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what is acme4j fr?

fieldju/acme4j — explained in plain English

Analysis updated 2026-07-17 · repo last pushed 2017-10-31

JavaAudience · developerComplexity · 3/5DormantSetup · moderate

tl;dr

A Java library that automates getting and renewing SSL certificates from ACME servers like Let's Encrypt, so certificates never expire unnoticed.

vibe map

mindmap
  root((repo))
    What it does
      Automates SSL certificates
      Talks to ACME servers
      Handles domain verification
      Auto renewal
    Tech stack
      Java
      Maven
      ACME protocol
    Use cases
      HTTPS for Java services
      Avoid manual renewal
      Prevent expired certs
    Audience
      Java developers
      Backend engineers
    Setup
      Add via Maven
      Lightweight deps
    Notes
      Supports ACME v1
      v2 in separate branch

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what do people make with this?

VIBE 1

Automatically request and renew SSL certificates for a Java-based web service.

VIBE 2

Integrate Let's Encrypt certificate issuance directly into a Java application.

VIBE 3

Avoid outages caused by expired HTTPS certificates through automated renewal.

VIBE 4

Programmatically prove domain ownership as part of the ACME verification flow.

what's the stack?

JavaMavenACMELet's Encrypt

how it stacks up fr

fieldju/acme4jasutosh936/job-finder-appasutosh936/spring-boot
Stars—0—
LanguageJavaJavaJava
Last pushed2017-10-31—2016-07-02
MaintenanceDormant—Dormant
Setup difficultymoderatemoderatemoderate
Complexity3/52/53/5
Audiencedeveloperdeveloperdeveloper

Figures from each repo's GitHub metadata at analysis time.

how do i run it?

Difficulty · moderate time til it works · 30min

Uses the older ACME v1 protocol, ACME v2 support lives in a separate branch.

prompts (copy fr)

prompt 1
Show me how to add acme4j to my Java project via Maven and request my first certificate.
prompt 2
Explain how acme4j proves domain ownership during the ACME verification process.
prompt 3
Help me set up automatic certificate renewal with acme4j so my site never has an expired cert.
prompt 4
What's the difference between the ACME v1 support in this library and the newer v2 branch?

Frequently asked questions

what is acme4j fr?

A Java library that automates getting and renewing SSL certificates from ACME servers like Let's Encrypt, so certificates never expire unnoticed.

What language is acme4j written in?

Mainly Java. The stack also includes Java, Maven, ACME.

Is acme4j actively maintained?

Dormant — no commits in 2+ years (last push 2017-10-31).

How hard is acme4j to set up?

Setup difficulty is rated moderate, with roughly 30min to a first successful run.

Who is acme4j for?

Mainly developer.

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