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vastai-mcp

by dam2452
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Python

vastai-mcp

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Vast.ai GPU cloud marketplace and instance management MCP server.

Wraps the Vast.ai REST API (https://console.vast.ai/api/v0) so an LLM agent can search the GPU marketplace, rent machines, manage lifecycle, run commands, and inspect billing.

Table of contents

Related MCP server: cashpilot-mcp

Tools

Tool

Parameters

Description

search_offers

query: Dict[str, Any]

Search the GPU marketplace (POST /bundles/)

search_benchmarks

gpu_name: Optional[str] = None

GPU benchmark data (GET /benchmarks/)

search_templates

select_filters: Optional[Dict] = None

Search user and public templates (GET /template/)

get_gpu_metrics

gpu_name, verified, datacenter

Current supply/demand/pricing snapshot

get_gpu_trends

gpu_names, window_hours=24, step

Historical price/supply time-series

list_instances

label: Optional[str] = None

List user's instances (GET /instances/)

get_instance

instance_id: int

Instance details (GET /instances/{id}/)

create_instance

offer_id, image/template_hash_id, disk, runtype, env, onstart, price, ...

Rent a GPU (PUT /asks/{offer_id}/)

manage_instance

instance_id, action: Literal[...], label?

start/stop/label/reboot/recycle

destroy_instance

instance_id: int

Permanently destroy (DELETE /instances/{id}/)

change_bid

instance_id, price: float

Change spot bid price

show_instance_logs

instance_id, tail=1000

Request instance logs

execute_command

instance_id, command: str

Run a remote command

get_current_user

none

Current account + credit balance

raw_request

method, path, params?, body?

Escape hatch for any other endpoint

register_ssh_key

name, public_key_path

Register a local public key on the Vast.ai account (POST /ssh/)

list_ssh_keys

none

List registered SSH keys (GET /ssh/)

get_instance_ssh_info

instance_id

Resolve ssh_host/ssh_port + ready-to-run ssh command

ssh_exec

instance_id, command, key_path?, user="root", timeout=30

Run a command over SSH (paramiko)

ssh_transfer

direction: Literal["upload","download"], instance_id, local_path, remote_path, key_path?, user="root"

SFTP upload/download between local disk and instance

The query body for search_offers follows the Vast.ai filter operator convention: each field maps to {eq, neq, gt, lt, gte, lte, in, notin}. Example:

{
  "gpu_name": {"in": ["RTX 4090"]},
  "num_gpus": {"gte": 1},
  "reliability": {"gte": 0.99},
  "verified": {"eq": true},
  "rentable": {"eq": true},
  "type": "ondemand",
  "limit": 5
}

Environment variables

Variable

Required

Description

VASTAI_MCP_API_KEY

yes

Vast.ai API key (https://cloud.vast.ai/manage-keys/)

VASTAI_MCP_SSH_KEY_PATH

no

Default path to your SSH private key, used by ssh_exec and ssh_transfer when key_path is not passed per-call

Wiring it up

Only requirement: uv (https://docs.astral.sh/uv/). Nothing else to install.

Claude Code

claude mcp add vastai-mcp -e VASTAI_MCP_API_KEY=<value> -- uvx --from git+https://github.com/dam2452/vastai-mcp.git vastai-mcp

Claude Desktop / other MCP client

{
  "mcpServers": {
    "vastai-mcp": {
      "command": "uvx",
      "args": ["--from", "git+https://github.com/dam2452/vastai-mcp.git", "vastai-mcp"],
      "env": { "VASTAI_MCP_API_KEY": "<value>" }
    }
  }
}

After pushing a new version: uv cache clean and restart the client.

Local run

uv run --directory . vastai-mcp

Tests (manual):

uv run --directory . --with pytest pytest test/
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