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

Features

• 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	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)
DreamHost	Duck DNS	Dyn	Dynu
EasyDNS	Exoscale	External program	FastDNS (Deprecated)
Gandi Live DNS (v5)	Gandi	Glesys	Go Daddy
Google Cloud	Hetzner	Hosting.de	HTTP request
HyperOne	Internet Initiative Japan	INWX	Joker
Joohoi's ACME-DNS	Linode (deprecated)	Linode (v4)	Liquid Web
LuaDNS	Manual	MyDNS.jp	MythicBeasts
Name.com	Namecheap	Namesilo	Netcup
Netlify	NIFCloud	NS1	Open Telekom Cloud
Oracle Cloud	OVH	PowerDNS	Rackspace
reg.ru	RFC2136	RimuHosting	Sakura Cloud
Scaleway	Selectel	Servercow	Stackpath
TransIP	VegaDNS	Versio.[nl/eu/uk]	Vscale
Vultr	Yandex	Zone.ee	Zonomi