Research access request for search API

I am a researcher analyzing digit distribution in Pi. I need to locate a specific 12‑digit sequence within the 100‑trillion‑digit dataset.

Currently, the public API (/v1/pi) works for fetching digits by position, but the search endpoint (/v1/pi/search) returns 404. Scanning all digits sequentially via the API is impractical.

Could you please advise:

Is the search API available for non‑commercial research use (e.g., with rate limits or an API key)?
Is there a pre‑built index of 12‑digit substrings that I could use?
Or, if you could share any guidance on how to efficiently search the 100‑trillion‑digit dataset.
Thank you for your time and for this valuable resource.