go-acme.github.io/lego

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https://go-acme.github.io/lego

Lego :: Let’s Encrypt client and ACME library written in Go.

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: issues certificates for IP addresses Support RFC 9773: Renewal Information (ARI) Extension Support draft-aaron-acme-profiles-00: Profiles Extension Comes with about 150 DNS providers Register with CA Obtain certificates, both from scratch or with an existing CSR Renew certificates Revoke certificates Robust implementation of ACME challenges: HTTP (http-01) DNS (dns-01) TLS (tls-alpn-01) SAN certificate support CNAME support by default Custom challenge solvers Certificate bundling OCSP helper function



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Lego :: Let’s Encrypt client and ACME library written in Go.

https://go-acme.github.io/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: issues certificates for IP addresses Support RFC 9773: Renewal Information (ARI) Extension Support draft-aaron-acme-profiles-00: Profiles Extension Comes with about 150 DNS providers Register with CA Obtain certificates, both from scratch or with an existing CSR Renew certificates Revoke certificates Robust implementation of ACME challenges: HTTP (http-01) DNS (dns-01) TLS (tls-alpn-01) SAN certificate support CNAME support by default Custom challenge solvers Certificate bundling OCSP helper function



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https://go-acme.github.io/lego

Lego :: Let’s Encrypt client and ACME library written in Go.

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: issues certificates for IP addresses Support RFC 9773: Renewal Information (ARI) Extension Support draft-aaron-acme-profiles-00: Profiles Extension Comes with about 150 DNS providers Register with CA Obtain certificates, both from scratch or with an existing CSR Renew certificates Revoke certificates Robust implementation of ACME challenges: HTTP (http-01) DNS (dns-01) TLS (tls-alpn-01) SAN certificate support CNAME support by default Custom challenge solvers Certificate bundling OCSP helper function

  • General Meta Tags

    7
    • title
      Lego :: Let’s Encrypt client and ACME library written in Go.
    • charset
      utf-8
    • viewport
      height=device-height, width=device-width, initial-scale=1.0, minimum-scale=1.0
    • generator
      Hugo 0.131.0
    • generator
      Relearn 6.1.1

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    • og:url
      https://go-acme.github.io/lego/index.html
    • og:site_name
      Let’s Encrypt client and ACME library written in Go.
    • og:title
      Lego :: Let’s Encrypt client and ACME library written in Go.
    • og:description
      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: issues certificates for IP addresses Support RFC 9773: Renewal Information (ARI) Extension Support draft-aaron-acme-profiles-00: Profiles Extension Comes with about 150 DNS providers Register with CA Obtain certificates, both from scratch or with an existing CSR Renew certificates Revoke certificates Robust implementation of ACME challenges: HTTP (http-01) DNS (dns-01) TLS (tls-alpn-01) SAN certificate support CNAME support by default Custom challenge solvers Certificate bundling OCSP helper function
    • og:locale
      en

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      summary
    • twitter:title
      Lego :: Let’s Encrypt client and ACME library written in Go.
    • twitter:description
      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: issues certificates for IP addresses Support RFC 9773: Renewal Information (ARI) Extension Support draft-aaron-acme-profiles-00: Profiles Extension Comes with about 150 DNS providers Register with CA Obtain certificates, both from scratch or with an existing CSR Renew certificates Revoke certificates Robust implementation of ACME challenges: HTTP (http-01) DNS (dns-01) TLS (tls-alpn-01) SAN certificate support CNAME support by default Custom challenge solvers Certificate bundling OCSP helper function

  • Item Prop Meta Tags

    6
    • name
      Lego :: Let’s Encrypt client and ACME library written in Go.
    • description
      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: issues certificates for IP addresses Support RFC 9773: Renewal Information (ARI) Extension Support draft-aaron-acme-profiles-00: Profiles Extension Comes with about 150 DNS providers Register with CA Obtain certificates, both from scratch or with an existing CSR Renew certificates Revoke certificates Robust implementation of ACME challenges: HTTP (http-01) DNS (dns-01) TLS (tls-alpn-01) SAN certificate support CNAME support by default Custom challenge solvers Certificate bundling OCSP helper function
    • datePublished
      2019-03-03T16:39:46+01:00
    • dateModified
      2025-06-19T16:31:33+02:00
    • wordCount
      92

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    • alternate
      /lego/index.xml
    • icon
      /lego/images/favicon.svg?1754670651
    • icon
      /lego/images/favicon.png?1754670651
    • stylesheet
      /lego/css/fontawesome-all.min.css?1754670651
    • stylesheet
      /lego/css/nucleus.css?1754670651

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