# hlandau/acmetool

:lock: acmetool, an automatic certificate acquisition tool for ACME (Let's Encrypt)

Repository: https://github.com/hlandau/acmetool
Canonical: https://ross.abutalabs.com/products/acmetool
Homepage: https://hlandau.github.io/acmetool/
Language: Go
License Family: other
Topics: acmetool, certificate, acme-server, acme, letsencrypt, ssl, tls, x509
Last push: 2023-05-27T19:22:43+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 3945, "days_push": 1194, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2092, forks 125 (observed 2026-08-28T04:06:12.542363+00:00)

## What it is
acmetool is a command-line tool for automatically acquiring and renewing TLS certificates from ACME servers such as Let's Encrypt. It works like 'make' over a simple state directory, is idempotent, and integrates with any webserver without modifying its configuration.

## Use cases
- automatically obtain let's encrypt certificates
- renew ssl certificates on a cron job
- get tls certs without modifying webserver config
- self-host https with automatic certificate renewal
- manage acme certificates for multiple domains
- redirect http to https with built-in responder

## When to choose
- you want a single dependency-free binary for ACME certificate management
- you need zero-downtime automatic renewal with any webserver
- you prefer transparent, documented flat-file state over client-managed config
- you want an idempotent, fully scriptable certificate tool

## When to avoid
- you want a client that automatically configures nginx or apache for you
- you need GUI-based certificate management
- you require frequent new features or active development, as releases have slowed

## Facets
- artifact type: cli-tool
- maturity: maintenance
- function: security, cli, deployment
- domain: security, self-hosted, web-development
- platform: cli, cross-platform
- tags: acme, lets-encrypt, tls-certificates, x509, certificate-renewal, go, devops, linux, macos

## Member repositories
- hlandau/acmetool (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:12.542363+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:55:30.633019+00:00, confidence not recorded.
  - readme: https://github.com/hlandau/acmetool (fetched 2026-08-28T04:06:12.542363+00:00, sha d63ee19bf1a3)
  - homepage: https://hlandau.github.io/acmetool/ (fetched 2026-08-29T10:35:10.010841+00:00, sha 5f032f58a640)
- Data as of 2026-08-30T08:39:29.467469+00:00.