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 AutoGen 9 tools — connect in under 2 minutes

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

microsoft.github.io/autogen/docs/tools/mcp-tools

Built by Vinkius GDPR 9 Tools Framework

Microsoft AutoGen enables multi-agent conversations where agents negotiate, delegate, and execute tasks collaboratively. Add AT&T Messaging as an MCP tool provider through Vinkius and every agent in the group can access live data and take action.

Get MCP Server for AI Agents

ASK AI ABOUT THIS MCP SERVER

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Vinkius supports streamable HTTP and SSE.

python

import asyncio
from autogen_agentchat.agents import AssistantAgent
from autogen_ext.tools.mcp import McpWorkbench

async def main():
    # Your Vinkius token. get it at cloud.vinkius.com
    async with McpWorkbench(
        server_params={"url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"},
        transport="streamable_http",
    ) as workbench:
        tools = await workbench.list_tools()
        agent = AssistantAgent(
            name="att_messaging_agent",
            tools=tools,
            system_message=(
                "You help users with AT&T Messaging. "
                "9 tools available."
            ),
        )
        print(f"Agent ready with {len(tools)} tools")

asyncio.run(main())

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* 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.

AutoGen enables multi-agent conversations where agents negotiate, delegate, and collaboratively use AT&T Messaging tools. Connect 9 tools through Vinkius and assign role-based access. a data analyst queries while a reviewer validates, with optional human-in-the-loop approval for sensitive operations.

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 AutoGen 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 AutoGen via MCP

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

Install AutoGen

Run pip install "autogen-ext[mcp]"

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token

Integrate into workflow

Use the agent in your AutoGen multi-agent orchestration

Explore tools

The workbench discovers 9 tools from AT&T Messaging automatically

Why Use AutoGen with the AT&T Messaging MCP Server

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

Multi-agent conversations: multiple AutoGen agents discuss, delegate, and collaboratively use AT&T Messaging tools to solve complex tasks

Role-based architecture lets you assign AT&T Messaging tool access to specific agents. a data analyst queries while a reviewer validates

Human-in-the-loop support: agents can pause for human approval before executing sensitive AT&T Messaging tool calls

Code execution sandbox: AutoGen agents can write and run code that processes AT&T Messaging tool responses in an isolated environment

AT&T Messaging + AutoGen Use Cases

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

Collaborative analysis: one agent queries AT&T Messaging while another validates results and a third generates the final report

Automated review pipelines: a researcher agent fetches data from AT&T Messaging, a critic agent evaluates quality, and a writer produces the output

Interactive planning: agents negotiate task allocation using AT&T Messaging data to make informed decisions about resource distribution

Code generation with live data: an AutoGen coder agent writes scripts that process AT&T Messaging responses in a sandboxed execution environment

AT&T Messaging MCP Tools for AutoGen (9)

These 9 tools become available when you connect AT&T Messaging to AutoGen 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 AutoGen

Ready-to-use prompts you can give your AutoGen 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 AutoGen

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

McpWorkbench not found

Install: pip install "autogen-ext[mcp]"

AT&T Messaging + AutoGen FAQ

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

How does AutoGen connect to MCP servers?

Create an MCP tool adapter and assign it to one or more agents in the group chat. AutoGen agents can then call AT&T Messaging tools during their conversation turns.

Can different agents have different MCP tool access?

Yes. AutoGen's role-based architecture lets you assign specific MCP tools to specific agents, so a querying agent has different capabilities than a reviewing agent.