How to integrate Conversion tools MCP with Codex

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

Conversion tools logoConversion tools
Api Key

Conversion Tools is an online service for converting documents between formats such as PDF, Word, Excel, XML, and CSV. It lets you automate complex document workflows with just a few clicks.

11 Tools

Introduction

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

Also integrate Conversion tools with

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 1000+ 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 Conversion tools MCP in Codex

Run the setup command

Run this command in your terminal to add the Composio MCP server to Codex.

Terminal

It will initiate the authentication in a browser window, authorize Codex to access your Composio account.

Composio authentication page

(Optional) Authenticate with OAuth

To authenticate manually, run the login command to open a browser window and authorize Codex to access your Composio account.

bash
codex mcp login composio

Verify the connection

Run codex mcp list to confirm Composio appears as a registered MCP server.

bash
codex mcp list

Codex App

Codex App follows the same approach as VS Code.

  1. Click ⚙️ on the bottom left → MCP Servers → + Add servers → Streamable HTTP:
  2. Fill the header and Key fields with { "x-consumer-api-key" = "ck_*******" }.
  3. The Key is the Composio API key, that you can find on dashboard.composio.dev
  4. Click on Authenticate and authorize Codex to your Composio account and you're all set.
Codex App MCP setup
  1. Restart and verify if it's there in .codex/config.toml
bash
[mcp_servers.composio]
url = "https://connect.composio.dev/mcp"
http_headers = { "x-consumer-api-key" = "ck_*******" }

What is the Conversion tools MCP server, and what's possible with it?

The Conversion tools MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Conversion tools account. It provides structured and secure access to a wide range of file and document conversion utilities, so your agent can convert documents, extract data, generate snapshots, and automate file handling between multiple formats on your behalf.

  • Seamless document format conversion: Effortlessly have your agent convert Excel, Word, Markdown, OXPS, or JPG files to formats like CSV, HTML, PDF, text, or JSON.
  • Website snapshot creation: Ask your agent to capture entire web pages as PDF documents or PNG images, ready to download or share.
  • Automated file upload and processing: Let your agent upload local files, obtain conversion-ready file IDs, and initiate multi-step conversion workflows.
  • AI-powered data extraction: Use AI tools to transform images (JPG) into structured JSON, streamlining data entry and analysis tasks.
  • Easy retrieval of conversion results: Direct your agent to track conversion tasks and download the final output files once processing is complete.

Conclusion

You've successfully integrated Conversion tools with Codex using Composio's MCP server. Now you can interact with Conversion tools 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 Conversion tools operations
  • Managed authentication through Composio
  • Access to 20,000+ tools across 1000+ apps for cross-app workflows
  • CodeAct workbench for complex tool chaining

Next steps:

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

Supported Tools

Every Conversion tools action and event your agent gets out of the box.

Convert Excel to HTML

Convert an Excel (.

Convert Word to Text

Convert Word documents (.

Create Conversion Task

Tool to create a new conversion task.

Download Converted File

Download a converted file from the Conversion Tools API using its file ID.

Get Auth Info

Tool to get information about the authenticated user including email address.

Get Conversion Config

Tool to get available conversion types and their configuration.

Get File Info

Tool to get metadata about a file including size, name, and preview (for text files).

Get Task Status

Tool to get the status of a conversion task.

List Conversion Tasks

Get all tasks for the authenticated user (up to 50 most recent tasks).

Update Task Retention

Tool to update the retention mode for a task.

Upload File

Upload a file to the ConversionTools API for subsequent conversion operations.

FAQ

Frequently asked questions

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

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 Conversion tools tools.

Yes, absolutely. You can configure which Conversion tools 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 Conversion tools data and credentials are handled as safely as possible.

Start with Conversion tools.It takes 30 seconds.

Managed auth, hosted MCP servers, and every Conversion tools tool your agent needs.Free to start.

Start building