Data & API

Everything StoreTally shows is also available as JSON and CSV, free and without a key. The endpoints below are the same ones the site's own pages use, so any filter you can set on a store page you can also ask for directly.

Terms

• Free to use with attribution, in the spirit of CC BY 4.0: credit “Data: StoreTally” with a link to https://storetally.com wherever you publish or show the data.
• Fair use: keep to about one request per second. Heavy or abusive use may be throttled. If you need more, get in touch.
• No warranty. The figures are store data as StoreTally observed it, with the limits described in the Methodology. Stores change their pages without notice, and a figure can be missing or late.

Conventions

• Plain HTTPS GET requests. No key, no sign-up.
• JSON field names are camelCase. A field with no value is null, not left out.
• Stores are numbered: 0 Chrome, 1 Edge, 2 Firefox, 3 Apple, 4 Google Play.
• Dates in query parameters are yyyy-MM-dd. A value that cannot be read (a malformed date or number) returns 400.
• Listing results cover live listings only unless you ask for delisted ones.

Endpoints

GET /api/extensions

Searches and filters every listing in one or all stores and returns one page of results. Every parameter is optional; with none you get the first 50 live listings across all stores, largest usage figure first.

Response (abridged; the values are illustrative):

{
  "total": 1834,
  "page": 1,
  "pageSize": 50,
  "rows": [
    {
      "id": "abcdefghijklmnopabcdefghijklmnop",
      "s": "example-extension",
      "n": "Example Extension",
      "d": "Example Developer",
      "c": "Productivity",
      "t": 1,
      "p": 0,
      "i": 200000,
      "wd": null,
      "cd": null,
      "r": 4.6,
      "rc": 1520,
      "v": "3.2.1",
      "u": "2026-08-14",
      "fs": "2026-09-01T03:12:44",
      "du": null,
      "al": 3,
      "ic": "https://...",
      "f": false,
      "ds": "The first 200 characters of the description...",
      "sp": [[89.6, 190000], [41.2, 195000], [0, 200000]],
      "g1": null, "g1p": null, "g1b": null,
      "g7": 10000, "g7p": 5.26, "g7b": "2026-09-16T04:02:10",
      "g30": null, "g30p": null, "g30b": null,
      "g365": null, "g365p": null, "g365b": null,
      "rg1": 3, "rg1p": 0.2, "rg1b": "2026-09-23T04:10:51",
      "rg7": 21, "rg7p": 1.4, "rg7b": "2026-09-16T04:02:10",
      "lc": "2026-09-24T04:05:33"
    }
  ]
}

How growth is measured and scaled: Methodology.

GET /api/extensions.csv

The same filters and sort as /api/extensions, as a spreadsheet: the first 1,000 matching rows, UTF-8 with a byte-order mark so Excel reads names correctly. page and pageSize do not apply. Columns:

platform, id, name, developer, category, type, usage, weekly_downloads,
rating, rating_count, version, updated, store_created, first_seen, delisted,
featured, access_level, growth_1d, growth_1d_pct, growth_7d, growth_7d_pct,
ratings_growth_1d, ratings_growth_1d_pct, ratings_growth_7d,
ratings_growth_7d_pct, url

platform is the store's name (chrome, edge, …), usage is the usage figure (the rating count on Apple), featured is yes or no, and url is the listing's StoreTally page.

GET /api/summary

Census totals - how many listings are known, live and delisted, per store and overall - and breakdowns of the live ones. Response (illustrative values):

{
  "known": 2710000, "crawled": 2650000, "delisted": 41000, "live": 2609000,
  "rated": 1200000, "noVersionKey": 5200, "snapshots": 18400000, "pending": 900,
  "platforms": [ { "platform": 0, "known": 250000, "crawled": 248000, "live": 240000, "delisted": 8000 } ],
  "buckets": [ { "label": "1M+", "n": 1400 } ],
  "cats": [ { "label": "Productivity", "n": 52000, "unrated": 30000 } ],
  "years": [ { "label": 2026, "n": 610000 } ]
}

• known every listing ever found; crawled read at least once; live crawled and still in its store; delisted gone from its store; rated live with a rating; noVersionKey live with a version that cannot be compared; snapshots history records kept; pending listings queued to be read.
• buckets live listings by usage figure: under 100, 100-1K, 1K-10K, 10K-100K, 100K-1M, 1M+ and not shown.
• cats the 10 biggest categories; years live listings by year of last update, the 9 most recent years.

GET /api/categories

Category names, sorted, for one store (?platform=2) or all of them. Use these as the category filter.

["Alerts & Updates", "Appearance", "Bookmarks", "Download Management", ...]

GET /api/permissions

Every permission requested by live Chrome and Edge listings (the stores whose manifests StoreTally reads), with how many request it, most common first. Use the names as the permission filter.

[ { "permission": "storage", "count": 180000 }, { "permission": "tabs", "count": 95000 }, ... ]

The summary, category and permission lists are computed on a schedule rather than on each request, so they can trail the listings by up to about a day.

Examples

• /api/extensions?platform=0&pageSize=5
• /api/extensions?platform=2&q=password&minRating=4.5&minRatingCount=100&sort=ratingcount
• /api/extensions?platform=0&permission=cookies&hostAccess=all&minInstalls=100000
• /api/extensions?platform=1&sort=growth7d&pageSize=20
• /api/extensions?platform=0&delistedAfter=2026-09-01&sort=installs
• /api/extensions.csv?platform=0&updatedBefore=2023-01-01&minInstalls=10000
• /api/summary
• /api/categories?platform=2
• /api/permissions