automation

certmate

Name: certmate
Author: fabriziosalmi

Self-hosted certificate lifecycle management: issue, renew, discover, inventory and deploy TLS certificates across your infrastructure

1,474 stars+13★ this week119 forksPythonUpdated 10/21/2026100% free · open source

What it does

Self‑hosted tool that automatically discovers, inventories, issues, renews and deploys TLS certificates across your whole infrastructure.

When to use it

•You run multiple services (K8s, VMs, load balancers) and need a single source of truth for all TLS certificates.
•Manual certificate renewal is causing downtime or security gaps.
•You want to automate issuance from Let’s Encrypt or an internal PKI without relying on external SaaS.

Ready-to-paste prompt

certmate -c config.yaml renew --domains api.example.com,db.example.com --provider letsencrypt

Heads up: Certmate requires Python 3.9+ and a recent OpenSSL (≥1.1.1); using an older runtime will cause ACME challenges to fail.

Saves to your device

Use with Claude

New

Skip the builder — one click puts this in Claude, Cursor, Antigravity and more.

🔑 Needs an API key

Works after you add credentials — the setup agent will ask you for them.

Try it instantly — no install

Claude Code

mkdir -p ~/.claude/skills/certmate && curl -fsSL https://workflowstacks.com/api/skills/certmate/claude-skill -o ~/.claude/skills/certmate/SKILL.md

Open in another AI app

Opens the app with this repo with the prompt ready to go — no copy-paste needed.

Connect the whole catalog (MCP)

claude mcp add --transport http workflowstacks https://workflowstacks.com/api/mcp

Adds a WorkflowStacks connector to Claude Code: search and load any skill here by chatting.

How certmate works

Codeflow

Free to inspect

Certmate is a very large Python project (~95k lines across 179 code files, plus 632 test files). Setup is light: installs like a normal app — add your API keys. Reading the code is optional. Last commit this month, MIT license, has a test suite.

Size

Very large codebase

~95k lines · 179 code files · days to read — use, don't read

Setup

One-command install

Installs like a normal app — add your API keys. Reading the code is optional.

Runs on

Python · Docker

Needs API keys (.env)

Python 84%JavaScript 8%HTML 7%Shell 1%

Where to start reading

1
README.md
Start here — what it does and how to install it
2
app.py
Where the program starts running
3
package.json
Dependencies and the commands it exposes
4
.env.example
The API keys and settings you must provide
5
demo/README.md
A worked example — copy this to get going

What's in each folder

modules/Sub-packages / plugins118 files

docs/Documentation226 files

templates/Templates30 files

demo/Examples you can copy4 files

scripts/Helper scripts26 files

charts/Folder14 files

deploy/Deployment / infrastructure14 files

clients/SDKs / client libraries11 files

READMEHas testsDocumentedCI checksDocker readyExamples includedMIT licenseUpdated this month

Use with Claude

New

Skip the builder — one click puts this in Claude, Cursor, Antigravity and more.

🔑 Needs an API key

Works after you add credentials — the setup agent will ask you for them.

Try it instantly — no install

Claude Code

mkdir -p ~/.claude/skills/certmate && curl -fsSL https://workflowstacks.com/api/skills/certmate/claude-skill -o ~/.claude/skills/certmate/SKILL.md

Open in another AI app

Opens the app with this repo with the prompt ready to go — no copy-paste needed.

Connect the whole catalog (MCP)

claude mcp add --transport http workflowstacks https://workflowstacks.com/api/mcp

Adds a WorkflowStacks connector to Claude Code: search and load any skill here by chatting.

Quick Actions

Details

Creator

fabriziosalmi

Language

Python

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