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.

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

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	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	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	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.