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

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

developer.att.com

Built by Vinkius GDPR ToolsGrátis

CPaaS Messaging -- Send SMS/MMS, manage shortcodes, track delivery status, and run bulk campaigns via AT&T Messaging API.

Vinkius AI Gateway suporta streamable HTTP e SSE.

Funciona com todos os agentes de IA que você já usa

…e qualquer cliente compatível com MCP

AT&T Messaging MCP Server: veja o seu AI Agent em ação

AI Agent→Vinkius→AT&T Messaging

You

Vinkius AI Gateway

GDPR·High Security·Kill Switch·Ultra-Low Latency·Plug and Play

Capacidades integradas (9)

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

O que esse conector desbloqueia

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

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

How it works

1. Subscribe to this server
2. Enter your AT&T Messaging API Key and API Secret
3. Start sending messages and managing campaigns from Claude, Cursor, or any MCP-compatible client

No more bouncing between the AT&T Messaging dashboard and your CRM. Your AI agent becomes your messaging command center.

Who is this for?

Marketing Teams -- launch SMS/MMS campaigns, monitor keyword engagement, and manage shortcodes for different brands
DevOps Engineers -- trigger mass alert broadcasts, track delivery rates, and debug failed sends
Customer Support -- review inbound customer messages, process STOP/START commands, and send order updates
Compliance Officers -- audit full message history with timestamps, directions, and content snippets

Perguntas frequentes

Dê aos seus agentes de IA o poder do AT&T Messaging

Acesse o AT&T Messaging e mais de 2.000 servidores MCP — prontos para seus agentes usarem, agora mesmo. Sem código cola. Sem integrações customizadas. Apenas plugue o Vinkius AI Gateway e deixe seus agentes trabalharem.

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