Linq

Use Linq to send and read messages over iMessage, SMS, and RCS with an API key.

The 34 operations cover chats, messages, attachments, phone numbers, capability checks, contact cards, and webhook subscriptions. Send media, link previews, effects, tapback reactions, inline replies, voice memos, or edited messages; and manage group participants, names, and icons.

Check iMessage or RCS capability before selecting a preferred service. Upload attachments up to the operation's 100 MB limit. Webhook subscriptions cover message, reaction, participant, and call events, with HMAC-SHA256 signature verification.

Use the block

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.

Actions

Add Participant

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

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`chatId`	string	Yes	The unique identifier of the group chat
`handle`	string	Yes	Phone number (E.164 format) or email address of the participant to add

Output

Parameter	Type	Description
`message`	string	Human-readable status message
`status`	string	Queued action status
`traceId`	string	Trace ID for the queued action

Check iMessage Capability

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

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`address`	string	Yes	Phone number (E.164 format) or email address to check
`from`	string	No	Sender phone number to check from (defaults to an available number)

Output

Parameter	Type	Description
`address`	string	The address that was checked
`available`	boolean	Whether the address supports iMessage

Check RCS Capability

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

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`address`	string	Yes	Phone number (E.164 format) to check
`from`	string	No	Sender phone number to check from (defaults to an available number)

Output

Parameter	Type	Description
`address`	string	The address that was checked
`available`	boolean	Whether the address supports RCS

Upload Attachment

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

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`file`	file	No	File to upload (a UserFile from a file-upload field or a previous block)
`filename`	string	No	Override the file name (defaults to the uploaded file name)
`contentType`	string	No	Override the MIME type (defaults to the uploaded file type)

Output

Parameter	Type	Description
`attachmentId`	string	Reusable attachment ID to reference when sending messages or voice memos
`downloadUrl`	string	URL the attachment can be downloaded from
`filename`	string	File name
`contentType`	string	MIME type of the file
`sizeBytes`	number	File size in bytes
`status`	string	Upload status

Create Chat

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

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`from`	string	Yes	Sender phone number in E.164 format (e.g. +14155551234)
`to`	array	Yes	Recipient handles (phone numbers in E.164 format or email addresses)
`text`	string	No	Text content of the first message. Optional, but at least one of text, media, attachment, or link is required
`mediaUrl`	string	No	Optional publicly accessible HTTPS URL of an image, video, or file to attach
`attachmentId`	string	No	Optional ID of a pre-uploaded attachment to send instead of a media URL
`preferredService`	string	No	Preferred delivery service: iMessage, SMS, or RCS
`effectName`	string	No	Optional iMessage effect name (e.g. confetti, fireworks, lasers)
`effectType`	string	No	Optional effect type: screen or bubble
`replyToMessageId`	string	No	Optional message ID to reply to inline
`replyToPartIndex`	number	No	Optional part index of the message being replied to
`idempotencyKey`	string	No	Optional idempotency key to safely retry the request

Output

Parameter	Type	Description
`chatId`	string	ID of the created chat
`displayName`	string	Display name of the chat
`isGroup`	boolean	Whether the chat is a group chat
`service`	string	Delivery service used (iMessage, SMS, RCS)
`handles`	json	Participant handles in the chat
`healthStatus`	json	Messaging line health status
`message`	json	The sent message object with parts and delivery info

Create Contact Card

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

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`phoneNumber`	string	Yes	Phone number in E.164 format the card applies to
`firstName`	string	Yes	First name to display
`lastName`	string	No	Last name to display
`imageUrl`	string	No	Profile photo URL

Output

Parameter	Type	Description
`phoneNumber`	string	Phone number the card applies to
`firstName`	string	First name
`lastName`	string	Last name
`imageUrl`	string	Profile photo URL
`isActive`	boolean	Whether the card is active

Create Webhook Subscription

Subscribe an HTTPS endpoint to Linq webhook events

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`targetUrl`	string	Yes	HTTPS endpoint that will receive webhook events
`subscribedEvents`	array	Yes	Event types to subscribe to (e.g. message.sent, message.delivered)
`phoneNumbers`	array	No	E.164 phone numbers to filter events by (omit for all numbers)

Output

Parameter	Type	Description
`id`	string	Subscription ID
`targetUrl`	string	Endpoint that receives events
`subscribedEvents`	json	Subscribed event types
`phoneNumbers`	json	Filtered phone numbers (null = all)
`isActive`	boolean	Whether the subscription is active
`createdAt`	string	ISO 8601 creation timestamp
`updatedAt`	string	ISO 8601 update timestamp
`signingSecret`	string	HMAC-SHA256 signing secret. Store securely — it cannot be retrieved again

Delete Attachment

Permanently delete an attachment owned by your account

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`attachmentId`	string	Yes	The unique identifier of the attachment to delete

Output

Parameter	Type	Description
`success`	boolean	Whether the attachment was deleted

Delete Message

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

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`messageId`	string	Yes	The unique identifier of the message to delete

Output

Parameter	Type	Description
`success`	boolean	Whether the message was deleted

Delete Webhook Subscription

Delete a webhook subscription from your account

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`subscriptionId`	string	Yes	The unique identifier of the webhook subscription to delete

Output

Parameter	Type	Description
`success`	boolean	Whether the subscription was deleted

Edit Message

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

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`messageId`	string	Yes	The unique identifier of the message to edit
`text`	string	Yes	New text content for the message part
`partIndex`	number	No	Index of the message part to edit (defaults to 0)

Output

Parameter	Type	Description
`id`	string	Message ID
`chatId`	string	ID of the chat the message belongs to
`isFromMe`	boolean	Whether the message was sent by you
`deliveryStatus`	string	Delivery status (pending, queued, sent, delivered, received, read, failed)
`isDelivered`	boolean	Whether the message was delivered (deprecated; use deliveryStatus)
`isRead`	boolean	Whether the message was read (deprecated; use deliveryStatus)
`service`	string	Delivery service (iMessage, SMS, RCS)
`createdAt`	string	ISO 8601 creation timestamp
`updatedAt`	string	ISO 8601 update timestamp
`sentAt`	string	ISO 8601 sent timestamp
`parts`	json	Updated message parts with reactions
`message`	json	The full updated message object

Get Attachment

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

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`attachmentId`	string	Yes	The unique identifier of the attachment

Output

Parameter	Type	Description
`id`	string	Attachment ID
`filename`	string	File name
`contentType`	string	MIME type of the file
`sizeBytes`	number	File size in bytes
`status`	string	Upload status (pending, complete, failed)
`downloadUrl`	string	URL to download the file
`createdAt`	string	ISO 8601 creation timestamp

Get Chat

Retrieve a chat by ID, including participants and line health

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`chatId`	string	Yes	The unique identifier of the chat

Output

Parameter	Type	Description
`id`	string	Chat ID
`displayName`	string	Display name of the chat
`isGroup`	boolean	Whether the chat is a group chat
`isArchived`	boolean	Whether the chat is archived
`service`	string	Delivery service (iMessage, SMS, RCS)
`createdAt`	string	ISO 8601 creation timestamp
`updatedAt`	string	ISO 8601 update timestamp
`handles`	json	Participant handles in the chat
`healthStatus`	json	Messaging line health status

Get Contact Card

Retrieve contact cards, optionally filtered by phone number

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`phoneNumber`	string	No	E.164 phone number to filter by (omit to return all cards)

Output

Parameter	Type	Description
`contactCards`	array	Contact cards on the account
↳ `phoneNumber`	string	Phone number in E.164 format
↳ `firstName`	string	First name
↳ `lastName`	string	Last name
↳ `imageUrl`	string	Profile photo URL
↳ `isActive`	boolean	Whether the card is active

Get Message

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

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`messageId`	string	Yes	The unique identifier of the message

Output

Parameter	Type	Description
`id`	string	Message ID
`chatId`	string	ID of the chat the message belongs to
`isFromMe`	boolean	Whether the message was sent by you
`deliveryStatus`	string	Delivery status (pending, queued, sent, delivered, received, read, failed)
`isDelivered`	boolean	Whether the message was delivered (deprecated; use deliveryStatus)
`isRead`	boolean	Whether the message was read (deprecated; use deliveryStatus)
`service`	string	Delivery service (iMessage, SMS, RCS)
`createdAt`	string	ISO 8601 creation timestamp
`updatedAt`	string	ISO 8601 update timestamp
`sentAt`	string	ISO 8601 sent timestamp
`parts`	json	Message parts (text, media, link) with reactions
`message`	json	The full message object

Get Webhook Subscription

Retrieve a webhook subscription by ID

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`subscriptionId`	string	Yes	The unique identifier of the webhook subscription

Output

Parameter	Type	Description
`id`	string	Subscription ID
`targetUrl`	string	Endpoint that receives events
`subscribedEvents`	json	Subscribed event types
`phoneNumbers`	json	Filtered phone numbers (null = all)
`isActive`	boolean	Whether the subscription is active
`createdAt`	string	ISO 8601 creation timestamp
`updatedAt`	string	ISO 8601 update timestamp

Leave Chat

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

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`chatId`	string	Yes	The unique identifier of the group chat

Output

Parameter	Type	Description
`message`	string	Human-readable status message
`status`	string	Queued action status (e.g. accepted)
`traceId`	string	Trace ID for the queued action

List Chats

List chats, optionally filtered by sender or participant handle

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`from`	string	No	Filter by sender phone number in E.164 format
`to`	string	No	Filter by participant handle (phone number or email)
`limit`	number	No	Results per page (default 20, max 100)
`cursor`	string	No	Pagination cursor from a previous response

Output

Parameter	Type	Description
`chats`	json	Array of chat objects
`nextCursor`	string	Cursor for the next page, or null if there are no more results

List Messages

List messages in a chat with pagination

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`chatId`	string	Yes	The unique identifier of the chat
`limit`	number	No	Maximum number of messages to return
`cursor`	string	No	Pagination cursor from a previous response

Output

Parameter	Type	Description
`messages`	json	Array of message objects with parts and reactions
`nextCursor`	string	Cursor for the next page, or null if there are no more results

List Phone Numbers

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

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key

Output

Parameter	Type	Description
`phoneNumbers`	array	Phone numbers assigned to the account
↳ `id`	string	Phone number ID
↳ `phoneNumber`	string	Phone number in E.164 format
↳ `forwardingNumber`	string	Forwarding number in E.164 format, or null
↳ `healthStatus`	json	Line reputation/health status (status, doc_url)

List Thread Messages

List all messages in the thread that contains a given message

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`messageId`	string	Yes	The ID of any message in the thread
`order`	string	No	Sort order: asc (oldest first) or desc (newest first)
`limit`	number	No	Maximum number of messages to return
`cursor`	string	No	Pagination cursor from a previous response

Output

Parameter	Type	Description
`messages`	json	Array of message objects in the thread
`nextCursor`	string	Cursor for the next page, or null if there are no more results

List Webhook Events

List all webhook event types available to subscribe to

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key

Output

Parameter	Type	Description
`events`	json	Available webhook event type names
`docUrl`	string	Documentation URL for webhook events

List Webhook Subscriptions

List all webhook subscriptions on your account

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key

Output

Parameter	Type	Description
`subscriptions`	array	Webhook subscriptions
↳ `id`	string	Subscription ID
↳ `targetUrl`	string	Endpoint that receives events
↳ `subscribedEvents`	json	Subscribed event types
↳ `phoneNumbers`	json	Filtered phone numbers (null = all)
↳ `isActive`	boolean	Whether the subscription is active
↳ `createdAt`	string	ISO 8601 creation timestamp
↳ `updatedAt`	string	ISO 8601 update timestamp

Mark Chat as Read

Mark messages in a chat as read (only applies to 1:1 iMessage/RCS; no effect on group chats)

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`chatId`	string	Yes	The unique identifier of the chat

Output

Parameter	Type	Description
`success`	boolean	Whether the chat was marked as read

React to Message

Add or remove a tapback reaction on a message

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`messageId`	string	Yes	The unique identifier of the message to react to
`operation`	string	Yes	Whether to add or remove the reaction: add or remove
`type`	string	Yes	Reaction type: love, like, dislike, laugh, emphasize, question, custom, or sticker
`customEmoji`	string	No	Emoji to use when type is custom
`partIndex`	number	No	Index of the message part to react to (defaults to the entire message)

Output

Parameter	Type	Description
`message`	string	Human-readable status message
`status`	string	Queued action status
`traceId`	string	Trace ID for the queued action

Remove Participant

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

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`chatId`	string	Yes	The unique identifier of the group chat
`handle`	string	Yes	Phone number (E.164 format) or email address of the participant to remove

Output

Parameter	Type	Description
`message`	string	Human-readable status message
`status`	string	Queued action status
`traceId`	string	Trace ID for the queued action

Send Message

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

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`chatId`	string	Yes	The unique identifier of the chat
`text`	string	No	Text content of the message. Optional, but at least one of text, media, attachment, or link is required
`mediaUrl`	string	No	Optional publicly accessible HTTPS URL of an image, video, or file to attach
`attachmentId`	string	No	Optional ID of a pre-uploaded attachment to send instead of a media URL
`linkUrl`	string	No	Optional URL to send as a rich link preview. Linq requires a link to be its own message, so when set, text and media are ignored
`preferredService`	string	No	Preferred delivery service: iMessage, SMS, or RCS
`effectName`	string	No	Optional iMessage effect name (e.g. confetti, fireworks, lasers)
`effectType`	string	No	Optional effect type: screen or bubble
`replyToMessageId`	string	No	Optional message ID to reply to inline
`replyToPartIndex`	number	No	Optional part index of the message being replied to
`idempotencyKey`	string	No	Optional idempotency key to safely retry the request

Output

Parameter	Type	Description
`chatId`	string	ID of the chat the message was sent to
`messageId`	string	ID of the sent message
`deliveryStatus`	string	Delivery status (pending, queued, sent, delivered, received, read, failed)
`sentAt`	string	ISO 8601 timestamp the message was sent
`service`	string	Delivery service (iMessage, SMS, RCS)
`message`	json	The full sent message object with parts

Send Voice Memo

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

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`chatId`	string	Yes	The unique identifier of the chat
`voiceMemoUrl`	string	No	Publicly accessible HTTPS URL of the audio file (MP3, M4A, AAC, CAF, WAV, AIFF, AMR)
`attachmentId`	string	No	ID of a pre-uploaded audio attachment (use instead of voiceMemoUrl)

Output

Parameter	Type	Description
`id`	string	ID of the sent voice memo message
`status`	string	Delivery status
`from`	string	Sender handle
`to`	json	Recipient handles
`service`	string	Delivery service (iMessage, SMS, RCS)
`voiceMemo`	json	Audio file metadata (id, filename, mime_type, size_bytes, url, duration_ms)

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

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`chatId`	string	Yes	The unique identifier of the chat

Output

Parameter	Type	Description
`success`	boolean	Whether the contact card was shared

Start Typing Indicator

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

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`chatId`	string	Yes	The unique identifier of the chat

Output

Parameter	Type	Description
`success`	boolean	Whether the typing indicator was sent

Stop Typing Indicator

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

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`chatId`	string	Yes	The unique identifier of the chat

Output

Parameter	Type	Description
`success`	boolean	Whether the typing indicator was stopped

Update Chat

Update chat properties such as group display name and icon

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`chatId`	string	Yes	The unique identifier of the chat
`displayName`	string	No	New display name for the group chat
`groupChatIcon`	string	No	New group chat icon (publicly accessible image URL)

Output

Parameter	Type	Description
`chatId`	string	ID of the updated chat
`status`	string	Status of the queued update

Update Contact Card

Partially update an existing active contact card for a phone number

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`phoneNumber`	string	Yes	Phone number in E.164 format identifying the card to update
`firstName`	string	No	New first name
`lastName`	string	No	New last name
`imageUrl`	string	No	New profile photo URL

Output

Parameter	Type	Description
`phoneNumber`	string	Phone number the card applies to
`firstName`	string	First name
`lastName`	string	Last name
`imageUrl`	string	Profile photo URL
`isActive`	boolean	Whether the card is active

Update Webhook Subscription

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

Inputs and outputs

Input

Parameter	Type	Required	Description
`apiKey`	string	Yes	Linq API key
`subscriptionId`	string	Yes	The unique identifier of the webhook subscription
`targetUrl`	string	No	New HTTPS endpoint that will receive events
`subscribedEvents`	array	No	New set of event types to subscribe to
`phoneNumbers`	array	No	New set of E.164 phone numbers to filter by
`isActive`	boolean	No	Whether the subscription should be active

Output

Parameter	Type	Description
`id`	string	Subscription ID
`targetUrl`	string	Endpoint that receives events
`subscribedEvents`	json	Subscribed event types
`phoneNumbers`	json	Filtered phone numbers (null = all)
`isActive`	boolean	Whether the subscription is active
`createdAt`	string	ISO 8601 creation timestamp
`updatedAt`	string	ISO 8601 update timestamp

Triggers

A trigger starts a workflow when a supported event occurs in this service.

Linq Message Delivered

Trigger workflow when a message is delivered

Configuration

Parameter	Type	Required	Description
`triggerApiKey`	string	Yes	Required to create the webhook subscription in Linq.
`triggerPhoneNumbers`	string	No	Comma-separated E.164 numbers to restrict which numbers deliver events.

Output

Parameter	Type	Description
`eventType`	string	Event type (e.g. message.received, message.delivered, reaction.added)
`eventId`	string	Unique event identifier used for deduplication
`createdAt`	string	ISO 8601 timestamp of when the event occurred
`webhookVersion`	string	Payload schema version of the delivered event
`data`	json	Full event payload (shape varies by event type — message, reaction, chat, etc.)

Linq Message Failed

Trigger workflow when a message fails to deliver

Configuration

Parameter	Type	Required	Description
`triggerApiKey`	string	Yes	Required to create the webhook subscription in Linq.
`triggerPhoneNumbers`	string	No	Comma-separated E.164 numbers to restrict which numbers deliver events.

Output

Parameter	Type	Description
`eventType`	string	Event type (e.g. message.received, message.delivered, reaction.added)
`eventId`	string	Unique event identifier used for deduplication
`createdAt`	string	ISO 8601 timestamp of when the event occurred
`webhookVersion`	string	Payload schema version of the delivered event
`data`	json	Full event payload (shape varies by event type — message, reaction, chat, etc.)

Linq Message Read

Trigger workflow when a message is read

Configuration

Parameter	Type	Required	Description
`triggerApiKey`	string	Yes	Required to create the webhook subscription in Linq.
`triggerPhoneNumbers`	string	No	Comma-separated E.164 numbers to restrict which numbers deliver events.

Output

Parameter	Type	Description
`eventType`	string	Event type (e.g. message.received, message.delivered, reaction.added)
`eventId`	string	Unique event identifier used for deduplication
`createdAt`	string	ISO 8601 timestamp of when the event occurred
`webhookVersion`	string	Payload schema version of the delivered event
`data`	json	Full event payload (shape varies by event type — message, reaction, chat, etc.)

Linq Message Received

Trigger workflow when an inbound message is received

Configuration

Parameter	Type	Required	Description
`triggerApiKey`	string	Yes	Required to create the webhook subscription in Linq.
`triggerPhoneNumbers`	string	No	Comma-separated E.164 numbers to restrict which numbers deliver events.

Output

Parameter	Type	Description
`eventType`	string	Event type (e.g. message.received, message.delivered, reaction.added)
`eventId`	string	Unique event identifier used for deduplication
`createdAt`	string	ISO 8601 timestamp of when the event occurred
`webhookVersion`	string	Payload schema version of the delivered event
`data`	json	Full event payload (shape varies by event type — message, reaction, chat, etc.)

Linq Reaction Added

Trigger workflow when a reaction is added to a message

Configuration

Parameter	Type	Required	Description
`triggerApiKey`	string	Yes	Required to create the webhook subscription in Linq.
`triggerPhoneNumbers`	string	No	Comma-separated E.164 numbers to restrict which numbers deliver events.

Output

Parameter	Type	Description
`eventType`	string	Event type (e.g. message.received, message.delivered, reaction.added)
`eventId`	string	Unique event identifier used for deduplication
`createdAt`	string	ISO 8601 timestamp of when the event occurred
`webhookVersion`	string	Payload schema version of the delivered event
`data`	json	Full event payload (shape varies by event type — message, reaction, chat, etc.)

Linq Webhook (All Events)

Trigger on any Linq webhook event (messages, reactions, chats, and more)

Configuration

Parameter	Type	Required	Description
`triggerApiKey`	string	Yes	Required to create the webhook subscription in Linq.
`triggerPhoneNumbers`	string	No	Comma-separated E.164 numbers to restrict which numbers deliver events.

Output

Parameter	Type	Description
`eventType`	string	Event type (e.g. message.received, message.delivered, reaction.added)
`eventId`	string	Unique event identifier used for deduplication
`createdAt`	string	ISO 8601 timestamp of when the event occurred
`webhookVersion`	string	Payload schema version of the delivered event
`data`	json	Full event payload (shape varies by event type — message, reaction, chat, etc.)