How to integrate Ntfy MCP with Antigravity

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How to integrate Ntfy 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 Ntfy account to Antigravity IDE via Composio Connect, so it can send push notification for build failures, notify me of high-priority alerts, broadcast message to all devices, and more without ever putting your account credentials at risk.

Also integrate Ntfy 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 Ntfy 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 Ntfy account

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

For example, ask it to:

  • "Send push notification for build failures"
  • "Notify me of high-priority alerts"
  • "Broadcast message to all devices"

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

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

Supported Tools & Triggers

Tools
Create NTFY AccountTool to register a new user account on ntfy.
Create Web Push SubscriptionTool to register a web push subscription for browser notifications.
Delete Web Push SubscriptionTool to unregister a web push subscription from the ntfy server.
Fetch Cached MessagesTool to fetch cached messages from a ntfy topic.
Fetch Latest Message from TopicTool to fetch the most recent message from a topic's cache.
Fetch Scheduled MessagesTool to fetch messages scheduled for later delivery from a topic.
Get Account InformationTool to retrieve account data for authenticated user or anonymous user.
Get Server StatisticsTool to retrieve server statistics including message counts and publishing rates.
Get Service TiersTool to list all available ntfy service tiers with their limits and features.
Get File Attachment MetadataTool to get file attachment metadata from a message without downloading the file content.
Check NTFY Service HealthTool to check the health status of the ntfy service.
Poll Messages from TopicTool to poll for messages from an ntfy topic without maintaining a long-standing connection.
Publish Message as JSON to NTFYTool to publish messages as JSON to ntfy.
Publish Message to TopicTool to publish a message to a ntfy topic.
Publish Message to Topic (PUT)Tool to publish a message to a topic using PUT method.
Publish Message via GETTool to publish messages to ntfy via GET request with URL parameters.
Send Message via WebhookTool to send messages via webhook endpoint using simple GET request.
Subscribe to NTFY Topic with FiltersTool to subscribe to a ntfy topic with filters based on message fields (id, message, title, priority, tags).
Subscribe to Topic (JSON Stream)Tool to subscribe to a ntfy topic and receive messages as JSON stream.
Subscribe to Multiple NTFY TopicsTool to subscribe to multiple ntfy topics simultaneously using comma-separated topic list.
Subscribe to Topic (Raw Stream)Tool to subscribe to a topic and receive message bodies as raw text stream.
Trigger NTFY WebhookTool to trigger a webhook to publish a message to an ntfy topic via simple HTTP GET request.

Conclusion

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

How to build Ntfy MCP Agent with another framework

FAQ

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

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

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

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

Used by agents from

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Context
Letta
glean
HubSpot
Agent.ai
Altera
DataStax
Entelligence
Rolai
Context
Letta
glean
HubSpot
Agent.ai
Altera
DataStax
Entelligence
Rolai

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