app-package-archive

PyPI

The Python community's package index, holding every published version of each package along with structured metadata. You can search on the website, and its keyless JSON API lets our search pull package details directly. Useful for software archaeology: retrieving an old release of a library or checking a package's version history.

Software / packages API

Search this archive

Why it’s useful & how it works

PyPI is the authoritative source for Python packages and keeps every version of every package that has ever been published, along with structured metadata for each release. Its keyless JSON API means Echo can pull package details directly, so searching by package name surfaces version lists, release dates, and descriptions without leaving the search interface. It is especially valuable for software archaeology: tracking down an older release of a library, understanding when a dependency changed, or confirming what was available at a specific point in time.

What’s inside

Over 600,000 projects and more than 8 million individual releases as of early 2026, with download volume exceeding 300 billion packages annually.

API access

https://pypi.org/pypi/ <pkg>/json (keyless)

What we measured

Our own probes, not the archive’s own claims. Re-run periodically; every reading below is dated.

Reachability

Direct request: Responded HTTP 200 177 ms
Through a datacenter proxy: Responded HTTP 200 487 ms
API, direct: Responded HTTP 200 89 ms
API, through a proxy: Responded HTTP 200 802 ms

Did a real search return anything?

Returned results · median 491 ms · stable across runs

marker present (count not extracted)

Sample query: requests

Benchmark coverage

Found 2 of 3 test items (67%) in the Software / packages cluster. Median response 180 ms.

By how well known the item is: 2/2 well-known, 0/1 obscure .

One item it found: requests

Reachability measured 2026-08-22. Search checked 2026-08-22. Benchmark run 2026-08-22.