Lego

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

Features

ACME v2 RFC 8555
- Support RFC 8737: TLS Application‑Layer Protocol Negotiation (ALPN) Challenge Extension
- Support RFC 8738: certificates for IP addresses
- Support draft-ietf-acme-ari-03: Renewal Information (ARI) Extension
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
CNAME support by default
Comes with multiple optional DNS providers
Custom challenge solvers
Certificate bundling
OCSP helper function

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 (deprecated)	Azure DNS	Bindman	Bluecat
Brandit	Bunny	Checkdomain	Civo
Cloud.ru	CloudDNS	Cloudflare	ClouDNS
CloudXNS	ConoHa	Constellix	CPanel/WHM
Derak Cloud	deSEC.io	Designate DNSaaS for Openstack	Digital Ocean
DirectAdmin	DNS Made Easy	dnsHome.de	DNSimple
DNSPod (deprecated)	Domain Offensive (do.de)	Domeneshop	DreamHost
Duck DNS	Dyn	Dynu	EasyDNS
Efficient IP	Epik	Exoscale	External program
freemyip.com	G-Core	Gandi Live DNS (v5)	Gandi
Glesys	Go Daddy	Google Cloud	Google Domains
Hetzner	Hosting.de	Hosttech	HTTP request
http.net	Hurricane Electric DNS	HyperOne	IBM Cloud (SoftLayer)
IIJ DNS Platform Service	Infoblox	Infomaniak	Internet Initiative Japan
Internet.bs	INWX	Ionos	IPv64
iwantmyname	Joker	Joohoi's ACME-DNS	Liara
Lima-City	Linode (v4)	Liquid Web	Loopia
LuaDNS	Mail-in-a-Box	Manual	Metaname
mijn.host	MyDNS.jp	MythicBeasts	Name.com
Namecheap	Namesilo	NearlyFreeSpeech.NET	Netcup
Netlify	Nicmanager	NIFCloud	Njalla
Nodion	NS1	Open Telekom Cloud	Oracle Cloud
OVH	plesk.com	Porkbun	PowerDNS
Rackspace	RcodeZero	reg.ru	RFC2136
RimuHosting	Sakura Cloud	Scaleway	Selectel v2
Selectel	Servercow	Shellrent	Simply.com
Sonic	Stackpath	Tencent Cloud DNS	TransIP
UKFast SafeDNS	Ultradns	Variomedia	VegaDNS
Vercel	Versio.[nl/eu/uk]	VinylDNS	VK Cloud
Vscale	Vultr	Webnames	Websupport
WEDOS	Yandex 360	Yandex Cloud	Yandex PDD
Zone.ee	Zonomi

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