AltIndex API
AltIndex provides an HTTP REST API for alternative data on public companies. It's designed for analysts, investors, and product teams who want structured access to signals such as social attention, hiring activity, web traffic, app performance, and our proprietary AltIndex AI Score without maintaining their own data collection pipelines.
Use the API to answer questions like:
- Which tickers are gaining (or losing) attention on Reddit in real time?
- Which companies are expanding headcount or increasing job postings?
- How is a company's web traffic trending over time?
- Which stocks look strongest across our alternative data signals (via AltIndex AI Score)?
Note: api.altindex.com is dedicated to runtime endpoints and the OpenAPI spec. Human traffic is redirected here on the API host configuration.
Base URL
https://api.altindex.com
Authentication
Use the apiKey (or apikey) query parameter. Query parameters are case-insensitive.
Note: X-API-Key header authentication is not currently supported by the production PHP endpoints.
Quick Start
curl "https://api.altindex.com/graph?apiKey=YOUR_API_KEY&symbol=TSLA"API Reference and Spec
Looking for the upcoming API v2 preview? Visit API v2.
If you have questions, need higher limits, or want help integrating the API into your workflow, contact us (opens in a new tab).