Linq

Overview

Reach people on iMessage, SMS, and RCS through Linq. Start chats, send messages with media, links, effects, and replies, send voice memos, react with tapbacks, manage group participants, check iMessage/RCS capability, configure contact cards, and subscribe to webhook events — all through a single Linq API key.

How to automate Linq with SteelEngine

1. 01

   Create a free account

   Sign up at steelengine.com in seconds. No credit card required. Your workspace is ready immediately.

2. 02

   Add a Linq block

   Open a workflow, drag a Linq block onto the canvas, and paste in your Linq API key.

3. 03

   Configure, connect, and run

   Pick the tool you need, wire in an AI agent for reasoning or data transformation, and run. Your Linq automation is live.

Supported tools

34 Linq tools available in SteelEngine

• Send Message

  Send a message to an existing chat, with optional media, link, effect, or reply

• Create Chat

  Start a new iMessage, SMS, or RCS chat and send the first message

• List Chats

  List chats, optionally filtered by sender or participant handle

• Get Chat

  Retrieve a chat by ID, including participants and line health

• Update Chat

  Update chat properties such as group display name and icon

• Mark Chat as Read

  Mark all messages in a chat as read

• Leave Chat

  Leave an iMessage group chat (4+ active participants; not supported for direct chats)

• Add Participant

  Add a participant to a group chat (3+ existing participants)

• Remove Participant

  Remove a participant from a group chat (minimum 3 participants must remain)

• Start Typing

  Show a typing indicator in a one-on-one chat (iMessage only, not group chats)

• Stop Typing

  Stop the typing indicator in a one-on-one chat (iMessage only, not group chats)

• Send Voice Memo

  Send a voice memo to a chat from a URL or a pre-uploaded attachment

• Share Contact Card

  Share your configured contact card (Name and Photo Sharing) with a chat

• List Messages

  List messages in a chat with pagination

• List Thread

  List all messages in the thread that contains a given message

• Get Message

  Retrieve a single message by ID, including parts, reactions, and delivery status

• Edit Message

  Edit the text of a sent message (up to 5 times, within 15 minutes of sending; iMessage only)

• Delete Message

  Delete a message from the Linq API only (does not unsend it; recipients still see it)

• React to Message

  Add or remove a tapback reaction on a message

• Create Attachment

  Upload a file to Linq as a reusable attachment (max 100MB) and get an attachment ID to send in messages

• Get Attachment

  Retrieve metadata for an attachment, including its download URL and status

• Delete Attachment

  Permanently delete an attachment owned by your account

• List Phone Numbers

  List all phone numbers assigned to your partner account, with line health

• Check iMessage

  Check whether an address (phone number or email) supports iMessage

• Check RCS

  Check whether an address (phone number or email) supports RCS

• Get Contact Card

  Retrieve contact cards, optionally filtered by phone number

• Create Contact Card

  Set up a contact card (Name and Photo Sharing) for a phone number

• Update Contact Card

  Partially update an existing active contact card for a phone number

• Create Webhook Subscription

  Subscribe an HTTPS endpoint to Linq webhook events

• List Webhook Subscriptions

  List all webhook subscriptions on your account

• Get Webhook Subscription

  Retrieve a webhook subscription by ID

• Update Webhook Subscription

  Update a webhook subscription (target URL, events, phone filter, or active state)

• Delete Webhook Subscription

  Delete a webhook subscription from your account

• List Webhook Events

  List all webhook event types available to subscribe to

Frequently asked questions