generated: '2026-08-13'
method: derived
source: https://docs.millimetric.ai/sdks/browser.md, https://docs.millimetric.ai/sdks/node.md, registry.npmjs.org probes 2026-08-13
description: >-
  First-party client libraries documented by Millimetric. Both npm packages are named in the
  docs, the marketing site and the architecture page (packages/sdk-browser, packages/sdk-node),
  with npm install instructions — but neither name resolves on the public npm registry. Re-probed
  2026-08-13: registry.npmjs.org/@millimetric/track and .../@millimetric/track-node both return
  HTTP 404, and the npm search API returns 0 results for "millimetric". They are documented but
  unpublished (or published privately). The browser build IS live and served directly by the API
  Worker at GET https://api.millimetric.ai/v1/a.js (HTTP 200, application/javascript, 4,193 bytes)
  — an unpinned CDN-style distribution with no version in the URL or the bundle.
currency_checked: '2026-08-13'
packages:
  - language: javascript
    registry: npm
    name: "@millimetric/track"
    url: https://www.npmjs.com/package/@millimetric/track
    install: npm i @millimetric/track
    official: true
    version: null
    published: null
    registry_status: 404
    registry_checked: '2026-08-13'
    note: >-
      Not present on the public npm registry (404 on registry.npmjs.org and on the jsDelivr and
      unpkg metadata APIs, all probed 2026-08-13). No version or publish date exists to record;
      null here means "checked, nothing published", not "not checked". A consumer following the
      documented `npm i @millimetric/track` cannot install it today.
    description: Browser SDK (~1.8 KB gzipped). Anonymous ID in localStorage, batched flushes, sendBeacon on pagehide, SPA history patching, DNT/GPC bail-out.
    also_served_as: https://api.millimetric.ai/v1/a.js
  - language: javascript
    registry: npm
    name: "@millimetric/track-node"
    url: https://www.npmjs.com/package/@millimetric/track-node
    install: npm i @millimetric/track-node
    official: true
    version: null
    published: null
    registry_status: 404
    registry_checked: '2026-08-13'
    note: >-
      Not present on the public npm registry (404 probed 2026-08-13). Documented for Node 18+ /
      Bun / Deno with zero dependencies, but unresolvable from npm.
    description: Server-side SDK for Node 18+ / Bun / Deno. Zero dependencies. Batching, 5xx retries with exponential backoff.
  - language: javascript
    registry: cdn
    name: millimetric browser loader (a.js)
    url: https://api.millimetric.ai/v1/a.js
    install: '<script async src="https://api.millimetric.ai/v1/a.js" data-key="pk_live_..."></script>'
    official: true
    version: null
    published: null
    registry_status: 200
    registry_checked: '2026-08-13'
    size_bytes: 4193
    note: >-
      Served by the API Worker itself, not a package registry, so there is no metadata endpoint to
      query. The URL carries no version segment and the bundle embeds no version string, so the
      distribution is UNPINNED — it floats to whatever the Worker is currently serving and a
      consumer cannot tell which build they loaded. Recorded as version null for that reason.