> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ostium.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Legacy Developer Docs

> Legacy SDK and API documentation retained for older integrations.

These pages are preserved for existing integrations built on older Ostium developer surfaces.

For new integrations:

* builders should start in [Builders Overview](/developer/builders/overview)
* traders should start in [Traders Overview](/developer/traders/overview)

Legacy pages:

* [API & SDK (OLD)](/developer/api-and-sdk)
* [Builder Codes (OLD)](/developer/builder-codes)