# sergi0g/cup

🥤Docker container updates made easy

Repository: https://github.com/sergi0g/cup
Canonical: https://ross.abutalabs.com/products/cup
Homepage: https://cup.sergi0g.dev
Language: Rust
License: AGPL-3.0
License Family: copyleft
Topics: container, docker, docker-container, docker-image, dockerhub, update, react, rust, updates, cli, self-hosted, server, tailwindcss, terminal, update-checker
Last push: 2026-07-22T18:25:31+00:00

## Health v2 (maintenance only)
Score: 73/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 93, release rhythm 57, longevity 57
- inputs: {"age_days": 809, "days_push": 42, "days_rel": 285, "gap_med": 6.5, "n_releases_24m": 23}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1340, forks 25 (observed 2026-08-28T04:04:26.017256+00:00)

## What it is
Cup is a lightweight Rust utility for checking whether Docker (or Podman) container images have available updates. It offers both a fast CLI and a self-hosted web server with a dashboard and JSON API for integrations.

## Use cases
- check which of my docker containers have image updates available
- avoid docker hub rate limits when checking for container updates
- self-hosted dashboard for container image update status
- get container update info as  for home assistant or homepage widgets
- run a cron job to check container updates from the terminal
- monitor multiple servers' container updates from one web interface
- lightweight alternative to what's up docker

## When to choose
- you want fast, tiny-footprint update checking without pulling large docker images
- you're hitting registry rate limits with other update checkers
- you only need update visibility, not automatic container updates or triggering integrations
- you want a simple CLI plus an optional web dashboard with JSON API

## When to avoid
- you need automatic container updates or direct integration triggering (use Watchtower or What's up Docker)
- you need a mature feature-complete tool with extensive ecosystem support
- you don't run Docker or Podman containers

## Facets
- artifact type: cli-tool
- maturity: active
- function: monitoring, developer-tools, http-server, cli
- domain: self-hosted, developer-tools
- platform: self-hosted, cli, rust
- tags: docker-image-updates, container-update-checker, whats-up-docker-alternative, registry-checking, rate-limit-friendly, -api, home-assistant-integration, podman-support, devops, containers, linux, docker, web-server

## Member repositories
- sergi0g/cup (main) score 73

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:26.017256+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 2026-08-30T04:43:52.721839+00:00, confidence not recorded.
  - readme: https://github.com/sergi0g/cup (fetched 2026-08-28T04:04:26.017256+00:00, sha 30d07b080544)
  - homepage: https://cup.sergi0g.dev (fetched 2026-08-29T12:02:52.074209+00:00, sha c48fa31fc602)
  - site_page: https://cup.sergi0g.dev/docs (fetched 2026-08-29T12:02:52.083181+00:00, sha a6c97829e892)
  - site_page: https://cup.sergi0g.dev/docs/installation/docker (fetched 2026-08-29T12:02:52.084895+00:00, sha 4141493af125)
  - site_page: https://cup.sergi0g.dev/docs/installation/binary (fetched 2026-08-29T12:02:52.086306+00:00, sha fe04a81b1a3b)
  - site_page: https://cup.sergi0g.dev/docs/usage (fetched 2026-08-29T12:02:52.087784+00:00, sha f20aae334324)
  - site_page: https://cup.sergi0g.dev/docs/usage/cli (fetched 2026-08-29T12:02:52.089360+00:00, sha 79d7360c6689)
  - site_page: https://cup.sergi0g.dev/docs/usage/server (fetched 2026-08-29T12:02:52.091169+00:00, sha f3fe9c072984)
  - site_page: https://cup.sergi0g.dev/docs/configuration (fetched 2026-08-29T12:02:52.092587+00:00, sha b5bc69d5b8cf)
  - site_page: https://cup.sergi0g.dev/docs/configuration/agent (fetched 2026-08-29T12:02:52.094234+00:00, sha d0947d07f42b)
- Data as of 2026-08-30T08:39:29.467469+00:00.