Let's Encrypt client and ACME library written in Go.

Features

• ACME v2 RFC 8555
• Register with CA
• Obtain certificates, both from scratch or with an existing CSR
• Renew certificates
• Revoke certificates
• Robust implementation of all ACME challenges
  • HTTP (http-01)
  • DNS (dns-01)
  • TLS (tls-alpn-01)
• SAN certificate support
• Comes with multiple optional DNS providers
• Custom challenge solvers
• Certificate bundling
• OCSP helper function

lego introduced support for ACME v2 in v1.0.0. If you still need to utilize ACME v1, you can do so by using the v0.5.0 version.

Installation

How to install.

Usage

• as a CLI
• as a library

Documentation

Documentation is hosted live at https://go-acme.github.io/lego/.

DNS providers

Detailed documentation is available here.

Akamai EdgeDNS	Alibaba Cloud DNS	all-inkl	Amazon Lightsail
Amazon Route 53	ArvanCloud	Aurora DNS	Autodns
Azure	Bindman	Bluecat	Checkdomain
CloudDNS	Cloudflare	ClouDNS	CloudXNS
ConoHa	Constellix	deSEC.io	Designate DNSaaS for Openstack
Digital Ocean	DNS Made Easy	DNSimple	DNSPod
Domain Offensive (do.de)	Domeneshop	DreamHost	Duck DNS
Dyn	Dynu	EasyDNS	Epik
Exoscale	External program	freemyip.com	G-Core Labs
Gandi Live DNS (v5)	Gandi	Glesys	Go Daddy
Google Cloud	Hetzner	Hosting.de	Hosttech
HTTP request	Hurricane Electric DNS	HyperOne	IBM Cloud (SoftLayer)
Infoblox	Infomaniak	Internet Initiative Japan	Internet.bs
INWX	Ionos	Joker	Joohoi's ACME-DNS
Linode (v4)	Liquid Web	Loopia	LuaDNS
Manual	MyDNS.jp	MythicBeasts	Name.com
Namecheap	Namesilo	Netcup	Netlify
Nicmanager	NIFCloud	Njalla	NS1
Open Telekom Cloud	Oracle Cloud	OVH	Porkbun
PowerDNS	Rackspace	reg.ru	RFC2136
RimuHosting	Sakura Cloud	Scaleway	Selectel
Servercow	Simply.com	Sonic	Stackpath
TransIP	VegaDNS	Versio.[nl/eu/uk]	VinylDNS
Vscale	Vultr	WEDOS	Yandex
Zone.ee	Zonomi

If your DNS provider is not supported, please open an issue.