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-01: 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	Bindman	Bluecat	Brandit
Bunny	Checkdomain	Civo	CloudDNS
Cloudflare	ClouDNS	CloudXNS	ConoHa
Constellix	Derak Cloud	deSEC.io	Designate DNSaaS for Openstack
Digital Ocean	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 Labs	Gandi Live DNS (v5)	Gandi
Glesys	Go Daddy	Google Cloud	Google Domains
Hetzner	Hosting.de	Hosttech	HTTP request
Hurricane Electric DNS	HyperOne	IBM Cloud (SoftLayer)	IIJ DNS Platform Service
Infoblox	Infomaniak	Internet Initiative Japan	Internet.bs
INWX	Ionos	iwantmyname	Joker
Joohoi's ACME-DNS	Liara	Linode (v4)	Liquid Web
Loopia	LuaDNS	Manual	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	Servercow	Simply.com
Sonic	Stackpath	Tencent Cloud DNS	TransIP
UKFast SafeDNS	Ultradns	Variomedia	VegaDNS
Vercel	Versio.[nl/eu/uk]	VinylDNS	VK Cloud
Vscale	Vultr	Websupport	WEDOS
Yandex Cloud	Yandex PDD	Zone.ee	Zonomi

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