How to integrate V0 MCP with Antigravity

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How to integrate V0 MCP with Antigravity

Antigravity IDE is Google's agentic IDE, built on a VS Code-style editor and powered by models like Gemini 3.5 Flash, Gemini 3.1 Pro, Opus 4.6, and more. It treats the AI agent as a first-class teammate, planning, coding, and validating work through an Agent Manager dashboard with deep browser connectivity.

In this guide, I will explain the easiest and most secure way to connect your V0 account to Antigravity IDE via Composio Connect, so it can generate React code for a login page, list all your active V0 projects, summarize our last five chat sessions, and more without ever putting your account credentials at risk.

Also integrate V0 with

Why use Composio?

Composio provides:

  • Access to 1,000+ managed apps from a single MCP endpoint. This makes it convenient for agents to run cross-app workflows.
  • Programmatic tool calling. Allows LLMs to write code in a remote workbench to handle complex tool chaining. Reduces to-and-fro with LLMs for frequent tool calling.
  • Large tool response handling outside the LLM context. This minimizes context bloat from large tool responses.
  • Dynamic just-in-time access to thousands of tools across hundreds of apps. Composio loads the tools your agent needs, so LLMs are not overwhelmed by tools they do not need.

Connect V0 to Antigravity

Antigravity does not ship with one-click custom MCP install links yet, so configuration goes through the IDE's raw config file. The process takes under a minute.

1. Open the MCP Config

Go to Antigravity Settings, open the Customizations tab, then click Open MCP Config to open mcp_config.json in the editor.

Antigravity Customizations settings with Open MCP Config button

2. Get your API key

Go to the Composio Dashboard and copy your API key.

Composio Dashboard showing where to get the API key

3. Add Composio to mcp_config.json

Paste the following configuration into the file:

bash
{
  "mcpServers": {
    "remote-composio": {
      "serverUrl": "https://connect.composio.dev/mcp",
      "headers": {
        "x-consumer-api-key": "your-composio-api-key"
      }
    }
  }
}

Note: Antigravity uses serverUrl, not url, for remote HTTP-based MCP servers. This differs from the url key used in Cursor and VS Code configs.

Save the file and click refresh in the Installed MCP Servers section.

Antigravity showing Composio tools after MCP setup

Connect your V0 account

Back in the Antigravity agent panel, ask the agent to connect to V0 or give it any V0-related task.

For example, ask it to:

  • "Generate React code for a login page"
  • "List all your active V0 projects"
  • "Summarize our last five chat sessions"

It will prompt you to authenticate and authorize access to V0.

That is it. Composio tools are now available in Antigravity, and your V0 account is ready to use.

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 have successfully connected V0 to Antigravity using Composio Connect. Your agent can now use V0 securely without exposing credentials in prompts or local scripts.

How to build V0 MCP Agent with another framework

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 Antigravity?

Yes, you can. Antigravity 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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