Base URL
Three Sigma API is built on REST principles. We enforce HTTPS in every request to improve data security, integrity, and privacy. The API does not support HTTP. All requests contain the following base URL:Authentication
To authenticate you need to add an Authorization header with the contents of the header beingx-api-key sk_123456789 where sk_123456789 is your API Key
Response Codes
Three Sigma uses standard HTTP codes to indicate the success or failure of your requests. In general,2xx HTTP codes correspond to success, 4xx codes are for user-related failures, and 5xx codes are for infrastructure issues.
| Status | Description |
|---|---|
200 | Successful request. |
400 | Check that the parameters were correct. |
401 | The API key used was missing. |
403 | The API key used was invalid. |
404 | The resource was not found. |
429 | The rate limit was exceeded. |
5xx | Indicates an error with Three Sigma servers. |
Want to Jump In?
If you’re ready to start using the API, check out the Quick Start guide.FAQ
What is the difference between the API and the Playground?
What is the difference between the API and the Playground?
The API is a programmatic way to access the data. The Playground is a visual way to access the data. The Playground is a great way to get started with the API.
How do you handle API versioning?
How do you handle API versioning?
Currently, there’s no versioning system in place. We plan to add versioning via calendar-based headers in the future.