Arc Free Skills runs on your own machine — the client starts it, so there is no endpoint to ping. 171 installs a week from pypi. Last commit 3 Oct 2026.
100 systems and hardware engineering skills for requirements, interfaces, budgets and verification.
Nothing serious here today
Today is the operative word: we check Arc Free Skills every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
Connect this server
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add arc-free-skills -e 'ARC_FREE_SKILLS_WORKSPACE=<ARC_FREE_SKILLS_WORKSPACE>' -- uvx arc-free-skills{
"mcpServers": {
"arc-free-skills": {
"command": "uvx",
"args": [
"arc-free-skills"
],
"env": {
"ARC_FREE_SKILLS_WORKSPACE": "<ARC_FREE_SKILLS_WORKSPACE>"
}
}
}
}[mcp_servers.arc-free-skills]
command = "uvx"
args = ["arc-free-skills"]
env = { ARC_FREE_SKILLS_WORKSPACE = "<ARC_FREE_SKILLS_WORKSPACE>" }{
"mcpServers": {
"arc-free-skills": {
"command": "uvx",
"args": [
"arc-free-skills"
],
"env": {
"ARC_FREE_SKILLS_WORKSPACE": "<ARC_FREE_SKILLS_WORKSPACE>"
}
}
}
}{
"servers": {
"arc-free-skills": {
"type": "stdio",
"command": "uvx",
"args": [
"arc-free-skills"
],
"env": {
"ARC_FREE_SKILLS_WORKSPACE": "<ARC_FREE_SKILLS_WORKSPACE>"
}
}
}
}Put your own value in place of
<ARC_FREE_SKILLS_WORKSPACE> (Absolute path to an existing dedicated folder for inputs and new outputs; do not use your home directory).
The author’s registry entry marks it as required.
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Arc Free Skills — questions
Answers built from our own checks of this server.