Engine runs on your own machine — the client starts it, so there is no endpoint to ping. 28 installs a week from npm.
AIN bias & stability engine: finance, gaming, AI, crypto. 68 tools across 11 categories.
The linked repository no longer exists on GitHub — it was deleted or made private.
What the code does
We have not read this server's code yet, 16 d ago · rules ccca72095570
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.
const child = spawn(cmd, args, {
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 engine -e 'ZPL_API_KEY=<ZPL_API_KEY>' -- npx -y zpl-engine-mcp{
"mcpServers": {
"engine": {
"command": "npx",
"args": [
"-y",
"zpl-engine-mcp"
],
"env": {
"ZPL_API_KEY": "<ZPL_API_KEY>"
}
}
}
}[mcp_servers.engine]
command = "npx"
args = ["-y", "zpl-engine-mcp"]
env = { ZPL_API_KEY = "<ZPL_API_KEY>" }{
"mcpServers": {
"engine": {
"command": "npx",
"args": [
"-y",
"zpl-engine-mcp"
],
"env": {
"ZPL_API_KEY": "<ZPL_API_KEY>"
}
}
}
}{
"servers": {
"engine": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"zpl-engine-mcp"
],
"env": {
"ZPL_API_KEY": "<ZPL_API_KEY>"
}
}
}
}Put your own value in place of
<ZPL_API_KEY> (User API key from zeropointlogic.io/dashboard/api-keys. Format: zpl_u_ + 48 hex chars. Service keys (zpl_s_) are rejected since v3.5.0).
The author’s registry entry marks it as required.
Optional settings from the registry entry, left out of the block above:
ZPL_MODE (pure (default) hides AIN score from the AI on text-evaluation tools to prevent observer effect. coach exposes the score), ZPL_ENGINE_URL (Engine base URL. Defaults to https://engine.zeropointlogic.io), ANTHROPIC_API_KEY (Only required for the 8 AI-eval tools (zpl_consistency_test, zpl_sycophancy_score, etc). Session capped at 100 Claude calls per process).
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Engine — questions
Answers built from our own checks of this server.