Cyberchef MCP runs on your own machine — the client starts it, so there is no endpoint to ping. 154 installs a week from npm. Last commit 20 Sep 2026.
CyberChef's 504 data-transformation operations as MCP tools: encryption, encoding, forensics.
What the code does
We read the source, 11 h ago · rules 3dff92dd89df
What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.
postinstall: node scripts/patch-dependencies.mjs
этот файл ставится пользователю, но в репозитории его нет
const child = spawn(command, args, { stdio: "inherit", ...options });
# Run as root for build operations (Chainguard -dev includes root user) USER root
note: "Linux /etc/shadow default on most modern distributions." },
"NgAwAHEAawALABAAEAAAABAAAAAAAGsAEAB9AQUAIAAFAFYAKwDHAFEABQAAAAAAAAAFAGEDOwB2AAUAAAYLAAUABQCvDQAAAACpHgAABQDrBQAABQAXAQ4CBQBCAQsACwAAANcAAABDBAAA9ggLAB8OBQAAAK8WwwEAAO0gUQMQAAAAZwYVABUAGAQVAO0mVgALAAsAAAC3AwAAsgaoAT0B4RRVDhcB1wAgAAsJhgALAOIACQXnACsGFwELAC8CswR1ApYAXQTMAAAAxwY…
Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.
This code can reach further than it looks
We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.
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 cyberchef-mcp -- npx -y cyberchef-mcp{
"mcpServers": {
"cyberchef-mcp": {
"args": [
"-y",
"cyberchef-mcp"
],
"command": "npx"
}
}
}[mcp_servers.cyberchef-mcp]
command = "npx"
args = ["-y", "cyberchef-mcp"]{
"mcpServers": {
"cyberchef-mcp": {
"args": [
"-y",
"cyberchef-mcp"
],
"command": "npx"
}
}
}{
"mcpServers": {
"cyberchef-mcp": {
"args": [
"-y",
"cyberchef-mcp"
],
"command": "npx"
}
}
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Cyberchef MCP — questions
Answers built from our own checks of this server.