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

Project README
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Automatic Certificates and HTTPS for everyone.


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

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  • 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


How to install.



Documentation is hosted live at

DNS providers

Detailed documentation is available here.

Akamai EdgeDNS Alibaba Cloud DNS all-inkl Amazon Lightsail
Amazon Route 53 ArvanCloud Aurora DNS Autodns
Azure Bindman Bluecat Checkdomain
Civo CloudDNS Cloudflare ClouDNS
CloudXNS ConoHa Constellix
Designate DNSaaS for Openstack Digital Ocean DNS Made Easy DNSimple
DNSPod (deprecated) Domain Offensive ( Domeneshop DreamHost
Duck DNS Dyn Dynu EasyDNS
Epik Exoscale External program
G-Core Labs Gandi Live DNS (v5) Gandi Glesys
Go Daddy Google Cloud Hetzner
Hosttech HTTP request Hurricane Electric DNS HyperOne
IBM Cloud (SoftLayer) IIJ DNS Platform Service Infoblox Infomaniak
Internet Initiative Japan INWX Ionos
iwantmyname Joker Joohoi's ACME-DNS Liara
Linode (v4) Liquid Web Loopia LuaDNS
Manual MythicBeasts
Namecheap Namesilo NearlyFreeSpeech.NET Netcup
Netlify Nicmanager NIFCloud Njalla
NS1 Open Telekom Cloud Oracle Cloud OVH
Porkbun PowerDNS Rackspace
RFC2136 RimuHosting Sakura Cloud Scaleway
Selectel Servercow Sonic
Stackpath Tencent Cloud DNS TransIP UKFast SafeDNS
Ultradns Variomedia VegaDNS Vercel
Versio.[nl/eu/uk] VinylDNS VK Cloud Vscale
Vultr WEDOS Yandex Cloud Yandex PDD Zonomi

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

Open Source Agenda is not affiliated with "Lego" Project. README Source: go-acme/lego
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