# Vast.ai

```json
{
  "name": "Vast.ai",
  "slug": "vast_ai",
  "url": "https://composio.dev/toolkits/vast_ai",
  "markdown_url": "https://composio.dev/toolkits/vast_ai.md",
  "logo_url": "https://logos.composio.dev/api/vast_ai",
  "categories": [
    "ai & machine learning"
  ],
  "is_composio_managed": false,
  "updated_at": "2026-10-04T15:11:32.129Z"
}
```

![Vast.ai logo](https://logos.composio.dev/api/vast_ai)

## Description

Securely connect your AI agents and chatbots (Claude, ChatGPT, Cursor, etc) with Vast.ai MCP or direct API to search GPU compute offers, compare storage volume offers, inspect launch templates, and find cost-efficient AI infrastructure through natural language.

## Summary

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.

## Categories

- ai & machine learning

## Toolkit Details

- Tools: 3

## Images

- Logo: https://logos.composio.dev/api/vast_ai

## Authentication

- **Api Key**
  - Type: `api_key`
  - Description: Api Key authentication for Vast.ai.
  - Setup:
    - Configure Api Key credentials for Vast.ai.
    - Use the credentials when creating an auth config in Composio.

## Suggested Prompts

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

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `VAST_AI_SEARCH_GPU_OFFERS` | Search GPU Offers | Find currently rentable Vast.ai GPU compute offers using verified marketplace filters. Returns compact offer identifiers, GPU capacity, and hourly pricing for comparison; it does not rent an offer. The connected API key must include Vast.ai's misc permission category. |
| `VAST_AI_SEARCH_TEMPLATES` | Search Templates | Search Vast.ai launch templates by safe identifying metadata. The tool filters and pages locally because the provider returns a large unpaginated payload. |
| `VAST_AI_SEARCH_VOLUME_OFFERS` | Search Volume Offers | Find Vast.ai storage volume offers available in the marketplace. Returns compact location, capacity, and storage-cost details; it does not rent or modify a volume. |

## Supported Triggers

None listed.

## Installation and MCP Setup

### Path 1: SDK Installation

#### Path 1, Step 1: Install Composio

Install the Composio SDK, the OpenAI provider, and the OpenAI SDK
```python
pip install composio composio_openai openai
```

```typescript
npm install @composio/core @composio/openai openai
```

#### Path 1, Step 2: Create a Composio session

Initialize Composio with the OpenAI Responses provider and create a session scoped to Vast.ai
```python
import json
from openai import OpenAI
from composio import Composio
from composio_openai import OpenAIResponsesProvider

composio = Composio(provider=OpenAIResponsesProvider())
client = OpenAI()

session = composio.create(user_id="your-user-id", toolkits=["vast_ai"])
tools = session.tools()
```

```typescript
import OpenAI from "openai";
import { Composio } from "@composio/core";
import { OpenAIResponsesProvider } from "@composio/openai";

const composio = new Composio({ provider: new OpenAIResponsesProvider() });
const client = new OpenAI();

const session = await composio.create("your-user-id", { toolkits: ["vast_ai"] });
const tools = await session.tools();
```

#### Path 1, Step 3: Run Vast.ai tools with your agent

Send a request, execute the Vast.ai tool calls through the session, and print the final answer
```python
response = client.responses.create(
    model="gpt-5.6-sol",
    tools=tools,
    input=[{"role": "user", "content": "Find Vast.ai GPU offers with at least 24GB VRAM sorted by lowest hourly price"}],
)

while True:
    tool_calls = [o for o in response.output if o.type == "function_call"]
    if not tool_calls:
        break
    results = composio.provider.handle_tool_calls(response=response, session=session)
    response = client.responses.create(
        model="gpt-5.6-sol",
        tools=tools,
        previous_response_id=response.id,
        input=[
            {"type": "function_call_output", "call_id": call.call_id, "output": json.dumps(results[i])}
            for i, call in enumerate(tool_calls)
        ],
    )

print(response.output_text)
```

```typescript
let response = await client.responses.create({
  model: "gpt-5.6-sol",
  tools,
  input: [{ role: "user", content: "Find Vast.ai GPU offers with at least 24GB VRAM sorted by lowest hourly price" }],
});

while (response.output.some((o) => o.type === "function_call")) {
  const outputs = await composio.provider.handleToolCalls(session, response.output);
  response = await client.responses.create({
    model: "gpt-5.6-sol",
    tools,
    previous_response_id: response.id,
    input: outputs,
  });
}

console.log(response.output_text);
```

### Path 2: MCP Server Setup

#### Path 2, Step 1: Install Composio

Install the Composio SDK and your agent framework
```python
pip install composio claude-agent-sdk
```

```typescript
npm install @composio/core ai @ai-sdk/mcp @ai-sdk/openai
```

#### Path 2, Step 2: Create a session with MCP enabled

Create a session scoped to Vast.ai and read its MCP URL and headers
```python
from composio import Composio

composio = Composio()
session = composio.create(user_id="your-user-id", toolkits=["vast_ai"], mcp=True)
```

```typescript
import { Composio } from "@composio/core";

const composio = new Composio();
const { mcp } = await composio.create("your-user-id", {
  toolkits: ["vast_ai"],
  mcp: true,
});
```

#### Path 2, Step 3: Connect your agent to the MCP server

Pass the session's MCP URL and headers to your agent and run a Vast.ai request
```python
import asyncio
from claude_agent_sdk import ClaudeSDKClient, ClaudeAgentOptions, AssistantMessage, TextBlock

options = ClaudeAgentOptions(
    mcp_servers={
        "composio": {
            "type": "http",
            "url": session.mcp.url,
            "headers": session.mcp.headers,
        }
    },
    system_prompt="You are a helpful assistant with access to Vast.ai tools.",
    tools=[],
    allowed_tools=["mcp__composio__*"],
)

async def main():
    async with ClaudeSDKClient(options=options) as client:
        await client.query("Find Vast.ai GPU offers with at least 24GB VRAM sorted by lowest hourly price")
        async for message in client.receive_response():
            if isinstance(message, AssistantMessage):
                for block in message.content:
                    if isinstance(block, TextBlock):
                        print(block.text)

asyncio.run(main())
```

```typescript
import { createMCPClient } from "@ai-sdk/mcp";
import { openai } from "@ai-sdk/openai";
import { generateText, stepCountIs } from "ai";

const client = await createMCPClient({
  transport: { type: "http", url: mcp.url, headers: mcp.headers },
});

const { text } = await generateText({
  model: openai("gpt-5.6-sol"),
  tools: await client.tools(),
  prompt: "Find Vast.ai GPU offers with at least 24GB VRAM sorted by lowest hourly price",
  stopWhen: stepCountIs(10),
});

console.log(text);
await client.close();
```

## Why Use Composio?

### 1. AI Native Vast.ai Integration

- Supports both Vast.ai MCP and direct API based integrations
- Structured, LLM-friendly schemas for reliable GPU offer, storage volume, and launch template queries
- Lets agents reason over Vast.ai infrastructure options without you writing custom API wrappers

### 2. Managed Auth

- Secure API key handling for Vast.ai, so keys don't live inside prompts or agent code
- Use auth_configs.create() and connected_accounts.link() to configure and connect user credentials cleanly
- Per user and per environment credentials instead of hard-coded Vast.ai API keys

### 3. Agent Optimized Design

- Tools are tuned for AI agents, so they can search offers and templates with fewer broken calls
- Comprehensive execution logs show which Vast.ai queries ran, when they ran, and on whose behalf
- Need MCP? Use mcp.create() to expose Vast.ai tools to agents like Claude, Cursor, and ChatGPT-style clients

### 4. Enterprise Grade Security

- Fine-grained RBAC so you control which agents and users can access Vast.ai
- Scoped, least privilege access to Vast.ai compute and storage search workflows
- Full audit trail of agent actions to support review, debugging, and compliance

## Use Vast.ai with any AI Agent Framework

Choose a framework you want to connect Vast.ai with:

None listed.

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## Frequently Asked Questions

### Do I need my own developer credentials to use Vast.ai with Composio?

Yes, Vast.ai requires you to configure your own API key. Once set up, Composio handles secure credential storage and API request handling for you.

### Can I use multiple toolkits together?

Yes! Composio's Tool Router enables agents to use multiple toolkits. [Learn more](https://docs.composio.dev/tool-router/overview).

### Is Composio secure?

Composio is SOC 2 and ISO 27001 compliant with all data encrypted in transit and at rest. [Learn more](https://trust.composio.dev).

### What if the API changes?

Composio maintains and updates all toolkit integrations automatically, so your agents always work with the latest API versions.

---
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