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	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
Gandi Live DNS (v5)	Gandi	Glesys	Go Daddy
Google Cloud	Hetzner	Hosting.de	HTTP request
Hurricane Electric DNS	HyperOne	Infomaniak	Internet Initiative Japan
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	PowerDNS	Rackspace
reg.ru	RFC2136	RimuHosting	Sakura Cloud
Scaleway	Selectel	Servercow	Stackpath
TransIP	VegaDNS	Versio.[nl/eu/uk]	VinylDNS
Vscale	Vultr	WEDOS	Yandex
Zone.ee	Zonomi