How to integrate V0 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 V0 MCP integration, you can draft, triage, summarise emails, and much more, all without leaving the terminal or the app, whichever you prefer.

Also integrate V0 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 V0 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 V0 MCP server, and what's possible with it?

The V0 MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your V0 account. It provides structured and secure access to your V0 projects and chat-powered workflows, so your agent can perform actions like generating code, managing web projects, retrieving chat histories, and facilitating AI-driven conversations on your behalf.

  • AI-powered chat completions: Instantly generate conversational replies or code suggestions using V0's advanced chat models tailored for web development workflows.
  • Retrieve and manage chat sessions: List and access your previous AI-assisted chat threads, including support for filtering favorites and paginated results.
  • Project discovery and management: Fetch a complete list of your web development projects, making it easy for your agent to interact with or summarize project data.
  • Integrated development automation: Seamlessly combine chat capabilities and project management to automate code generation, troubleshooting, or project setup tasks.

Supported Tools & Triggers

Tools
Assign Chat To ProjectTool to assign a chat to a project.
V0 Chat CompletionsTool to generate a chat model response given a list of messages.
Create WebhookTool to create a new webhook subscription for receiving event notifications.
Create V0 ProjectTool to create a new v0 project container for chats and code generation.
Create Project Environment VariablesTool to create new environment variables for a v0 project.
Create Vercel ProjectTool to link a Vercel project to an existing v0 project.
Delete ChatTool to permanently delete a specific chat by ID.
Delete DeploymentTool to delete a deployment by ID from Vercel.
Delete HookTool to delete a webhook by its ID.
Delete Project Environment VariablesTool to delete multiple environment variables from a project by their IDs.
Delete V0 ProjectTool to permanently delete a v0 project by its ID.
Deploy ProjectTool to deploy a specific v0 chat version to Vercel.
Download Chat VersionTool to download all files for a specific chat version as a zip or tarball archive.
Export Project CodeTool to export a deployable snapshot of a v0 chat version by retrieving all files (including default/deployment files).
Favorite ChatTool to mark a chat as favorite or remove the favorite status.
Find ChatsTool to retrieve a list of chats.
Find ProjectsTool to retrieve a list of projects associated with the authenticated user.
Find Vercel ProjectsTool to retrieve a list of Vercel projects linked to the user's v0 workspace.
Fork ChatTool to create a fork (copy) of an existing chat.
Get ChatTool to retrieve the full details of a specific chat using its chatId.
Get Chat ProjectTool to retrieve the v0 project associated with a given chat.
Get Deployment ErrorsTool to retrieve errors for a specific deployment.
Get Deployment LogsTool to retrieve logs for a specific deployment.
Get HookTool to retrieve detailed information about a specific webhook by its ID.
Get Chat MessageTool to retrieve detailed information about a specific message within a chat.
Get Project by IDTool to retrieve the details of a specific v0 project by its ID, including associated chats and metadata.
Get Project Environment VariableTool to retrieve a specific environment variable for a given project by its ID, including its value.
Get Rate LimitsTool to retrieve the current rate limits for the authenticated user.
Get Usage ReportTool to retrieve detailed usage events including costs, models used, and metadata.
Get UserTool to retrieve the currently authenticated user's information.
Get User BillingTool to fetch billing usage and quota information for the authenticated user.
Get User PlanTool to retrieve the authenticated user's subscription plan details including billing cycle and balance.
Get User ScopesTool to retrieve all accessible scopes for the authenticated user, such as personal workspaces or shared teams.
Initialize ChatTool to initialize a new chat from source content such as files, repositories, registries, zip archives, or templates.
List Chat VersionsTool to retrieve all versions (iterations) for a specific chat, ordered by creation date (newest first).
List DeploymentsTool to retrieve a list of deployments for a given project, chat, and version.
List HooksTool to retrieve all webhooks tied to chat events or deployments.
List MessagesTool to retrieve all messages within a specific chat.
List Project Environment VariablesTool to retrieve all environment variables for a project with optional decryption.
Update ChatTool to update metadata of an existing v0 chat.
Update Chat Version FilesTool to update source files of a specific chat version.
Update V0 WebhookTool to update the configuration of an existing webhook, including its name, event subscriptions, or target URL.
Update V0 ProjectTool to update the metadata of an existing v0 project using its projectId.
Update Project Environment VariablesTool to update environment variables for a v0 project.

Conclusion

You've successfully integrated V0 with Codex using Composio's MCP server. Now you can interact with V0 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 V0 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 V0 operations
  • Explore cross-app workflows by connecting more toolkits
  • Build automation scripts that leverage Codex's AI capabilities

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FAQ

What are the differences in Tool Router MCP and V0 MCP?

With a standalone V0 MCP server, the agents and LLMs can only access a fixed set of V0 tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from V0 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 V0 tools.

Can I manage the permissions and scopes for V0 while using Tool Router?

Yes, absolutely. You can configure which V0 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 V0 data and credentials are handled as safely as possible.

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