# signals.ellva.ai RSI Momentum Indicator

> signals.ellva.ai RSI Momentum Indicator is a paid API for AI agents from signals.ellva.ai, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-11).

Returns the current RSI value, oversold/neutral/overbought signal, and last daily close for a US-listed equity or ETF ticker

## Facts

- Endpoint: GET https://signals.ellva.ai/v1/rsi?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signals-ellva-ai-fb37082f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_G4qiNk0AMFOs3lKc8E-rH

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 signals-ellva-ai-fb37082f
```

Example prompt: What's the current RSI for NVDA using the standard 14-day lookback — is it overbought, oversold, or neutral?

## When to prefer this

Use this endpoint when you need a quick, pre-computed RSI momentum signal for a single US equity or ETF without needing to manage raw price data or write calculation logic. Ideal for AI trading agents, swing trading bots, or dashboards that need real-time overbought/oversold signals with configurable lookback periods.

## Known failure modes

- Invalid or unrecognized ticker symbol — returns error or empty result
- Period out of range (below 2 or above 100) — returns validation error
- Market data unavailable for the ticker from Alpaca — returns error
- Payment failure or insufficient USDC balance for the $0.02 per-call fee — request blocked
- Rate limiting or upstream data outage from Alpaca Markets

## How this service works

Daily Relative Strength Index (RSI) momentum indicator for US-listed equities and ETFs. Returns the current RSI value (0-100), an oversold/neutral/overbought trading signal, and the last daily close. Useful for technical analysis, momentum signals, mean-reversion strategies, market timing, swing trading, and AI-driven trading agents. Configurable lookback period (2-100 trading days, default 14). Daily close data from Alpaca Markets.

## Output

Returns a JSON object with the ticker symbol, RSI value (0-100), a trading signal (oversold/neutral/overbought), last daily close price, the lookback period used, number of closes used in the calculation, and a UTC timestamp of when the data was fetched.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {
   "period": 14,
   "ticker": "SPY"
  }
 }
}
```

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "ticker"
     ],
     "properties": {
      "period": {
       "type": "integer",
       "default": 14,
       "maximum": 100,
       "minimum": 2,
       "description": "RSI lookback period in trading days. Standard is 14 (default). Use 2-5 for short-term mean-reversion (Connors-style) signals. Range 2-100."
      },
      "ticker": {
       "type": "string",
       "description": "US-listed equity or ETF ticker symbol (e.g. SPY, QQQ, AAPL, NVDA, MSFT, TSLA, ARKK). Case-insensitive; alphanumeric, up to 10 characters."
      }
     }
    }
   },
   "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/signals-ellva-ai-fb37082f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from signals.ellva.ai](https://www.zero.xyz/host/signals.ellva.ai/llms.txt)