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class="links__SidebarLink-sc-19vgq0o-3 iPgskl active-sidebar-link" href="../../using-npm/registry">registry<span class="DocLinks__LinkDesc-sc-1vrw6od-0 bNiGAM">The JavaScript Package Registry</span></a></div><div class="css-l3rx45"><a class="links__SidebarLink-sc-19vgq0o-3 iPgskl" href="../../using-npm/removal">removal<span class="DocLinks__LinkDesc-sc-1vrw6od-0 bNiGAM">Cleaning the Slate</span></a></div><div class="css-l3rx45"><a class="links__SidebarLink-sc-19vgq0o-3 iPgskl" href="../../using-npm/scope">scope<span class="DocLinks__LinkDesc-sc-1vrw6od-0 bNiGAM">Scoped packages</span></a></div><div class="css-l3rx45"><a class="links__SidebarLink-sc-19vgq0o-3 iPgskl" href="../../using-npm/scripts">scripts<span class="DocLinks__LinkDesc-sc-1vrw6od-0 bNiGAM">How npm handles the &quot;scripts&quot; field</span></a></div></div></div></nav><style data-emotion-css="16vu25q">.css-16vu25q{box-sizing:border-box;margin:0;min-width:0;width:100%;}</style><div class="css-16vu25q"><div class="Page__Content-sc-4b62ym-0 gJQTGP documentation"><div><h1 id="registry7" style="position:relative;"><a href="#registry7" aria-label="registry7 permalink" class="header-link-class before"><svg aria-hidden="true" height="20" version="1.1" viewBox="0 0 16 16" width="20"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>registry</h1>
<h2 id="the-javascript-package-registry" style="position:relative;"><a href="#the-javascript-package-registry" aria-label="the javascript package registry permalink" class="header-link-class before"><svg aria-hidden="true" height="20" version="1.1" viewBox="0 0 16 16" width="20"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>The JavaScript Package Registry</h2>
<h3 id="description" style="position:relative;"><a href="#description" aria-label="description permalink" class="header-link-class before"><svg aria-hidden="true" height="20" version="1.1" viewBox="0 0 16 16" width="20"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Description</h3>
<p>To resolve packages by name and version, npm talks to a registry website
that implements the CommonJS Package Registry specification for reading
package info.</p>
<p>npm is configured to use npm, Inc.'s public registry at
<a href="https://registry.npmjs.org">https://registry.npmjs.org</a> by default. Use of the npm public registry is
subject to terms of use available at <a href="https://www.npmjs.com/policies/terms">https://www.npmjs.com/policies/terms</a>.</p>
<p>You can configure npm to use any compatible registry you like, and even run
your own registry. Use of someone else's registry may be governed by their
terms of use.</p>
<p>npm's package registry implementation supports several
write APIs as well, to allow for publishing packages and managing user
account information.</p>
<p>The npm public registry is powered by a CouchDB database,
of which there is a public mirror at
<a href="https://skimdb.npmjs.com/registry">https://skimdb.npmjs.com/registry</a>.  The code for the couchapp is
available at <a href="https://github.com/npm/npm-registry-couchapp">https://github.com/npm/npm-registry-couchapp</a>.</p>
<p>The registry URL used is determined by the scope of the package (see
<a href="../../using-npm/scope"><code class="language-text">scope</code></a>. If no scope is specified, the default registry is used, which is
supplied by the <code class="language-text">registry</code> config parameter.  See <a href="../../cli-commands/npm-config"><code class="language-text">npm config</code></a>,
<a href="../../configuring-npm/npmrc"><code class="language-text">npmrc</code></a>, and <a href="../../using-npm/config"><code class="language-text">config</code></a> for more on managing npm's configuration.</p>
<h3 id="does-npm-send-any-information-about-me-back-to-the-registry" style="position:relative;"><a href="#does-npm-send-any-information-about-me-back-to-the-registry" aria-label="does npm send any information about me back to the registry permalink" class="header-link-class before"><svg aria-hidden="true" height="20" version="1.1" viewBox="0 0 16 16" width="20"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Does npm send any information about me back to the registry?</h3>
<p>Yes.</p>
<p>When making requests of the registry npm adds two headers with information
about your environment:</p>
<ul>
<li><code class="language-text">Npm-Scope</code> – If your project is scoped, this header will contain its
scope. In the future npm hopes to build registry features that use this
information to allow you to customize your experience for your
organization.</li>
<li><code class="language-text">Npm-In-CI</code> – Set to "true" if npm believes this install is running in a
continuous integration environment, "false" otherwise. This is detected by
looking for the following environment variables: <code class="language-text">CI</code>, <code class="language-text">TDDIUM</code>,
<code class="language-text">JENKINS_URL</code>, <code class="language-text">bamboo.buildKey</code>. If you'd like to learn more you may find
the <a href="https://github.com/npm/npm-registry-client/pull/129">original PR</a>
interesting.
This is used to gather better metrics on how npm is used by humans, versus
build farms.</li>
</ul>
<p>The npm registry does not try to correlate the information in these headers
with any authenticated accounts that may be used in the same requests.</p>
<h3 id="can-i-run-my-own-private-registry" style="position:relative;"><a href="#can-i-run-my-own-private-registry" aria-label="can i run my own private registry permalink" class="header-link-class before"><svg aria-hidden="true" height="20" version="1.1" viewBox="0 0 16 16" width="20"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Can I run my own private registry?</h3>
<p>Yes!</p>
<p>The easiest way is to replicate the couch database, and use the same (or
similar) design doc to implement the APIs.</p>
<p>If you set up continuous replication from the official CouchDB, and then
set your internal CouchDB as the registry config, then you'll be able
to read any published packages, in addition to your private ones, and by
default will only publish internally. </p>
<p>If you then want to publish a package for the whole world to see, you can
simply override the <code class="language-text">--registry</code> option for that <code class="language-text">publish</code> command.</p>
<h3 id="i-dont-want-my-package-published-in-the-official-registry-its-private" style="position:relative;"><a href="#i-dont-want-my-package-published-in-the-official-registry-its-private" aria-label="i dont want my package published in the official registry its private permalink" class="header-link-class before"><svg aria-hidden="true" height="20" version="1.1" viewBox="0 0 16 16" width="20"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>I don't want my package published in the official registry. It's private.</h3>
<p>Set <code class="language-text">&quot;private&quot;: true</code> in your package.json to prevent it from being
published at all, or
<code class="language-text">&quot;publishConfig&quot;:{&quot;registry&quot;:&quot;http://my-internal-registry.local&quot;}</code>
to force it to be published only to your internal registry.</p>
<p>See <a href="../../configuring-npm/package-json"><code class="language-text">package.json</code></a> for more info on what goes in the package.json file.</p>
<h3 id="will-you-replicate-from-my-registry-into-the-public-one" style="position:relative;"><a href="#will-you-replicate-from-my-registry-into-the-public-one" aria-label="will you replicate from my registry into the public one permalink" class="header-link-class before"><svg aria-hidden="true" height="20" version="1.1" viewBox="0 0 16 16" width="20"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Will you replicate from my registry into the public one?</h3>
<p>No.  If you want things to be public, then publish them into the public
registry using npm.  What little security there is would be for nought
otherwise.</p>
<h3 id="do-i-have-to-use-couchdb-to-build-a-registry-that-npm-can-talk-to" style="position:relative;"><a href="#do-i-have-to-use-couchdb-to-build-a-registry-that-npm-can-talk-to" aria-label="do i have to use couchdb to build a registry that npm can talk to permalink" class="header-link-class before"><svg aria-hidden="true" height="20" version="1.1" viewBox="0 0 16 16" width="20"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Do I have to use couchdb to build a registry that npm can talk to?</h3>
<p>No, but it's way easier.  Basically, yes, you do, or you have to
effectively implement the entire CouchDB API anyway.</p>
<h3 id="is-there-a-website-or-something-to-see-package-docs-and-such" style="position:relative;"><a href="#is-there-a-website-or-something-to-see-package-docs-and-such" aria-label="is there a website or something to see package docs and such permalink" class="header-link-class before"><svg aria-hidden="true" height="20" version="1.1" viewBox="0 0 16 16" width="20"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Is there a website or something to see package docs and such?</h3>
<p>Yes, head over to <a href="https://www.npmjs.com/">https://www.npmjs.com/</a></p>
<h3 id="see-also" style="position:relative;"><a href="#see-also" aria-label="see also permalink" class="header-link-class before"><svg aria-hidden="true" height="20" version="1.1" viewBox="0 0 16 16" width="20"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>See also</h3>
<ul>
<li><a href="../../cli-commands/npm-config">npm config</a></li>
<li><a href="../../using-npm/config">config</a></li>
<li><a href="../../configuring-npm/npmrc">npmrc</a></li>
<li><a href="../../using-npm/developers">npm developers</a></li>
<li><a href="../../using-npm/disputes">npm disputes</a></li>
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