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Version: 5.x

Configuration File

This file is the cornerstone of Verdaccio where you can modify the default behaviour, enable plugins and extend features.

A default configuration file config.yaml is created the very first time you run verdaccio.

Default Configuration

The default configuration has support for scoped packages and allows any user to access all packages, but only authenticated users to publish.

storage: ./storage
file: ./htpasswd
access: $all
publish: $authenticated
proxy: npmjs
proxy: npmjs
log: { type: stdout, format: pretty, level: http }


The following sections explain what each property means and their different options.


Is the location of the default storage. Verdaccio is by default based on local file system.

storage: ./storage

Released at v5.6.0: The environment variable VERDACCIO_STORAGE_PATH could be used to replace the location of the storage (only for the default storage, does not apply to plugins unless it is implemented independently).

The .verdaccio-db database

The tiny database is used to store private packages published by the user. The database is based on a JSON file that contains the list of private packages published and the secret token used for the token signature. It is created automatically when starting the application for the first time.

The location of the database is based on the config.yaml folder location, for instance:

If the config.yaml is located in /some_local_path/config.yaml, the database will be created in /some_local_path/storage/.verdaccio-db.


For users who have been using Verdaccio for an extended period and the .verdaccio-db file already exist the secret may be 64 characters long. However, for newer installations, the length will be generated as 32 characters long.

If the secret length is 64 characters long:

  • For users running Verdaccio 5.x on Node.js 22 or higher, the application will fail to start if the secret length is not 32 characters long.
  • For users running Verdaccio 5.x on Node.js 21 or lower, the application will start, but it will display a deprecation warning at the console.

How to upgrade the token secret at the storage?

⚠️ If the secret is updated will invalidate all previous generated tokens.

Option 1: Manually

Go to the storage location and edit manually the secret to be 32 characters long.

Option 2: Automatically (since v5.31.0)

The migrateToSecureLegacySignature property is used to generate a new secret token if the length is 64 characters.

migrateToSecureLegacySignature: true

The token will be automatically updated to 32 characters long and the application will start without any issues. The property won't have any other effect on the application and could be removed after the secret is updated.

The .verdaccio-db file database is only available if user does not use a custom storage, by default verdaccio uses a tiny database to store private packages the storage property is defined in the config.yaml file. The location might change based on your operating system. Read the CLI section for more details about the location of files.

The structure of the database is based in JSON file, for instance:

"list": ["package1", "@scope/pkg2"],
"secret": "secret_token_32_characters_long"
  • list: Is an array with the list of the private packages published, any item on this list is considered being published by the user.
  • secret: The secret field is used for the token signature and verification, either for JWT or legacy token signature.


Is the location of the plugin directory. Useful for Docker/Kubernetes-based deployments.

plugins: ./plugins


The authentication setup is done here. The default auth is based on htpasswd and is built in. You can modify this behaviour via plugins. For more information about this section read the auth page.

file: ./htpasswd
max_users: 1000


The security block permits customization of the token signature with two options. The configuration is divided into two sections, api and web. When using JWT on api, it must be defined; otherwise, the legacy token signature (aes192) will be utilized.

How to the token is generated?

The token signature requires a secret token generated by custom plugin that creates the .verdaccio-db database or in case a custom storage is used, the secret token is fetched from the plugin implementation itself. In any case the secret token is required to start the application.

Legacy Token Signature

The legacy property is used to enable the legacy token signature. By default is enabled. The legacy feature only applies to the API, the web UI uses JWT by default.


In 5.x versions using Node.js 21 or lower, there will see the warning [DEP0106] DeprecationWarning: crypto.createDecipher is deprecated. printed in your terminal. This warning indicates that Node.js has deprecated a function utilized by the legacy signature.

If verdaccio runs on Node.js 22 or higher, you will not see this warning since a new modern legacy signature has been implemented.

The migrateToSecureLegacySignature property is only available for versions higher than 5.31.0 and is false by default.

legacy: true # by default is true even if this section is not defined
migrateToSecureLegacySignature: true # will generate a new secret token if the length is 64 characters

JWT Token Signature

To enable a new JWT (JSON Web Tokens) signature, the jwt block needs to be added to the api section; jwt is utilized by default in web.

By using the JWT signature is also possible to customize the signature and the token verification with your own properties.

legacy: true
migrateToSecureLegacySignature: true # will generate a new secret token if the length is 64 characters
expiresIn: 29d
someProp: [value]
expiresIn: 1h # 1 hour by default
someProp: [value]


A set of properties to modify the behavior of the server application, specifically the API (Express.js).

You can specify HTTP/1.1 server keep alive timeout in seconds for incoming connections. A value of 0 makes the http server behave similarly to Node.js versions prior to 8.0.0, which did not have a keep-alive timeout. WORKAROUND: Through given configuration you can workaround following issue Set to 0 in case 60 is not enough.

keepAliveTimeout: 60

Web UI

This property allow you to modify the look and feel of the web UI. For more information about this section read the web UI page.

enable: true
title: Verdaccio
logo: logo.png

Uplinks add the ability to fetch packages from remote registries when those packages are not available locally. For more information about this section read the uplinks page.



This section allows you to control how packages are accessed. For more information about this section read the packages page.

access: $all
publish: $authenticated
proxy: npmjs

Advanced Settings

Offline Publish

By default verdaccio does not allow you to publish packages when the client is offline. This can be can be overridden by setting this value to true.

allow_offline: false
Since: `verdaccio@2.3.6` due [#223](

URL Prefix

The prefix is intended to be used when the server runs behinds the proxy and won't work properly if is used without a reverse proxy, check the reverse proxy setup page for more details.

The internal logic builds correctly the public url, validates the host header and and bad shaped url_prefix.

eg: url_prefix: /verdaccio, url_prefix: verdaccio/, url_prefix: verdaccio would be /verdaccio/

url_prefix: /verdaccio/

The new VERDACCIO_PUBLIC_URL is intended to be used behind proxies, this variable will be used for:

  • Used as base path to serve UI resources as (js, favicon, etc)
  • Used on return metadata dist base path
  • Ignores host and X-Forwarded-Proto headers
  • If url_prefix is defined would be appended to the env variable.

Read more about VERDACCIO_PUBLIC_URL at the environment variables page.

User Agent

Since: `verdaccio@5.4.0`

The user agent is disabled by default, in exchange the user agent client (package manager, browser, etc ...) is being bypassed to the remote. To enable the previous behaviour use boolean values.

user_agent: true
user_agent: false
user_agent: 'custom user agent'

User Rate Limit

Since: [verdaccio@5.4.0](

Add default rate limit to user endpoints, npm token, npm profile, npm login/adduser and login website to 100 request peer 15 min, customizable via:

windowMs: 50000
max: 1000

Additonal configuration (only feature flags) is also possible via the middleware docs.

Max Body Size

By default the maximum body size for a JSON document is 10mb, if you run into errors that state "request entity too large" you may increase this value.

max_body_size: 10mb

Listen Port

verdaccio runs by default on the port 4873. Changing the port can be done via CLI or in the configuration file. The following options are valid:

# - localhost:4873 # default value
# - http://localhost:4873 # same thing
# - # listen on all addresses (INADDR_ANY)
# - # if you want to use https
# - "[::1]:4873" # ipv6
# - unix:/tmp/verdaccio.sock # unix socket


To enable https in verdaccio it's enough to set the listen flag with the protocol https://. For more information about this section read the SSL page.

key: ./path/verdaccio-key.pem
cert: ./path/verdaccio-cert.pem
ca: ./path/verdaccio-csr.pem


Proxies are special-purpose HTTP servers designed to transfer data from remote servers to local clients.

http_proxy and https_proxy

If you have a proxy in your network you can set a X-Forwarded-For header using the following properties:

http_proxy: http://something.local/
https_proxy: https://something.local/


This variable should contain a comma-separated list of domain extensions that the proxy should not be used for.

no_proxy: localhost,


Enabling notifications to third-party tools is fairly easy via webhooks. For more information about this section read the notifications page.

method: POST
headers: [{ 'Content-Type': 'application/json' }]
content: '{"color":"green","message":"New package published: * {{ name }}*","notify":true,"message_format":"text"}'

For more detailed configuration settings, please check the source code.



Since v5.22.0 the logger property is renamed to logs but log still compatible but displaying a warning

Two logger types are supported, you may chose only one of them:

console output (the default)

log: { type: stdout, format: pretty, level: http }

file output

log: { type: file, path: verdaccio.log, level: info }

For full information - see here: Features/logger


Since: `verdaccio@3.0.0`

npm audit is a new command released with npm 6.x. Verdaccio includes a built-in middleware plugin to handle this command.

If you have a new installation it comes by default, otherwise you need to add the following props to your config file

enabled: true


This release includes a new property named experiments that can be placed in the config.yaml and is completely optional.

We want to be able to ship new things without affecting production environments. This flag allows us to add new features and get feedback from the community who decides to use them.

The features under this flag might not be stable or might be removed in future releases.

Here is one example:

changePassword: false

To disable the experiments warning in the console, you must comment out the whole experiments section.

Config Builder API

After version v5.23.1 the new advanced configuration builder API is available. The API is a flexible way to generate programmatically configuration outputs either in JSON or YAML using the builder pattern, for example:

import { ConfigBuilder } from 'verdaccio';

const config =;
.addUplink('upstream', { url: 'https://registry.upstream.local' })
.addUplink('upstream2', { url: 'https://registry.upstream2.local' })
.addPackageAccess('upstream/*', {
access: 'public',
publish: 'foo, bar',
unpublish: 'foo, bar',
proxy: 'some',
.addLogger({ level: 'info', type: 'stdout', format: 'json' })
.addSecurity({ api: { legacy: true } });

// generate JSON object as output

// generate output as yaml