Massed Compute Server

A Model Context Protocol server that lets AI assistants — Claude, Cursor, Codex, ChatGPT, and other MCP-compatible clients — interact with your Massed Compute account: browse GPU inventory, launch and manage VMs, audit billing.

Contents

• Overview
• Installation
• Verifying the connection
• CLI reference
• Key resolution
• Resources
• License

Overview

The server exposes 14 tools that map 1:1 to documented /api/v1/* endpoints — no internal services, no undocumented calls. Issue a read-only key for analysis-only assistants and destructive tools (launch, restart, terminate, SSH-key changes) are hidden from the catalog entirely. Works with Claude Code, Claude Desktop, Cursor, and Codex.

Tool	Required key	Returns
gpu_inventory_list	read-only	GPU configurations, pricing, regional capacity
images_list	read-only	VM image catalog
instances_list	read-only	Your running VM instances
instances_get	read-only	A single instance by UUID
instances_launch	full	Newly-launched instance details (incurs cost)
instances_restart	full	Restart confirmation
instances_terminate	full	Termination confirmation (destructive)
coupon_information	read-only	Coupon discount terms
coupon_accepted_products	read-only	Products a coupon applies to
account_token_validation	read-only	Token validity status
account_billing	read-only	Billing settings, recharge configuration
ssh_keys_list	read-only	Your SSH keys
ssh_keys_create	full	Newly-created key details
ssh_keys_delete	full	Deletion confirmation (destructive)

Beyond raw tools, Massed Compute publishes Agent Skills — markdown workflow templates for common operations like GPU selection and cost auditing. Full docs at vm-docs.massedcompute.com/docs/category/mcp.

Installation

Step 1. Get your API key

Open vm.massedcompute.com/settings/api, create a key (read-only for analysis-only assistants; full-access to allow launch / restart / terminate / SSH-key changes), copy it.

Step 2. Pick an install path

• Hosted endpoint — point your client at the streamable-HTTP URL, zero install
• Local CLI — runs on your machine, key stored in your OS config dir

Hosted endpoint

Same 14 tools, same API key, nothing to install. Pick the snippet for your client:

Claude Code

claude mcp add --transport http massed-compute \
  https://vm.massedcompute.com/api/mcp \
  --header "Authorization: Bearer MC_TOKEN"

Cursor — ~/.cursor/mcp.json

{
  "mcpServers": {
    "massed-compute": {
      "url": "https://vm.massedcompute.com/api/mcp",
      "headers": { "Authorization": "Bearer MC_TOKEN" }
    }
  }
}

Codex — ~/.codex/config.toml

[mcp_servers.massed-compute]
url = "https://vm.massedcompute.com/api/mcp"
bearer_token_env_var = "MC_TOKEN"
enabled = true

Claude Desktop

Claude Desktop does not yet speak streamable-HTTP MCP, so use mcp-remote as a stdio↔HTTP bridge. Config at ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows):

{
  "mcpServers": {
    "massed-compute": {
      "command": "npx",
      "args": [
        "-y", "mcp-remote",
        "https://vm.massedcompute.com/api/mcp",
        "--header", "Authorization: Bearer MC_TOKEN"
      ]
    }
  }
}

Local CLI

Install via whichever ecosystem you prefer:

npm install -g massed-compute-mcp     # Node >= 20
# or
pip install massed-compute-mcp        # Python >= 3.10
# or
uv tool install massed-compute-mcp    # fast Python install via uv

Run one-shot setup:

massed-compute-mcp init

init prompts for the key, validates it upstream, stores it at 0600 (POSIX), detects installed MCP clients (Claude Code, Cursor, Claude Desktop, Codex), and offers to wire each one. A timestamped backup is taken before any client edit. Restart wired clients to pick up the tools.

Config file location:

• Linux: $XDG_CONFIG_HOME/massed-compute/config.json (falls back to ~/.config/...)
• macOS: ~/Library/Application Support/massed-compute/config.json
• Windows: %APPDATA%\massed-compute\config.json

Non-interactive (CI / scripts):

# Key from env, auto-wire every detected client
MASSED_COMPUTE_API_KEY=<your-key> massed-compute-mcp init --yes

# Key from a file, wire only specific clients
massed-compute-mcp init --token-file ~/keys/mc --yes --clients claude-code,cursor

# Store the key only; don't touch any client config
massed-compute-mcp init --yes --no-install-clients

Add or remove a client later:

massed-compute-mcp install-client cursor       # claude-desktop | codex | claude-code
massed-compute-mcp uninstall-client cursor

install-client is idempotent — re-running when the entry already matches is a silent no-op.

Verifying the connection

massed-compute-mcp doctor

doctor confirms the stored key still works, prints the tool catalog, and shows copy-pasteable snippets for any clients you didn't auto-wire. Or just ask your assistant "Validate my Massed Compute API key." — a { message: "Valid Token" } response confirms the wiring.

CLI reference

Command	What it does
massed-compute-mcp (no args)	Run the MCP server over stdio
massed-compute-mcp init	First-run setup: prompt, validate, store, wire clients
massed-compute-mcp doctor	Verify the stored key and print client snippets
massed-compute-mcp install-client <id>	Wire a single client (claude-code, cursor, claude-desktop, codex)
massed-compute-mcp uninstall-client <id>	Remove our entry from a client config
massed-compute-mcp config show	Print resolved config path, masked key, resolution chain
massed-compute-mcp logout	Delete the stored API key
massed-compute-mcp tools [--json]	Print the tool catalog (no upstream call)
massed-compute-mcp version	Print the version

Key resolution

When the server starts, the API key is taken from the first source that provides one:

1. --token <value> CLI flag
2. --token-file <path> CLI flag (first line, trimmed)
3. MASSED_COMPUTE_API_KEY environment variable
4. Stored config file written by init

If none of those are set, the server exits non-zero with a pointer to massed-compute-mcp init. Override the upstream with MASSED_COMPUTE_API_BASE_URL (default https://vm.massedcompute.com).

Resources

• Full MCP documentation
• Massed Compute API reference
• Massed Compute console
• Model Context Protocol spec

License

MIT — see LICENSE.