How to integrate Snowflake Basic MCP with Codex

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Introduction

Codex is one of the most popular coding harnesses out there. And MCP makes the experience even better. With Snowflake Basic MCP integration, you can draft, triage, summarise emails, and much more, all without leaving the terminal or app, whichever you prefer.

Composio removes the Authentication handling completely from you. We handle the entire integration lifecycle, and all you need to do is just copy the URL below, authenticate inside Codex, and start using it.

Why use Composio?

Apart from a managed and hosted MCP server, you will get:

  • CodeAct: A dedicated workbench that allows GPT to write its code to handle complex tool chaining. Reduces to-and-fro with LLMs for frequent tool calling.
  • Large tool responses: Handle them to minimise context rot.
  • Dynamic just-in-time access to 20,000 tools across 870+ other Apps for cross-app workflows. It loads the tools you need, so GPTs aren't overwhelmed by tools you don't need.

How to install Snowflake Basic MCP in Codex

Codex CLI

Run the command in your terminal.

Terminal

This will auto-redirect you to the Rube authentication page.

Rube authentication redirect page

Once you're authenticated, you will be able to access the tools.

Verify the installation by running:

codex mcp list

If you otherwise prefer to use config.toml, add the following URL to it. You can get the bearer token from rube.app → Use Rube → MCP URL → Generate token

[projects."/home/user/composio"]
trust_level = "untrusted"

[mcp_servers.rube]
bearer_token_env_var = "your bearer token"
enabled = true
url = "https://rube.app/mcp"

Codex in VS Code

If you have installed Codex in VS Code.

Then: ⚙️ → MCP Settings → + Add servers → Streamable HTTP:

Add the Rube MCP URL: https://rube.app/mcp and the bearer token.

VS Code MCP Settings

To verify, click on the Open config.toml

Open config toml in Codex

Make sure it's there:

[mcp_servers.composio_rube]
bearer_token_env_var = "your bearer token"
enabled = true
url = "https://rube.app/mcp"

Codex App

Codex App follows the same approach as VS Code.

  1. Click ⚙️ on the bottom left → MCP Servers → + Add servers → Streamable HTTP:
Codex App MCP Settings
  1. Restart and verify if it's there in .codex/config.toml
[mcp_servers.composio_rube]
bearer_token_env_var = "your bearer token"
enabled = true
url = "https://rube.app/mcp"
  1. Save, restart the extension, and start working.

What is the Snowflake Basic MCP server, and what's possible with it?

The Snowflake Basic MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Snowflake Basic account. It provides structured and secure access so your agent can perform Snowflake Basic operations on your behalf.

Supported Tools & Triggers

Tools
Describe tableRetrieves detailed information for each column (including name, data type, kind, nullability, default value, and key status) in a specified snowflake table.
Explore ColumnsRetrieves a sample of distinct values for specified columns from a snowflake table.
Run QueryExecutes the given sql query in snowflake within the specified database and schema (which must exist and be accessible), automatically setting context first.
Show databasesRetrieves a list of all databases available in the snowflake account.
Show schemasRetrieves a list of all schemas within a specified snowflake database.
Show TablesRetrieves a list of tables, including their row counts and sizes in bytes, from a specified schema within a snowflake database.

Conclusion

You've successfully integrated Snowflake Basic with Codex using Composio's Rube MCP server. Now you can interact with Snowflake Basic directly from your terminal, VS Code, or the Codex App using natural language commands.

Key benefits of this setup:

  • Seamless integration across CLI, VS Code, and standalone app
  • Natural language commands for Snowflake Basic operations
  • Managed authentication through Composio's Rube
  • Access to 20,000+ tools across 870+ apps for cross-app workflows
  • CodeAct workbench for complex tool chaining

Next steps:

  • Try asking Codex to perform various Snowflake Basic operations
  • Explore cross-app workflows by connecting more toolkits
  • Build automation scripts that leverage Codex's AI capabilities

How to build Snowflake Basic MCP Agent with another framework

OpenAI Agents SDK

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Vercel AI SDK

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Use Snowflake Basic MCP with Vercel AI SDK

Mastra AI

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Use Snowflake Basic MCP with Mastra AI

LlamaIndex

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Use Snowflake Basic MCP with LlamaIndex

CrewAI

CrewAI

Use Snowflake Basic MCP with CrewAI

Claude Code

Claude Code

Use Snowflake Basic MCP with Claude Code

FAQ

What are the differences in Tool Router MCP and Snowflake Basic MCP?

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

Can I use Tool Router MCP with Codex?

Yes, you can. Codex 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 Snowflake Basic tools.

Can I manage the permissions and scopes for Snowflake Basic while using Tool Router?

Yes, absolutely. You can configure which Snowflake Basic 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.

How safe is my data with Composio Tool Router?

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 Snowflake Basic data and credentials are handled as safely as possible.

Used by agents from

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