Styx MCP Server runs on your own machine — the client starts it, so there is no endpoint to ping. 47 installs a week from npm. Last commit 14 Mar 2026.
MCP server for Styx — intelligent AI routing across OpenAI, Anthropic, Google, and Mistral.
We read the source, 1 d ago · rules 995398eba69f
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(pythonCmd, pythonArgs, {
Found in continuous integration, deployment or infrastructure files, or in a neighbouring package of the same monorepo. None of this is installed when you add the server: it describes how the project is built and released. We list it because a leaked key in a build pipeline is still a real problem, but it is not something this server does on your machine.
curl -X POST "${{ secrets.SLACK_WEBHOOK_URL }}" \
result = pickle.load(f)
Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.
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.
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 styx-mcp-server -e 'STYX_API_KEY=<STYX_API_KEY>' -e 'STYX_TOKEN=<STYX_TOKEN>' -- npx -y styx-mcp-server
{
"mcpServers": {
"styx-mcp-server": {
"command": "npx",
"args": [
"-y",
"styx-mcp-server"
],
"env": {
"STYX_API_KEY": "<STYX_API_KEY>",
"STYX_TOKEN": "<STYX_TOKEN>"
}
}
}
}
[mcp_servers.styx-mcp-server]
command = "npx"
args = ["-y", "styx-mcp-server"]
env = { STYX_API_KEY = "<STYX_API_KEY>", STYX_TOKEN = "<STYX_TOKEN>" }
{
"mcpServers": {
"styx-mcp-server": {
"command": "npx",
"args": [
"-y",
"styx-mcp-server"
],
"env": {
"STYX_API_KEY": "<STYX_API_KEY>",
"STYX_TOKEN": "<STYX_TOKEN>"
}
}
}
}
{
"servers": {
"styx-mcp-server": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"styx-mcp-server"
],
"env": {
"STYX_API_KEY": "<STYX_API_KEY>",
"STYX_TOKEN": "<STYX_TOKEN>"
}
}
}
}
Put your own values in place of
<STYX_API_KEY> (Styx API key for routing AI requests through the gateway (required for styx_send_request)), <STYX_TOKEN> (Styx auth token for project and key management (required for management tools)).
The author’s registry entry marks them as required.
Optional settings from the registry entry, left out of the block above:
STYX_API_URL (Styx backend API URL), STYX_PROXY_URL (Styx proxy URL for AI request routing).
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Answers built from our own checks of this server.