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Registry lookups, without the wait. OSMA is a lightning-fast, static search archive for querying open-source packages across NPM and PyPI, bypassing live registry bottlenecks.

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Why it exists

Looking up package details on the official registries usually means dealing with:
  1. Fastly security checks — CAPTCHAs or verification screens just to view a text page
  2. The multi-click tax — clicking through 2-3 pages just to find a version tag or repo link
The fix: complete static snapshots of both registries were taken — NPM at 2026-04-29 09:42 IST, PyPI at 2026-04-29 08:45 IST — and indexed into a custom backend. This lets you instantly search and verify packages without ever hitting a live registry rate limit. Clicking a package in the UI still fetches its extended live details securely via a side-panel.

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Live explorers & docs

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How the backend works

The backend runs on FastAPI, serving static .csv snapshots pulled securely from HuggingFace datasets.
  • SQLite indexing — on first boot, the server downloads the multi-gigabyte dataset and builds an optimized, indexed SQLite database (WAL mode)
  • Speed — because the dataset is localized, /search and /browse respond in milliseconds
  • Rate limiting — strict limits (10 requests/minute, 100/hour) protect the free-tier infrastructure, enforced via slowapi; developers can request an X-Bypass-Token via a GitHub issue
  • Ranking logic — search results are ranked 0 exact match → 1 starts with query → 2 contains query
  • Limitation — as a frozen archive, packages published or deleted after April 2026 aren’t indexed

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Get started

Copyright © 2025–2026 Amit Dutta