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	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	Gandi Live DNS (v5)
Gandi	Glesys	Go Daddy	Google Cloud
Hetzner	Hosting.de	HTTP request	HyperOne
Infomaniak	Internet Initiative Japan	INWX	Joker
Joohoi's ACME-DNS	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