API Introduction

Welcome to the CIS Fundamentals API documentation.

Here you’ll find an overview of available data structures, request and response formats, authentication methods, and usage guidelines for integrating our API into your systems.

Use the navigation panel on the left to explore individual sections and endpoints — including financial data, dividends, insider activity, corporate events, and more.

This section serves as a starting point for working with the API.

Base URL

https://cisfundamentals.com/api/

All endpoints are relative to this base URL.

Authentication

All requests require an API token.
The token must be passed as a query parameter named token.

Example:

GET /v2/stocks?limit=10&token=<YOUR_API_TOKEN>

ℹ️ Token Info

Each API token has a rate limit based on your subscription plan.
To check your current usage and remaining quota, use the following endpoint:

GET /v2/token_info?token=YOUR_API_TOKEN

Response example:

{
  "day_limit": 8235,
  "valid_to": "2028-12-31"
}

This method helps you monitor usage and ensure your token remains active.

Trial Access

We provide demo access within 1 business day — just contact us at api@cisfundamentals.com with a brief description of your use case.

Want to integrate CIS market data into your product, research, or internal systems? We're happy to help — just reach out.