Mergewarden runs on your own machine — the client starts it, so there is no endpoint to ping. 54 installs a week from npm. Last commit 10 Sep 2026.
Check whether a coding agent's changes stayed inside the scope it was given.
Nothing serious here today
Today is the operative word: we check Mergewarden 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 mergewarden -- npx -y mergewarden-mcp{
"mcpServers": {
"mergewarden": {
"args": [
"-y",
"mergewarden-mcp"
],
"command": "npx"
}
}
}[mcp_servers.mergewarden]
command = "npx"
args = ["-y", "mergewarden-mcp"]{
"mcpServers": {
"mergewarden": {
"args": [
"-y",
"mergewarden-mcp"
],
"command": "npx"
}
}
}{
"mcpServers": {
"mergewarden": {
"args": [
"-y",
"mergewarden-mcp"
],
"command": "npx"
}
}
}Alternatives to Mergewarden
same job, measured the same wayCheck whether a Claude Code skill was tested and whether it works before installing it.
Checks the context files a coding agent reads against the git index, and reports what drifted.
Tests an AI agent's purchase against the task it was given. Paid per call in USDC via x402.
Your coding agent tells a coworker's agent what you found or changed. Invite-only.
Give your coding agent the dependency graph it is about to change: scan, diff, explain, audit
Catches your AI coding agent when it games the tests - locked-test hashes, tamper detection.
Deploy a site to its SFTP/FTP host from a coding agent. Changed files only, undo, live checks.
Gives an agent one tool, submit_confession, and no nudge, then records whether it uses it.
Mergewarden — questions
Answers built from our own checks of this server.