How to integrate Transloadit MCP with Codex

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

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Api Key

Transloadit is a cloud file processing platform for uploads, media conversion, and delivery. Use it to automate image, audio, video, and document workflows at scale.

6 Tools

Introduction

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

Also integrate Transloadit 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 Transloadit 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 Transloadit MCP server, and what's possible with it?

The Transloadit MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Transloadit account. It provides structured and secure access to your file-processing workflows, so your agent can start processing jobs, monitor progress, review results, cancel active work, and retry failed jobs on your behalf.

  • Start file-processing workflows: Have your agent launch a workflow from configured processing steps or an existing template, with local files included when needed.
  • Monitor processing progress: Let the agent check a workflow’s latest state, uploaded files, warnings, and processing results.
  • Find previous workflows: Instruct your agent to list recent workflows and narrow them by state, date range, or keywords.
  • Cancel active processing: Direct your agent to stop a running workflow and any file upload still in progress.
  • Recover jobs and resend notifications: Have your agent retry a crashed workflow while its input files remain available, or resend the result notification for completed work.

Conclusion

You've successfully integrated Transloadit with Codex using Composio's MCP server. Now you can interact with Transloadit 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 Transloadit 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 Transloadit operations
  • Explore cross-app workflows by connecting more toolkits
  • Build automation scripts that leverage Codex's AI capabilities
TOOLS

Supported Tools

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

Cancel Assembly

Cancel a running Assembly and any upload still in progress.

Create Assembly

Start a Transloadit file-processing Assembly from validated inline Steps or an existing Template, optionally uploading up to 10 local files with a 20 MiB aggregate direct-upload limit.

Get Assembly Status

Retrieve the latest state, uploads, warnings, and results for one Assembly.

List Assemblies

Return one page of Assemblies in descending creation order, optionally filtered by state, date range, or keywords.

Replay Assembly

Retry a crashed Assembly while its original input files remain recoverable, optionally reparsing its Template.

Replay Assembly Notification

Resend a completed Assembly's result notification to the notify_url configured on that Assembly.

FAQ

Frequently asked questions

With a standalone Transloadit MCP server, the agents and LLMs can only access a fixed set of Transloadit tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Transloadit 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 Transloadit tools.

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

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