Getting Started

⚠️

This API is in active development. Endpoints, request and response shapes, field names, authentication, rate limits, and pricing are all subject to change at any time without notice. Do not depend on this API for production workloads. Pin your integrations against a specific response and be ready to update when something moves. Breaking changes will not always be announced ahead of time.

AltIndex provides alternative data on ~2,958 publicly traded stocks, ETFs, and cryptocurrencies. Track social media followers, mentions, sentiment, hiring trends, web traffic, app downloads, and more, with historical time series going back 7+ years. Access the data through the REST API for programmatic integrations, or connect via MCP to query it directly from AI assistants like Claude, Cursor, and ChatGPT.

Get your API key

AltIndex Pro subscribers ($99/mo) can create an API key in seconds:

Log in to your AltIndex account at app.altindex.com (opens in a new tab)
Go to Settings
Click Create API Key, then copy and store it securely

Your key gives you access to all public API endpoints with 500 requests/day and 90 days of historical data.

Enterprise access: Need higher rate limits, each dataset's full measured history, or bulk delivery? Contact our sales team (opens in a new tab) to discuss Enterprise plans. Per-dataset history start dates are published in Collection & Freshness.

Make your first request

Once you have your API key, try searching for an entity:

curl -H "X-API-Key: YOUR_API_KEY" \
  "https://v2.api.altindex.com/api/entities?search=Apple"

{
  "items": [
    {
      "ticker": "AAPL",
      "name": "Apple Inc.",
      "industry": "Technology",
      "domain": "apple.com"
    }
  ],
  "total": 1,
  "limit": 50,
  "offset": 0
}

Explore the data

AltIndex tracks entities (companies, ETFs, crypto) and maps each one to its social media accounts across 9 platforms, with Stocktwits keyed by cashtag instead of a handle. Those mappings drive the daily follower counts; mention volumes and sentiment scores are collected by keyword and are available whether or not an entity has a handle mapped. Start with the entity endpoints to discover what's available, then pull social metrics for the tickers you care about.

Rate limits and history

Tier	Daily requests	Historical window
Pro ($99/mo)	500	90 days
Enterprise	Custom	Each dataset's full measured history

Rate limits are enforced on a 24-hour rolling window. For Enterprise pricing and custom limits, contact sales (opens in a new tab).

Next steps

REST API Reference: Authentication, scopes, error handling, and endpoint details
MCP: Connect AltIndex to Claude, Cursor, or ChatGPT for AI-powered research
Data Dictionary: Field definitions, platform coverage, and collection methodology

Getting Started