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 (deprecated)	AzureDNS	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
Metaname	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.