD&period=1d&type=ha&sens=80" \
  -H "X-RapidAPI-Host: nuxn-crypto-buy-sell-signal2.p.rapidapi.com" \
  -H "X-RapidAPI-Key: YOUR_API_KEY"

Get NUXN Supertrend (NST) signals with custom bands:

curl -X GET "https://nuxn-crypto-buy-sell-signal2.p.rapidapi.com/api/rapid.php?type=nst&band_start=0.5&band_end=2.0" \
  -H "X-RapidAPI-Host: nuxn-crypto-buy-sell-signal2.p.rapidapi.com" \
  -H "X-RapidAPI-Key: YOUR_API_KEY"

Get Supertrend signals with custom band:

curl -X GET "https://nuxn-crypto-buy-sell-signal2.p.rapidapi.com/api/rapid.php?type=supertrend&band=1.0" \
  -H "X-RapidAPI-Host: nuxn-crypto-buy-sell-signal2.p.rapidapi.com" \
  -H "X-RapidAPI-Key: YOUR_API_KEY"

Health check:

curl -X GET "https://nuxn-crypto-buy-sell-signal2.p.rapidapi.com/api/rapid.php/ping" \
  -H "X-RapidAPI-Host: nuxn-crypto-buy-sell-signal2.p.rapidapi.com"

Parameters

All parameters are optional. Omit all parameters to get the default (BTC/USD + 1d + all 4 types).

Request parameters
Parameter	Type	Description	Default
`pair`	string	Market pair in BASE/QUOTE format from the nuxn.com universe (609,180 pairs). Examples: BTC/USD, USD/BTC, EUR/JPY, BTC/ETH	BTC/USD
`period`	string	Timeframe: 1s, 1min, 5m, 15m, 30m, 1h, 4h, 1d, 1w	1d
`type`	string	Signal method: ha, renko, supertrend, nst	All 4 types
`sens`	number	Heikin Ashi sensitivity (0–100). Higher = more sensitive = earlier HA signals	50
`band`	number	Supertrend multiplier (0.01–3.0)	2.5
`band_start`	number	NST inner band multiplier (0.01–3.0)	1.0
`band_end`	number	NST outer band multiplier (0.01–3.0)	2.5

Timeframe Rules

Currency-to-currency pairs (e.g. EUR/JPY, USD/CHF) cannot be called with 1s or 1min timeframes. The API returns HTTP 422 unsupported_interval_for_pair with the allowed periods (5m and above). This matches the nuxn.com site, which likewise restricts sub-5-minute intervals for fiat pairs.

HTTP/1.1 422 Unprocessable Entity
{
  "error": "unsupported_interval_for_pair",
  "message": "Currency-to-currency pairs cannot be called with 1s or 1min timeframes. Use 5m or above.",
  "period": "1min",
  "pair": "EUR/JPY",
  "allowed_periods": ["5m", "15m", "30m", "1h", "4h", "1d", "1w"]
}

Warming (first call on a cold pair)

When a pair has never been requested before, the first call may return HTTP 202 Accepted with status: "warming_up" and a Retry-After: 30 header. The pair is being warmed in the background (through the same data pipeline that powers nuxn.com). Respect the header and call again; the next call returns 200 with full signals.


HTTP/1.1 202 Accepted
Retry-After: 30

{
  "ok": true,
  "status": "warming_up",
  "message": "Requested pair(s) are still warming up. Call again in 30 seconds.",
  "warming_up_count": 1,
  "signals": {
    "USD/TRY": {
      "1d": {
        "status": "warming_up",
        "error": "cache_miss",
        "message": "Pair is warming up. Call this endpoint again in a few seconds (Retry-After header)."
      }
    }
  }
}

Response Example

{
  "ok": true,
  "mode": "signals",
  "count": 1,
  "warming_up_count": 0,
  "band": 2.5,
  "band_start": 1.0,
  "band_end": 2.5,
  "sens": 50.0,
  "elapsed": "2341ms",
  "signals": {
    "BTC/USD": {
      "1d": {
        "last_price": 108542.30,
        "candles": 299,
        "ha": {
          "type": "buy",
          "label": "BUY",
          "strength": 85,
          "detail": "Bullish trend · 85% strength",
          "history": [
            {"type": "sell", "start": "2026-01-15", "end": "2026-03-20", "bars": 65},
            {"type": "buy", "start": "2026-03-20", "end": "2026-07-04", "bars": 106}
          ]
        },
        "renko": {"type": "sell", "label": "SELL", "strength": 42, "detail": "Downtrend #5 bricks"},
        "supertrend": {"type": "buy", "label": "BUY", "strength": 72, "detail": "Supertrend uptrend · 1.44xATR"},
        "nst": {"type": "buy", "label": "BUY", "strength": 82, "detail": "Nuxn uptrend · band 1 to 2.5"}
      }
    }
  },
  "pairs_total": 609180,
  "sitemap_pairs_total": 609180,
  "crypto_count": 616,
  "currency_count": 165,
  "periods": ["1s", "1min", "5m", "15m", "30m", "1h", "4h", "1d", "1w"],
  "types": ["ha", "renko", "supertrend", "nst"]
}

Pair Catalog

The complete list of all 609,180 callable pairs (matching the public nuxn.com sitemap) is available as a JSON file:

curl -X GET "https://www.nuxn.com/api/rapid-pairs.json"

Signal Types

Supertrend

ATR-based trend following indicator. Lower band values = tighter bands = more frequent signals (earlier but noisier). Higher values = wider bands = fewer signals (later but more reliable).

Band 0.3 + Very aggressive, many signals, higher noise
Band 2.5 + Default
Band 1.5 + Conservative, fewer signals, higher reliability
Band 3.0 + Ultra-conservative, major trend changes only

NUXN Supertrend (NST)

Dual-band supertrend that computes two ATR-based bands simultaneously:

Inner band (band_start) + Tighter band, more sensitive, flips earlier (default 1.0)
Outer band (band_end) + Wider band, less sensitive, confirms trends (default 2.5)

Heikin Ashi

Smoothed candlestick pattern that filters market noise. Configurable sensitivity via sens (0–100, default 50): higher values require smaller body percentages and lower strength floors, producing earlier signals; lower values demand stronger confirmation.

Renko

Adaptive brick-based charting that focuses only on significant price movements. Brick size adapts to market volatility, filtering out minor fluctuations and noise.

Error Codes

HTTP status codes
Code	Meaning	Recovery
`200`	Success with signal data	Parse the response
`202`	Pair warming up	Respect Retry-After (30s) and call again
`400`	Invalid parameters (pair/period/type/sens)	Check the error and valid values
`403`	Not routed through RapidAPI	Use RapidAPI with your X-RapidAPI-Key
`422`	Currency pair with 1s/1min, or budget exceeded	Use 5m+ for currency pairs; narrow the request
`429`	Rate limited	Back off and retry
`502`	Upstream signal service error	Retry after a short wait
`503`	Service unavailable	Retry later

Use Cases

Trading bots + Automate buy/sell decisions across any of 609,180 pairs
Portfolio dashboards + Monitor real-time signals across your entire portfolio
Alert systems + Get notified when signals change across pairs and timeframes
Backtesting + Analyze historical signal performance
FX and cross-market analysis + Currency pairs (EUR/JPY, GBP/USD) plus crypto crosses (BTC/ETH, SOL/XRP)

Authentication

Authentication is handled automatically by RapidAPI. No additional API keys or OAuth setup required. Just subscribe to a plan and use your RapidAPI key.

Support

For support, questions, or feature requests:
📧 Email: ai@nuxn.com
🌐 Website: www.nuxn.com