How to fix npm ERR! 405 Method Not Allowed in npm

npmINTERMEDIATEMEDIUMUpdated Dec 6, 2025· 100 views

The HTTP 405 Method Not Allowed error in npm occurs when the registry or proxy rejects the HTTP method used by npm. This typically indicates a misconfigured proxy, registry, or permission issue.

Quick fix

Fixes npm ERR! 405 Method Not Allowed

# Run with verbose logging
npm publish --verbose
  1. Identify which operation is blocked
  2. Test direct connection
  3. Configure proxy to allow methods
  4. Use alternative network
npm — error
# Run with verbose logging
npm publish --verbose
npm ERR! 405 Method Not Allowed

What this error means

HTTP 405 means the server understood the request but refuses to fulfill it because the HTTP method (GET, POST, PUT, DELETE) is not allowed for the requested resource. In npm's context, this usually happens during publish (PUT), unpublish (DELETE), or when a proxy incorrectly restricts certain methods. This is different from 401 (not authenticated) or 403 (forbidden) - with 405, your credentials may be fine, but the action itself is blocked at the protocol level.

Typical symptoms

  • npm publish fails with 405 error
  • npm unpublish returns Method Not Allowed
  • Error occurs through corporate proxy
  • Direct internet connection works
  • Specific npm operations fail while others work
  • Error message may mention PUT or DELETE

Common causes

  1. Corporate proxy blocking PUT/DELETE methods
  2. Registry doesn't support the operation
  3. Reverse proxy misconfiguration
  4. Private registry permission settings
  5. WAF (Web Application Firewall) blocking requests
  6. Read-only registry mirror
  7. CDN caching interference

How to fix "npm ERR! 405 Method Not Allowed"

1Identify which operation is blocked

Check what npm is trying to do:

bash
# Run with verbose logging
npm publish --verbose

Look for the HTTP method being rejected (PUT for publish, DELETE for unpublish).

2Test direct connection

Bypass proxy to isolate the issue:

bash
# Temporarily remove proxy
npm config delete proxy
npm config delete https-proxy

# Try operation again
npm publish

If it works, proxy is the issue.

3Configure proxy to allow methods

Work with IT to allow PUT/DELETE through proxy:

1. Request PUT method be allowed for registry.npmjs.org
2. Or for *.npmjs.org if using scoped packages
3. Provide business justification for publishing packages

4Use alternative network

For publishing, temporarily use unrestricted network:

bash
# Connect to mobile hotspot or
# Use VPN that doesn't restrict methods
npm publish
5Check private registry configuration

If using private registry:

bash
# Verify registry URL
npm config get registry

# Check if it's a read-only mirror
# Contact registry admin about write permissions
6Use npm Enterprise or proxy

For organizations, consider:

bash
# Internal npm registry that allows all methods
npm config set registry https://npm.internal.company.com

# Or use Verdaccio/Nexus with proper permissions

Advanced notes

Enterprise proxies often restrict HTTP methods for security. Work with security team to create exceptions for npm registry traffic. Consider using a private npm registry inside the corporate network that can publish to public npm without proxy restrictions. In CI/CD, use dedicated runners that have unrestricted access for publishing workflows.

Frequently asked questions

What does "npm ERR! 405 Method Not Allowed" mean?
HTTP 405 means the server understood the request but refuses to fulfill it because the HTTP method (GET, POST, PUT, DELETE) is not allowed for the requested resource. In npm's context, this usually happens during publish (PUT), unpublish (DELETE), or when a proxy incorrectly restricts certain methods. This is different from 401 (not authenticated) or 403 (forbidden) - with 405, your credentials may be fine, but the action itself is blocked at the protocol level.
How do I fix "npm ERR! 405 Method Not Allowed"?
The HTTP 405 Method Not Allowed error in npm occurs when the registry or proxy rejects the HTTP method used by npm. This typically indicates a misconfigured proxy, registry, or permission issue.
What causes "npm ERR! 405 Method Not Allowed"?
Corporate proxy blocking PUT/DELETE methods Registry doesn't support the operation Reverse proxy misconfiguration
Is the "npm ERR! 405 Method Not Allowed" error serious?
It is a medium-severity error — more of a blocker than a risk. The steps above resolve it.

Official resources & further reading