How to use the Android MCP SMS Server in OpenClaw

This guide explains how to connect the Ozeki Android SMS Gateway MCP server to OpenClaw, enabling the AI assistant to send SMS messages directly from your Android phone. By following this tutorial, you will learn how to install the Ozeki Android SMS Gateway app, enable its built-in MCP server, register the MCP endpoint in OpenClaw, and verify that everything is working by sending a test message.

Solution: How to send SMS from OpenClaw

OpenClaw is connected to the Ozeki Android SMS MCP Server through the MCP protocol, where OpenClaw is the MCP client and the Android phone is the MCP server. The Android phone is connected to the SMS service provider through a wireless mobile network connection. When an SMS is sent, it first travels from OpenClaw to the Android phone through the MCP protocol, and the Android phone forwards it to the SMS service provider, which delivers it to the recipient's mobile phone.

What is OpenClaw?

OpenClaw is an open-source, autonomous AI agent designed to run locally on your computer, managing tasks by interacting directly with applications, files, and messaging apps like Telegram or Discord. Launched in late 2025, it acts as a personal AI assistant with persistent memory, capable of executing shell commands, browsing the web, and running automated "skills".

What is an Android SMS MCP Server?

An Android SMS MCP Server is a Model Context Protocol server that runs directly on an Android smartphone and exposes SMS functionality — such as sending text messages and querying SIM subscriptions — as structured tools that any MCP-compatible AI client can call. Once installed and configured, the AI client can send real SMS messages through the phone's SIM card to any phone number, with a single tool call.

Connections

OpenClaw is connected to the Android Mobile through the MCP protocol, where OpenClaw is the MCP Client and the Android Mobile is the MCP Server. The Android Mobile is connected to the mobile network through a wireless connection. When an SMS is sent, it first travels from OpenClaw to the Android Mobile through the MCP protocol, and the Android Mobile forwards it to the mobile network.

Download Ozeki Android SMS Gateway

To use this solution you need to install the Android app on your Android phone.

Download the android app: Android SMS Gateway

https://android-sms-gateway.com/p_51-download-android-sms-gateway.html

Steps to follow

You will need OpenClaw installed on your system. If you have not set it up yet, follow our OpenClaw installation guide.

Install Ozeki Android SMS Gateway
Enable MCP SMS Server
OpenClaw SMS MCP Server Config
Add the SMS MCP Server config to OpenClaw
Start OpenClaw and send a test SMS
Check the SMS in the SMS Gateway logs

Step 1 - Install Ozeki Android SMS Gateway

For a full tutorial on installing the Ozeki Android SMS Gateway, check out our How to install Android SMS Client and Enable Ozeki SMS Client permissions guides.

Before you can use the MCP SMS Server, you need to install the Ozeki SMS Client on your Android device. The app will serve as the local SMS gateway that OpenClaw connects to over your Wi-Fi network. Make sure both devices are on the same local network, as this is required for the HTTP connection to work.

Step 2 - Enable MCP SMS Server

For a full tutorial on enabling the MCP server in the Android app, check out our Android MCP SMS Server configuration guide.

Open the Ozeki SMS Client app on your Android device and tap the MCP tab in the bottom navigation bar. Tap the toggle switch to start the MCP server and grant any permission requests that appear, including access to SMS messages. The toggle will switch from "Stopped" to "Running" and the API endpoint URL will appear below. Copy this URL, as you will need it when configuring OpenClaw in the next step.

Step 3 - OpenClaw SMS MCP Server Config

# Configuration file location:
C:\Users\%USERPROFILE%\.openclaw\openclaw.json

# Add the following block inside the "mcp" property in openclaw.json
# Replace {address} with your Ozeki Android SMS Gateway address
"mcp": {
  "servers": {
    "Ozeki Android SMS MCP": {
      "url": "http://{address}:9531/mcp",
      "transport": "streamable-http"
    }
  }
},

Example prompt

Send an SMS to +36301234567, the message should be "Hello from OpenClaw".

Step 4 - Add the SMS MCP Server config to OpenClaw

The following video shows how to add the Android SMS MCP server to OpenClaw step-by-step.

Navigate to the OpenClaw configuration directory at C:\Users\%USERPROFILE%\.openclaw\ using File Explorer. You can open this folder quickly by typing %USERPROFILE%\.openclaw directly into the File Explorer address bar and pressing Enter (Figure 1).

Navigate to OpenClaw config directory — Figure 1 - Navigate to the OpenClaw configuration directory

Open the openclaw.json file in a text editor such as Notepad or Visual Studio Code. This file stores all OpenClaw configuration, including any MCP servers (Figure 2).

Open openclaw.json in text editor — Figure 2 - Open the openclaw.json file in a text editor

Locate the mcp property in the file. If it does not exist yet, add it as a new block. Then insert the Android SMS MCP server entry as shown below. Replace {address} with the IP address shown in the Ozeki SMS Client (Figure 3).

"mcp": {
  "servers": {
    "Ozeki Android SMS MCP": {
      "url": "http://{address}:9531/mcp",
      "transport": "streamable-http"
    }
  }
},

Add Ozeki SMS MCP server to config — Figure 3 - Add the Android SMS MCP server entry to the config

Step 5 - Start OpenClaw and send a test SMS

The following video shows how to send an SMS message from OpenClaw using the Ozeki Android SMS MCP server step-by-step.

Open a new terminal window by searching for Terminal in the Start menu (Figure 4).

Open a terminal — Figure 4 - Open a new terminal window

Launch the OpenClaw dashboard by running the following command in the terminal. OpenClaw will start and automatically connect to all MCP servers listed in the configuration file (Figure 5).

Run OpenClaw dashboard command — Figure 5 - Run the OpenClaw dashboard command in the terminal

To send an SMS, type a plain language instruction in the prompt. For example, ask to send a message to a specific phone number. OpenClaw will call the Send SMS tool and process the request (Figure 6).

Send an SMS to +36301234567, the message should be "Hello from OpenClaw".

Send a prompt to the AI — Figure 6 - Send a plain language SMS prompt to OpenClaw

OpenClaw will display the AI response along with the tool use details in the dashboard. A successful response confirms that the message has been passed to the Android gateway and queued for delivery (Figure 7).

AI response with tool use — Figure 7 - AI response showing the Send SMS tool result

Step 6 - Check the SMS in the SMS Gateway logs

The following video shows how to check the gateway logs in the Ozeki SMS Client app step-by-step. This allows you to confirm that the SMS request from OpenClaw was received and processed successfully by the Android gateway.

Open the Ozeki SMS Client app on your Android device and navigate to the Settings tab in the bottom navigation bar to access the application settings. Tap the Log option to view the request and response history (Figure 8).

Figure 8 - Open the gateway settings and tap Log

Select the MCP tab to show only MCP-related activity. Here you will see the incoming tool call requests from OpenClaw and the responses sent back, allowing you to confirm that the SMS was dispatched successfully (Figure 9).

Figure 9 - Select the MCP tab to view the MCP activity logs

Summary

You have successfully configured the Ozeki Android SMS Gateway MCP server with OpenClaw. Your Android device is now acting as a local SMS gateway that it can communicate with over your local network, enabling text messages to be sent to any phone number using plain language prompts. All SMS traffic is routed through your Android device's mobile connection, with no cloud messaging API or third-party service required — everything runs locally on your own hardware.