# SentimentAlpha Reputation Alpha — X/Twitter Sentiment for Trading

> SentimentAlpha Reputation Alpha — X/Twitter Sentiment for Trading is a paid API for AI agents from sentimentalpha.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Returns real-time X/Twitter sentiment analysis for a queried entity (stock, person, brand, token) using Grok API to surface trading-relevant social signals

## Facts

- Endpoint: POST https://sentimentalpha.ai/v1/reputation-alpha
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sentimentalpha-reputation-alpha-x-twitter-sentiment-for-trading-48022393
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__mHjc9rhnUtta1oLLkimQ

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 sentimentalpha-reputation-alpha-x-twitter-sentiment-for-trading-48022393 -d '<json body>'
```

Example prompt: What's the current X sentiment and social narrative velocity for NVDA right now — is it bullish, bearish, or showing any contrarian signals I should know about before trading?

## When to prefer this

Choose this endpoint when you need real-time social sentiment from X/Twitter specifically for trading or investment decisions, especially when you want early detection of narrative shifts before mainstream financial data providers pick them up. Prefer over general-purpose sentiment APIs when the entity is a stock ticker, crypto token, or public figure with trading relevance, and when x402 micropayment infrastructure is already in use.

## Known failure modes

- Unknown or too-obscure entity yields low-confidence or empty sentiment data
- Grok API downtime causes service unavailability
- Ambiguous query string without entity_type leads to misclassified or mixed results
- Rate limits or payment failures (x402) block repeated rapid calls
- Very recent or breaking events may not yet have sufficient X volume for reliable signals

## How this service works

SentimentAlpha.ai delivers real-time X/Twitter sentiment intelligence via Grok API. Automate Social Arbitrage: spot cultural trend shifts, narrative velocity, and contrarian signals BEFORE Wall Street. The affordable alternative to TickerTrends, QuiverQuant, and RavenPack for AI agents. x402 micropayments on Base USDC.

## Output

Returns sentiment intelligence about the queried entity derived from real-time X/Twitter data via Grok API, likely including a sentiment score or direction (bullish/bearish/neutral), narrative velocity indicators, trend shift signals, and potentially contrarian or social arbitrage flags relevant to trading decisions.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "query": {
   "type": "string"
  },
  "entity_type": {
   "enum": [
    "wallet",
    "kol",
    "agent",
    "service",
    "project",
    "auto"
   ],
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sentimentalpha-reputation-alpha-x-twitter-sentiment-for-trading-48022393/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from sentimentalpha.ai](https://www.zero.xyz/host/sentimentalpha.ai/llms.txt)