What sender IDs can I use to send SMS messages?

You must use a registered AT&T shortcode or dedicated long code as the sender ID. Unregistered or random numbers will be rejected by the carrier. You can provision new shortcodes with keywords using the `create_shortcode` tool, or check your existing ones through the messaging dashboard. Each shortcode can be configured with multiple keyword auto-responses.

Can I send MMS with images and what formats are supported?

Yes. The `send_mms` tool accepts a publicly accessible media URL. Supported formats include JPEG, PNG, GIF for images, MP4 for video, and common audio formats. The media URL must be reachable by AT&T's servers -- local or private URLs will fail. Maximum file size limits apply per carrier specifications, typically up to 1MB for images and 3.5MB for video.

How do I handle customer opt-out requests like STOP?

AT&T Messaging automatically processes standard opt-out keywords (STOP, CANCEL, UNSUBSCRIBE, QUIT). When a customer sends one of these, they are added to your suppression list and will no longer receive messages from that shortcode. You can monitor inbound messages with `get_inbound_messages` to track opt-out activity and verify your keyword configuration with `get_keyword_responses`.

AT&T Messaging MCP Server for Google ADK 9 tools — connect in under 2 minutes

Name: AT&T Messaging
Availability: InStock
Author: Vinkius

google.github.io/adk-docs/tools/mcp-tools

Built by Vinkius GDPR 9 Tools SDK

Google Agent Development Kit (ADK) is Google's framework for building production AI agents. Add AT&T Messaging as an MCP tool provider through Vinkius and your ADK agents can call every tool with full schema introspection.

Get MCP Server for AI Agents

ASK AI ABOUT THIS MCP SERVER

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Vinkius supports streamable HTTP and SSE.

python

from google.adk.agents import Agent
from google.adk.tools.mcp_tool import McpToolset
from google.adk.tools.mcp_tool.mcp_session_manager import (
    StreamableHTTPConnectionParams,
)

# Your Vinkius token. get it at cloud.vinkius.com
mcp_tools = McpToolset(
    connection_params=StreamableHTTPConnectionParams(
        url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp",
    )
)

agent = Agent(
    model="gemini-2.5-pro",
    name="att_messaging_agent",
    instruction=(
        "You help users interact with AT&T Messaging "
        "using 9 available tools."
    ),
    tools=[mcp_tools],
)

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Stream every event to Splunk, Datadog, or your own webhook in real-time

* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure

About AT&T Messaging MCP Server

Connect your AT&T Messaging account to any AI agent and take full control of your SMS/MMS communication workflows through natural conversation.

Google ADK natively supports AT&T Messaging as an MCP tool provider. declare Vinkius Edge URL and the framework handles discovery, validation, and execution automatically. Combine 9 tools with Gemini's long-context reasoning for complex multi-tool workflows, with production-ready session management and evaluation built in.

What you can do

SMS Messaging -- Send transactional alerts, OTPs, and customer notifications from registered shortcodes with delivery tracking
MMS Messaging -- Attach images, videos, or audio to enrich marketing campaigns and visual alerts
Bulk Send -- Broadcast the same message to hundreds of recipients in one request with per-recipient status tracking
Delivery Status -- Check real-time delivery state (sent, delivered, failed, read) for any message by its ID
Message History -- Query outbound and inbound message logs for auditing, compliance reporting, or reply tracking
Inbound Messages -- Retrieve customer replies, opt-outs, and keyword-triggered auto-responses
Shortcode Management -- Provision new shortcodes with keywords for campaign routing, or decommission retired numbers
Keyword Responses -- Review configured auto-reply logic for shortcode keywords to verify opt-in/opt-out flows

The AT&T Messaging MCP Server exposes 9 tools through the Vinkius. Connect it to Google ADK in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.

How to Connect AT&T Messaging to Google ADK via MCP

Follow these steps to integrate the AT&T Messaging MCP Server with Google ADK.

Install Google ADK

Run pip install google-adk

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token

Create the agent

Save the code above and integrate into your ADK workflow

Explore tools

The agent will discover 9 tools from AT&T Messaging via MCP

Why Use Google ADK with the AT&T Messaging MCP Server

Google ADK provides unique advantages when paired with AT&T Messaging through the Model Context Protocol.

Google ADK natively supports MCP tool servers. declare a tool provider and the framework handles discovery, validation, and execution

Built on Gemini models, ADK provides long-context reasoning ideal for complex multi-tool workflows with AT&T Messaging

Production-ready features like session management, evaluation, and deployment come built-in. not bolted on

Seamless integration with Google Cloud services means you can combine AT&T Messaging tools with BigQuery, Vertex AI, and Cloud Functions

AT&T Messaging + Google ADK Use Cases

Practical scenarios where Google ADK combined with the AT&T Messaging MCP Server delivers measurable value.

Enterprise data agents: ADK agents query AT&T Messaging and cross-reference results with internal databases for comprehensive analysis

Multi-modal workflows: combine AT&T Messaging tool responses with Gemini's vision and language capabilities in a single agent

Automated compliance checks: schedule ADK agents to query AT&T Messaging regularly and flag policy violations or configuration drift

Internal tool platforms: build self-service agent platforms where teams connect their own MCP servers including AT&T Messaging

AT&T Messaging MCP Tools for Google ADK (9)

These 9 tools become available when you connect AT&T Messaging to Google ADK via MCP:

create_shortcode

Returns provisioning status and activation timeline. Use for new marketing campaigns or service alerts. Provision a new messaging shortcode with a keyword

delete_shortcode

Use when retiring a campaign or transferring numbers. Decommission a messaging shortcode

get_inbound_messages

Returns sender number, keyword matched, message body, and timestamp. Use for monitoring customer engagement or processing STOP/START commands. Retrieve recent inbound SMS/MMS from customers

get_keyword_responses

Use to review campaign logic or verify opt-in/opt-out flows. Get configured auto-replies for shortcode keywords

get_message_status

Use to track campaign performance or debug failed sends. Check delivery status of a specific message

list_messages

Returns timestamps, sender, recipient, and content snippets. Use for auditing, compliance reporting, or reply tracking. List outbound or inbound messaging history

send_bulk_sms

164 numbers. Returns job ID and per-recipient status array. Use for mass alerts, emergency broadcasts, or promotional campaigns. Send SMS to multiple recipients in one request

send_mms

Requires sender, recipient, message text, and media URL. Use for rich marketing campaigns, product images, or visual alerts. Send an MMS message with media attachment

send_sms

Requires sender ID, recipient E.164 number, and message body. Returns message ID and delivery status. Use this for transactional alerts, OTPs, or customer notifications. Send a single SMS message to a phone number

Example Prompts for AT&T Messaging in Google ADK

Ready-to-use prompts you can give your Google ADK agent to start working with AT&T Messaging immediately.

"Send an SMS from shortcode 12345 to +12125551234 saying 'Your order #48291 has shipped! Track it at example.com/track'."

"Send a bulk SMS to all these numbers: +12125551001, +12125551002, +12125551003 with the message 'Flash Sale: 50% off everything for the next 2 hours!'."

"Show me all inbound messages from the last 24 hours and check if anyone sent STOP."

Troubleshooting AT&T Messaging MCP Server with Google ADK

Common issues when connecting AT&T Messaging to Google ADK through the Vinkius, and how to resolve them.

McpToolset not found

Update: pip install --upgrade google-adk

AT&T Messaging + Google ADK FAQ

Common questions about integrating AT&T Messaging MCP Server with Google ADK.

How does Google ADK connect to MCP servers?

Import the MCP toolset class and pass the server URL. ADK discovers and registers all tools automatically, making them available to your agent's tool-use loop.

Can ADK agents use multiple MCP servers?

Yes. Declare multiple MCP tool providers in your agent configuration. ADK merges all tool schemas and the agent can call tools from any server in a single turn.

Which Gemini models work best with MCP tools?

Gemini 2.0 Flash and Pro models both support function calling required for MCP tools. Flash is recommended for latency-sensitive use cases, Pro for complex reasoning.