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
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	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.