How to connect Vast.ai to Claude Cowork

Cowork is Anthropic's AI agent for knowledge work. Think of it as Claude Code for everything else. It works autonomously with your computer, local files, and applications to accomplish complex tasks. This guide walks you through the easiest and most secure way to connect your Vast.ai account to Cowork via Composio Connect, enabling it to find cheapest RTX 4090 GPU rentals, compare storage volume offers by price, list PyTorch launch templates for training, and more such actions on your behalf without compromising your account security.

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Vast.ai is a cloud GPU marketplace for renting compute from global providers. Use it to find flexible, low-cost GPU instances for AI training and inference.

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Introduction

Cowork is Anthropic's AI agent for knowledge work. Think of it as Claude Code for everything else. It works autonomously with your computer, local files, and applications to accomplish complex tasks.

This guide walks you through the easiest and most secure way to connect your Vast.ai account to Cowork via Composio Connect, enabling it to find cheapest RTX 4090 GPU rentals, compare storage volume offers by price, list PyTorch launch templates for training, and more such actions on your behalf without compromising your account security.

Also integrate Vast.ai with

OpenAI Agents SDKClaude Agent SDKClaude CodeCodexOpenClawHermesCLIGoogle ADKLangChainVercel AI SDKMastra AILlamaIndexCrewAI

Connecting Vast.ai to Claude Cowork

1. Open Customize

In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top.

Claude Desktop connectors screen with Add custom connector selected

2. Add the Composio MCP server

Click Add custom connector and paste in the Composio MCP server URL:

bash
https://connect.composio.dev/mcp
Add custom connector dialog with Composio MCP server URL

3. Authorize in your browser

Click Connect. You'll be redirected to a browser window where you can authorize Composio to continue.

Composio authorization screen for Claude Cowork

4. Connect your Vast.ai account

Back in Cowork, ask the agent to connect to Vast.ai or give it any Vast.ai-related task.

For example, ask Cowork to:

  • "Find cheapest RTX 4090 GPU rentals"
  • "Compare storage volume offers by price"
  • "List PyTorch launch templates for training"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Cowork, and your Vast.ai account is ready to use.

What is Claude Cowork?

Claude Cowork is Anthropic's agent for general knowledge work. It can use your computer, files, and connected applications to complete longer-running tasks across your work tools.

With Composio Connect, Cowork can securely access apps like Vast.ai through MCP without you sharing account credentials directly with the agent.

What is the Vast.ai MCP server, and what's possible with it?

The Vast.ai MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Vast.ai account. It provides structured and secure access to Vast.ai GPU compute offers, storage volume offers, and launch templates, so your agent can search rentable GPUs, compare compute options, find storage capacity, and discover suitable launch templates on your behalf.

  • GPU offer search: Have your agent find currently rentable GPU compute offers that match your workload needs.
  • Compute option comparison: Let the agent compare available GPU offers using verified marketplace criteria to help you choose a suitable option.
  • Storage offer discovery: Direct your agent to search available storage volume offers for datasets, models, and other workload files.
  • Launch template search: Instruct your agent to find Vast.ai launch templates using identifying details such as their names and metadata.
TOOLS

Supported Tools

Every Vast.ai action and event your agent gets out of the box.

Search GPU Offers

Find currently rentable Vast.

Search Templates

Search Vast.

Search Volume Offers

Find Vast.

FRAMEWORKS

How to build Vast.ai MCP Agent with another framework

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Vast.ai MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Vast.ai MCP with Claude Agent SDK

Claude Code logo

Claude Code

Use Vast.ai MCP with Claude Code

Codex logo

Codex

Use Vast.ai MCP with Codex

OpenClaw logo

OpenClaw

Use Vast.ai MCP with OpenClaw

Hermes logo

Hermes

Use Vast.ai MCP with Hermes

CLI logo

CLI

Use Vast.ai MCP with CLI

Google ADK logo

Google ADK

Use Vast.ai MCP with Google ADK

LangChain logo

LangChain

Use Vast.ai MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Vast.ai MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Vast.ai MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Vast.ai MCP with LlamaIndex

CrewAI logo

CrewAI

Use Vast.ai MCP with CrewAI

FAQ

Frequently asked questions

With a standalone Vast.ai MCP server, the agents and LLMs can only access a fixed set of Vast.ai tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Vast.ai and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. Claude Cowork fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Vast.ai tools.

Yes, absolutely. You can configure which Vast.ai scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Vast.ai data and credentials are handled as safely as possible.

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