How to fix npm ERR! code ESCOPEMISSING npm ERR! Missing scope for scoped package in npm

First, confirm that the package name in your package.json uses the correct scoped package format. Scoped packages must include the @ symbol followed by the scope name and a forward slash.

{
  "dependencies": {
    "@myorg/mypackage": "^1.0.0"
  }
}

If the @ symbol is missing, npm will try to install from GitHub instead of npm registry. The correct syntax is @scope/package-name with no spaces.

Create or update your .npmrc file in the project root directory to associate the scope with the correct registry. For public npm registry scoped packages, no special configuration is typically needed, but for private registries, you must map the scope.

# For a private registry
@myorg:registry=https://your-private-registry.com/
//your-private-registry.com/:_authToken=YOUR_AUTH_TOKEN

# For multiple scopes
@org1:registry=https://registry1.com/
@org2:registry=https://registry2.com/

# Keep public packages using default registry
registry=https://registry.npmjs.org/

Replace @myorg with your actual scope name (including the @ symbol) and provide the correct registry URL and authentication token.

Instead of manually editing .npmrc, you can use the npm login command to securely configure scope-to-registry associations and authenticate in one step.

# For a private registry
npm login --scope @myorg --registry https://your-private-registry.com/

# Follow the prompts to enter username, password, and email
# This creates proper authentication tokens in .npmrc

This method is preferred because it securely stores authentication tokens and ensures proper formatting in your .npmrc file.

You can also use npm config commands to set scope-to-registry associations globally or per-project.

# Set scope registry globally (affects all projects)
npm config set @myorg:registry https://your-private-registry.com/

# Set scope registry for current project only
npm config set @myorg:registry https://your-private-registry.com/ --location=project

# Verify the configuration
npm config list

The --location=project flag limits the configuration to the current project's .npmrc file, keeping your global settings clean.

After configuring your scopes, clear npm's cache to remove any stale scope information, then delete and reinstall your dependencies.

# Clear npm cache
npm cache clean --force

# Remove existing installations
rm -rf node_modules package-lock.json

# Reinstall all dependencies
npm install

This ensures npm reads your new scope configuration and fetches packages from the correct registries without relying on cached data.