MCP Integration

Connect AI Assistants & Agents to RCS Messaging

Connect Claude, ChatGPT, Cursor, Manus and other AI assistants and agents directly to your SendRCS account. Send RCS and SMS messages, track campaigns, and manage conversations - all through natural language. No coding required.

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What is MCP?
How It Works
50 Tools
MCP vs API
Open Standard

What is MCP?

MCP (Model Context Protocol) is an open standard created by Anthropic that lets AI assistants and agents connect to external tools and services. Instead of writing code or using a REST API, you simply tell your AI assistant what you want in plain language - and it handles the rest.

With the SendRCS MCP integration, your AI assistant becomes a full RCS messaging operator. It can send messages, design rich cards, schedule campaigns - all from a single conversation. The same connection also powers autonomous AI agents that send RCS and SMS messages as part of a larger workflow.

MCP
Model Context Protocol
Open standard by Anthropic
Compatibility

Works With Your Favourite AI Tools

The SendRCS MCP server works with any MCP-compatible client.

Claude Desktop
OAuth & API key
Claude Code
CLI - API key or OAuth
Cursor
AI code editor
ChatGPT Desktop
MCP support
Manus
MCP configuration
Any MCP Client
Open standard
Examples

What Can You Do With It?

Just tell your AI assistant what you want in plain language.

Inventory + campaign in one prompt

“Check our Shopify stock. If the blue sneakers are overstocked, create a beautiful RCS carousel with a 20% discount and send it to our ‘VIP’ segment in Berlin.”

Weather-triggered promo

“Check the weather in Munich this weekend. If it’s sunny, send our outdoor event guests a rich card with Saturday’s lineup and a ‘Reserve a Spot’ button.”

Property listings blast

“Take our 3 newest listings from the CRM, build a carousel with photos and prices, and send it to contacts tagged ‘house hunting’ in Copenhagen.”

Webinar re-engagement

“Find everyone who attended last month’s webinar but hasn’t signed up for the next one. Send them a rich card with the new speaker lineup and an early-bird link.”

Support ticket rescue

“Check Zendesk for tickets open longer than 48 hours. Send each customer a personal apology with a ‘Callback’ button that dials our support line.”

Gym membership renewal

“Find members whose membership expires this month. Send each one a rich card with their visit stats this year and a 15% early-renewal offer.”

Restaurant tonight

“Check tonight’s reservation list. Send everyone dining after 7pm a carousel with our new seasonal menu and a ‘Pre-order Now’ button.”

See what got clicked

“Which buttons did people click in our ‘Black Friday’ campaign? Show me clicks and replies by contact, and flag the 20 most engaged so we can follow up.”

See who read it

“Pull the message log for this week’s newsletter and show me delivery and read status for every recipient — then list everyone who hasn’t read it yet.”

3 Steps

Get Started in Minutes

1

Connect

Add the SendRCS MCP server to your AI client. Just enter the URL and authenticate - no SDK, no code, no setup.

2

Talk

Tell your AI assistant what you want in plain language: “Send a rich card with our summer offer to all Danish customers.”

3

Done

The AI assistant sends the message, schedules the campaign, or pulls the analytics - and confirms the result.

Authentication

Two Ways to Connect

Recommended

OAuth 2.0

Log in securely through your browser - no API key copying needed. Your AI client handles everything automatically.

Setup

In your AI client’s MCP server settings, add a new Streamable HTTP server:

Name:  SendRCS
URL:   https://api.sendrcs.eu/api/mcp

How the OAuth flow works

  1. Your AI client opens a browser window to SendRCS login
  2. Enter your email and password
  3. Enter your 2FA verification code
  4. Done - the client receives a secure token (valid 30 days)

Security

  • PKCE (Proof Key for Code Exchange)
  • Two-factor authentication (2FA)
  • Tokens can be revoked any time
  • 30-day automatic expiration
For Developers

API Key

Connect using an API key from your SendRCS account. Simpler setup, ideal for automated systems.

Configuration

{
  "mcpServers": {
    "sendrcs": {
      "url": "https://api.sendrcs.eu/api/mcp",
      "headers": {
        "X-API-Key": "rk_your_api_key_here"
      }
    }
  }
}

API keys are found in the SendRCS app under Settings → API Keys.

Feature OAuth API Key
Setup Login via browser Copy-paste key
Expiration 30 days (auto) Never (manual revocation)
2FA support Yes No
Best for End users in AI clients Automated systems, developers
MCP Tools

50 Powerful Tools at Your Command

Everything you need to manage RCS messaging through your AI assistant.

Sending

3 tools
  • Send RCS Message - Send a single RCS message (text, rich card, carousel, media). Supports SMS fallback, scheduling, and merge fields
  • Send Batch RCS Messages - Send to up to 10,000 recipients. Messages are queued for background processing
  • Send SMS - Send or schedule a standalone SMS message without RCS. Supports timezone-aware scheduling. Reports segment count and encoding

Preview & Approval

2 tools
  • Preview RCS Message - Create a visual preview of your message before sending. Returns a preview link for review and a preview_id required by Send RCS Message
  • Preview SMS - Create a preview of an SMS message before sending. Returns a share_url and preview_id required by Send SMS

On the preview page, you can also save the message as a reusable template for later use in the web interface.

Validation

2 tools
  • Validate RCS Message - Validate message structure without sending. Returns errors, warnings, and suggestion limits
  • Validate Schedule Time - Check if a scheduled send time is valid and in the future

Composing

3 tools
  • RCS Message Limits - Get all message limits & constraints: character limits, max cards, media sizes, suggestion limits
  • RCS Button Guidelines - Guidelines for card actions vs chip suggestions, with best practices and examples
  • RCS Workflow Guide - Recommended workflows and step-by-step guides for common messaging tasks

Monitoring

3 tools
  • Batch Job Status - Get the status and progress of a specific batch sending job
  • Cancel Batch Job - Cancel a batch job. Only cancels messages not yet sent
  • List RCS Jobs - List all jobs (scheduled, processing, completed, failed, cancelled) with filtering and pagination

Engagement & History

4 tools
  • List RCS Interactions - List interactions (button clicks, replies) for campaigns. Track engagement by campaign, phone number, or date range
  • Message Log - Query message history with filtering. Look up by ID or filter by date, phone number, campaign, status, and direction
  • Get Message Content - Retrieve the full, re-sendable content of a single message by ID. Returns the structured RCS content (message type + content object) or SMS text, ready to resend or adapt
  • RCS Conversation Status - Check if a phone number has an active 24-hour session. Follow-up messages within the window are free

Account

3 tools
  • List Sender Names - List all sender names (SMS and RCS) with status, type, and capabilities
  • RCS Timezones - Get available timezones for scheduling, including configured timezone and current local times
  • RCS Health Check - Quick health check for the RCS service

Contacts

9 tools
  • List Contacts - Search, filter, sort and paginate contacts. Optionally include custom field values
  • Count Contacts - Count contacts with optional filters without loading data
  • Get Contact - Get a single contact by ID with groups and custom fields
  • Create Contact - Create a contact with phone, name, email, groups and custom fields
  • Update Contact - Partial update of an existing contact
  • Delete Contact - Permanently delete with full cascading cleanup
  • Bulk Create Contacts - Create or upsert up to 1,000 contacts at once
  • Bulk Disable Contacts - Soft-disable multiple contacts, cancelling their scheduled messages
  • Bulk Enable Contacts - Re-enable previously disabled contacts

Groups

7 tools
  • List Groups - List all contact groups with contact counts
  • Get Group - Get a group by ID, optionally with paginated contacts
  • Create Group - Create a new contact group with name and description
  • Update Group - Update a group's name and/or description
  • Delete Group - Delete a group without deleting its contacts
  • Add Contacts to Group - Add contacts with bidirectional sync to linked campaigns/flows
  • Remove Contacts from Group - Remove contacts with cascading removal from linked campaigns/flows

Custom Fields

4 tools
  • List Custom Fields - List all merge field definitions. Tags become {{tag}} placeholders in messages
  • Create Custom Field - Create a new field with a unique tag for use in messages
  • Delete Custom Field - Delete a field definition, with usage check and force option
  • Set Contact Custom Fields - Set or delete custom field values on a specific contact

Templates

5 tools
  • List Templates - List templates with filtering by type, RCS subtype, category, and name search
  • Get Template - Get a single template by ID with parsed RCS content
  • Create Template - Create a new message template (SMS, WhatsApp, or RCS)
  • Update Template - Partial update of an existing template
  • Delete Template - Permanently delete a message template

Template Groups

5 tools
  • List Template Groups - List all template groups (folders for message templates) with template counts, plus the count of ungrouped templates
  • Create Template Group - Create a new template group. Group names must be unique
  • Update Template Group - Rename a template group
  • Delete Template Group - Delete a group without deleting its templates - they become ungrouped
  • Assign Templates to Group - Move one or more templates into a group, or remove them from any group. Each template belongs to at most one group
Message Types

All RCS Message Types Supported

Message Formats

  • Text - Rich text with optional suggestion chips
  • Text Basic - Plain text, no buttons, max 160 characters
  • Rich Card - Card with title, description, image/video, and up to 4 buttons
  • Carousel - Multiple swipeable cards (up to 10)
  • Media - Images, videos, audio files and documents

Interactive Buttons

  • Open URL - Opens a webpage
  • Dial - Starts a phone call
  • Postback - Sends a reply back for chatbot flows
  • Open in Webview - Opens a URL in an in-app browser
  • View Location - Opens a map location
  • Add to Calendar - Creates a calendar event
  • Reply Chip - Quick-reply button below the message
Features

Enterprise Features Built In

Batch Sending

Send to up to 10,000 recipients in a single command. Messages are queued for background processing.

SMS Fallback

Every RCS message can include an automatic SMS fallback for devices without RCS support. Just specify the fallback text and SMS sender.

Scheduling

Schedule messages for future delivery with timezone-aware scheduling. Supports all IANA timezones.

Conversation-Based Billing

Save credits with 24-hour conversation windows. The first message opens a window - all subsequent messages within 24 hours are free.

Campaign Analytics

Track engagement across campaigns: button clicks, user replies, URL opens, and dial actions. Filter by campaign, phone number, and date range.

Validation Before Sending

Validate any message before sending it. The AI assistant checks structure, character limits, button counts, and media constraints.

Safety First

Preview & Approve Before Sending

Every message sent via MCP goes through a preview step. You always see exactly what will be sent before it goes out.

1

Validate

AI checks message structure, limits, and constraints automatically

2

Preview

A visual preview page shows exactly how the message will look on a phone

3

Approve

Review the preview and approve it for sending - or save it as a template

4

Send

The AI sends the message only after preview verification and approval

Approval Setting

The “Approve before sending” setting is a checkbox in the web app under Settings → API & MCP → MCP Settings.

  • Enabled (recommended) - you must approve every message on the preview page before the AI can send it
  • Disabled - the AI can send immediately after creating a preview (preview step still required)

Save as Template

On the preview page, you can also save the message as a reusable template for later use in the web interface.

  • Compose with AI, preview it, save for campaigns
  • Add a template name and optional category

Message Limits

Limit Value
Text messageMax 2,048 characters
Rich card titleMax 60 characters
Rich card descriptionMax 200 characters
Card action buttonsMax 4 per card, 25 characters each
Suggestion chipsMax 11, 25 characters each
Carousel cardsMax 10 cards
Batch recipientsMax 10,000 per request
Media file sizeMax 1 MB
Campaign nameMax 100 characters
SMS fallbackMax 1,530 characters
Throughput75 messages/second

MCP vs REST API

Which one is right for you?

MCP REST API
Interface Natural language (talk to your AI) Code (HTTP requests)
Setup Add URL to AI client Integrate into your application
Authentication OAuth or API Key API Key
Best for Business users, marketers, quick tasks Developers, automated systems
Coding required No Yes
Batch sending Yes (up to 10,000) Yes (up to 10,000)
Scheduling Yes Yes
SMS Fallback Yes Yes
Analytics Yes Yes

Both methods access the same SendRCS platform and features. MCP is the no-code option - perfect for anyone who wants to control RCS messaging through conversation with an AI assistant.

Endpoint 

URL:       https://api.sendrcs.eu/api/mcp
Protocol:  Streamable HTTP (JSON-RPC 2.0)
Standard:  Model Context Protocol (MCP) by Anthropic

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