Name: Sinch
Author: sinch

LABSCO SUMMARY

A configuration tool that tells you why something is missing.

With this many credential sets, the usual failure is a tool that silently is not there. Asking the server to list its tools and explain each disabled one turns a confusing absence into a sentence about which key you have not set — worth running first. Beyond sending, the unusual coverage is administrative: creating conversation apps, attaching channels, and taking an RCS sender through carrier review are all callable, which most vendor servers leave to the dashboard.

What it is

The vendor's own server over the Sinch APIs. Messaging, voice, verification, email, RCS sender registration, WhatsApp templates and number provisioning are all covered, each area authenticated with its own credentials so you enable only what you use.

What you get

send-text-message, send-media-message, send-choice-message and send-location-message across supported channels
send-template-message and send-whatsapp-template-message for predefined templates, with list-messaging-templates and list-whatsapp-templates to find them
create-conversation-app, update-conversation-app, delete-conversation-app and list-conversation-apps, plus set-sms-channel-on-app, set-rcs-channel-on-app and set-whatsapp-channel-on-app
create-webhook, update-webhook, get-webhook, list-webhooks and delete-webhook for inbound events
number-lookup, start-sms-verification and report-sms-verification for one-time-password flows
tts-callout, conference-callout, manage-conference-participant, close-conference and get-call-information on the voice side
send-email, list-email-templates, retrieve-email-info, list-email-events and analytics-metrics through Mailgun
list-rcs-senders, create-rcs-sender, update-rcs-sender, launch-rcs-sender and the test-number tools for getting an RCS sender through review
create-whatsapp-template, update-whatsapp-template and the two deletion tools for template lifecycle
search-for-available-numbers, rent-sinch-virtual-numbers, list-rented-numbers, list-available-regions and release-rented-number
sinch-mcp-configuration, which lists every tool and says why any disabled one is disabled

Requirements

A Sinch Build account and Node.js 20.x or 22.x. Credentials are per API: PROJECT_ID, KEY_ID and KEY_SECRET cover Conversation, Numbers, RCS and WhatsApp templates; Verification and Voice each want their own APPLICATION_KEY and APPLICATION_SECRET; email wants MAILGUN_API_KEY. CONVERSATION_REGION defaults to us and also accepts eu and br. Sending SMS may require DEFAULT_SMS_ORIGINATOR depending on the country, location messages need a Google geocoding key, and RCS has to be enabled on your project by Sinch first. Phone numbers go in everywhere in E.164 form. It is a developer preview.

Setup effort

One command plus a key — npx -y @sinch/mcp, then supply credentials

See installation options

USE CASES

01

Reaching someone on whichever channel they use

Send text, media or an interactive choice message without writing per-channel code.

send-text-messagesend-media-messagesend-choice-message

02

Confirming a phone number belongs to the person

Check the number's capabilities, send the one-time password, then submit the code.

number-lookupstart-sms-verificationreport-sms-verification

03

Getting a real person on a call

Place a text-to-speech call, or dial several people into a conference and manage who is muted.

tts-calloutconference-calloutmanage-conference-participant

04

Getting an RCS sender approved

Create it, fill in brand details and test numbers, then submit it for carrier review.

create-rcs-senderadd-rcs-test-numberlaunch-rcs-sender

05

Getting a WhatsApp template through Meta

Create the template as a draft, revise it, and resubmit when it comes back.

create-whatsapp-templateupdate-whatsapp-template

06

Getting a number to send from

Search availability in the region, rent it, and release it when you no longer need it.

search-for-available-numbersrent-sinch-virtual-numbersrelease-rented-number

07

Finding out why a tool is missing

List every tool and read the reason each disabled one is unavailable.

sinch-mcp-configuration

08

Seeing whether an email landed

Retrieve its delivery status and read recent bounces, opens and clicks.

retrieve-email-infolist-email-events

53 tools

Listed in project docs. Your client may show a different list.

send-text-message

send-media-message

send-template-message

send-whatsapp-template-message

send-choice-message

send-location-message

list-conversation-apps

create-conversation-app

update-conversation-app

delete-conversation-app

set-sms-channel-on-app

set-rcs-channel-on-app

set-whatsapp-channel-on-app

list-messaging-templates

list-webhooks

BEFORE YOU INSTALL

What to know first

Tools you get

53 tools named in the project's documentation.

Requires

npx on PATH
KEY_ID in your environment
KEY_SECRET in your environment
PROJECT_ID in your environment

Optional

APPLICATION_KEY in your environment
APPLICATION_SECRET in your environment
MAILGUN_API_KEY in your environment

Where it runs

Both documented setups run the server on your machine.

INSTALLATION

Connect your client

Server setup

TERMINAL

npx -y @sinch/mcp

MCP Clients

Claude Desktop — npx

CLAUDE DESKTOP — NPX · JSON

{
  "mcpServers": {
    "sinch": {
      "command": "npx",
      "args": [
        "-y",
        "@sinch/mcp"
      ],
      "env": {
        "PROJECT_ID": "",
        "KEY_ID": "",
        "KEY_SECRET": "",
        "CONVERSATION_APP_ID": "",
        "CONVERSATION_REGION": "",
        "DEFAULT_SMS_ORIGINATOR": "",
        "GEOCODING_API_KEY": "",
        "APPLICATION_KEY": "",
        "APPLICATION_SECRET": "",
        "CALLING_LINE_IDENTIFICATION": "",
        "MAILGUN_API_KEY": "",
        "MAILGUN_DOMAIN": "",
        "MAILGUN_SENDER_ADDRESS": ""
      }
    }
  }
}

Claude Desktop — Local build

CLAUDE DESKTOP — LOCAL BUILD · JSON

{
  "mcpServers": {
    "sinch": {
      "command": "node",
      "args": [
        "<YOUR_PATH_TO_SINCH_MCP_SERVER>/dist/index.js"
      ],
      "env": {
        "PROJECT_ID": "",
        "KEY_ID": "",
        "KEY_SECRET": "",
        "CONVERSATION_APP_ID": "",
        "CONVERSATION_REGION": "",
        "DEFAULT_SMS_ORIGINATOR": "",
        "GEOCODING_API_KEY": "",
        "APPLICATION_KEY": "",
        "APPLICATION_SECRET": "",
        "CALLING_LINE_IDENTIFICATION": "",
        "MAILGUN_API_KEY": "",
        "MAILGUN_DOMAIN": "",
        "MAILGUN_SENDER_ADDRESS": ""
      }
    }
  }
}

Sinch