Conversations inbox and messages APIs

Last modified: August 22, 2025

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Please note:

This feature is currently in beta and is subject to change based on testing and feedback. By using this functionality, you agree to adhere to HubSpot’s Developer Terms & Developer Beta Terms.

The conversations APIs enable you to manage and interact with the conversations inbox, channels, and messages. For example, you can use these APIs to:

Get and sort conversations inboxes, channels, threads, and messages.
Update thread statuses.
Delete and restore threads.
Send outbound messages via existing conversations channels.
Send an internal comment to an agent.
Retrieve conversation data to create advanced reports and analytics in external tools.

You could also use these APIs to integrate existing channels with other apps such as Slack or Microsoft Teams to send replies or receive notifications. You can also use webhooks with the conversations API. Learn more about the available webhook events.

Please note:

If you’re planning on defining a custom channel that users can connect to their HubSpot account, check out the custom channels API.

Scope requirements

For any requests to the GET endpoints, or a POST batch read request to the get actors endpoint, you must have conversations.read access. All other endpoints require conversations.write access. Learn more about authorizing scopes for your app.

Filter and sort results

When retrieving inboxes, channels, channel accounts, threads, and messages using the endpoints outlined in this article, you can use different query parameters to filter and sort your responses.

Parameter	Type	Description
`sort`	String	Set the sort order of the response. You can sort by multiple properties.
`after`	String	The paging cursor token of the last successfully read resource will be returned as the `paging.next.after` JSON property of a paged response containing more results.
`limit`	Integer	The maximum number of results to display per page.

You can also sort your results by any field on the channel, channel accounts, or inbox objects. For example, you could sort inboxes by name, or channel accounts by both channel ID and name.

Inboxes

To retrieve a list of inboxes set up in your account, make a GET request to conversations/v3/conversations/inboxes. When you make a successful request, the response will include the inbox IDs of the different inboxes set up in your account. To retrieve details about a specific inbox, use the inbox ID to make a GET request to conversations/v3/conversations/inboxes/{inboxId}.

Channels

You can retrieve a list of the channels connected to your inboxes by making a GET request to conversations/v3/conversations/channels. When you make a successful request, the response will include the channel IDs for the different channels connected to your inbox. To retrieve a specific channel, use the channel ID to make a GET request to conversations/v3/conversations/channels/{channelId}. You can also retrieve channel accounts, which are instances of a channel that are used to send and receive messages, like a specific chatflow created for one of your chat channels or a team email address connected as an email channel. To retrieve a list of channel accounts, make a GET request to conversations/v3/conversations/channel-accounts. You can limit the results by including the following parameters in the request URL:

Parameter	Description
`channelId`	The ID of the channel type for which you’re retrieving a channel instance.
`inboxId`	The ID of the inbox that the channel is connected to.

For example, your request may look similar to the following: https://api.hubspot.com/conversations/v3/conversations/channel-accounts?channelId=1000&inboxId=448. When you make a successful request, the response will include an id property, which is the channel account ID. For example, the response may resemble the following:

{
  "total": 1,
  "results": [
    {
      "id": "148662",
      "channelId": "1000",
      "name": "New chatflow",
      "inboxId": "481939",
      "active": false,
      "authorized": true,
      "createdAt": "2019-10-04T15:24:39.136Z",
      "archived": false
    }
  ]
}

You can use the channel account ID to retrieve a single channel account, such as a specific chatflow. To retrieve a specific channel account, make a GET request to conversations/v3/conversations/channel-accounts/{channelAccountId}.

Threads & messages

Retrieve threads

Threads are a group of related messages that make up a conversation in the inbox. To retrieve a list of all threads in your conversations inbox, make a GET request to conversations/v3/conversations/threads. To filter and search your results, you can use the following query parameters in your request:

Parameter	Type	Description
`inboxId`	Integer	Filter threads by a specific inbox ID. Note that you can only filter a single inbox ID (multiple instances of this query parameter are not supported).
`archived`	Boolean	To retrieve archived threads, use the value `true`.
`sort`	String	Set the sort order of the response. Valid options include `id` , which is the default, and `latestMessageTimestamp` , which requires the `latestMessageTimestampAfter` field to also be set. Results are always returned in ascending order.
`after`	String	The paging cursor token of the last successfully read resource will be returned as the `paging.next.after` JSON property of a paged response containing more results. Use this parameter when sorting by ID.
`latestMessageTimestampAfter`	String	The minimum `latestMessageTimestamp`. This is required only when sorting by `latestMessageTimestamp`.
`limit`	Integer	The total number of results to display per page. The maximum limit is 500.

When you make a successful request, the response will include the thread ID, which you can use to retrieve, update, or create a new message in a thread. To retrieve a specific thread by thread ID, make a GET request to conversations/v3/conversations/threads/{threadId}.

Retrieve messages

To get the entire message history, make a GET request to conversations/v3/conversations/threads/{threadId}/messages. When you make a successful request, the response will include the message ID, which you can use to retrieve a specific message. To do so, make a GET request to conversations/v3/conversations/threads/{threadId}/messages/{messageId}. For email messages, HubSpot cuts off the reply history section of an email. This is similar to how common mail clients handle reply history and longer emails. When you retrieve a message, the response will include a truncationStatus field. The value will either be NOT_TRUNCATED, TRUNCATED_TO_MOST_RECENT_REPLY, or TRUNCATED. If a message is truncated, you can make a GET request to conversations/v3/conversations/threads/{threadId}/messages/{messageId}/original-content. This will retrieve the full original version of the message.

Retrieve a subset of messages associated with a specific contact

You can also fetch messages associated with a single contact, which can be helpful if you’re creating a view where a customer can review the conversations they’ve had with your business. To filter for messages associated with a contact, provide the ID of the contact as the associatedContactId as a query parameter in the URL of your request, along with a threadStatus parameter, which can be either OPEN or CLOSED. For example, to retrieve open threads associated with a contact whose ID is 53701, you’d make a GET request to the following URL: https://api.hubapi.com/conversations/v3/conversations/threads?associatedContactId=53701&threadStatus=OPEN

Get actors

Actors are entities that interact with conversations, like a HubSpot user responding to a message or a visitor sending a message. When you make a request to retrieve threads or messages, the response will include actor IDs. All actor IDs are a single letter representing the actor type, followed by a hyphen, followed by an identifier for the actor. The identifier could be a number, a string, etc. depending on the actor type. In the table below, learn more about the different actor IDs:

Actor Type	Identifier	Description
`A-`	HubSpot user ID (number)	Agent actor, i.e. a user in the account.
`E-`	Email address (string)	Email actor. This is used for email addresses that HubSpot didn’t try to resolve to an agent actor or a visitor actor. For example, HubSpot will generally resolve the from email address to a contact, but if an incoming email has any additional email addresses included in the To field, CC field, etc., HubSpot won’t try to resolve those email addresses to contacts.
`I-`	App ID (number)	Integration actor. This is used for actions taken by an integration.
`L-`	Customer Agent ID (number)	Customer agent actor. This is used for actions taken by Breeze Customer Agent.
`S-`	S-hubspot (string)	System actor. This is used for actions taken by the HubSpot system itself.
`V-`	Contact ID (number)	Visitor actor. Keep in mind that it’s possible the visitor isn’t a contact yet.

For example, if you make a GET request to conversations/v3/conversations/threads/{threadId}/messages, the response will include a sender and recipient fields. These fields will include the actor IDs for the visitor or agent. For example, your response may look similar to the following:

{
  "results": [
    {
      "id": "3ad3474b08dd408ca57a8454e355e942",
      "conversationsThreadId": "176347007",
      "createdAt": "2019-11-18T18:47:59.949Z",
      "updatedAt": "2019-11-18T18:47:59.949Z",
      "createdBy": "V-1401",
      "client": {
        "clientType": "SYSTEM"
      },
      "senders": [
        {
          "actorId": "V-1401",
          "deliveryIdentifier": {
            "type": "CHANNEL_SPECIFIC_OPAQUE_ID",
            "value": "0232d1661ef84248bd4923cce9d3b917"
          }
        }
      ],
      "recipients": [],
      "archived": false,
      "text": "hi yes hello",
      "richText": "<div>hi yes hello</div>",
      "attachments": [],
      "truncationStatus": "NOT_TRUNCATED",
      "status": {
        "statusType": "RECEIVED"
      },
      "direction": "INCOMING",
      "channelId": "1000",
      "channelAccountId": "148662",
      "type": "MESSAGE"
    },
    {
      "id": "0c9b86b11210479eb1ae193ec5add0b7",
      "conversationsThreadId": "176347007",
      "createdAt": "2019-11-18T18:47:59.947Z",
      "createdBy": "S-hubspot",
      "client": {
        "clientType": "SYSTEM"
      },
      "senders": [
        {
          "actorId": "S-hubspot"
        }
      ],
      "recipients": [
        {
          "actorId": "V-1401",
          "deliveryIdentifier": {
            "type": "CHANNEL_SPECIFIC_OPAQUE_ID",
            "value": "0232d1661ef84248bd4923cce9d3b917"
          }
        }
      ],
      "archived": false,
      "text": "Got any questions? I'm happy to help.",
      "channelId": "1000",
      "channelAccountId": "148662",
      "type": "WELCOME_MESSAGE"
    }
  ]
}

To retrieve a single actor, make a GET request to conversations/v3/conversations/actors/{actorId}. You will need the actorId, which is included in the response to a request to get a message or thread. The response will return details like the actor name, email address, avatar, and actor type.

Update or restore threads

You can update a thread’s status by making a PATCH request to conversations/v3/conversations/threads/{threadId}. In the request body, include the thread properties to update.

Field	Description
`status`	The status of the thread, which can be `OPEN` or `CLOSED`.

To restore any soft-deleted threads, make a PATCH request to conversations/v3/conversations/threads/{threadId}?archived=true to retrieve the archived thread, then in the request body set the archived property to false.

Field	Description
`archived`	Set to `false` to restore a thread.

Please note:

At this time you can only update the thread’s status or restore a thread when making a PATCH request to this endpoint.

Archive threads

You can archive a thread by making a DELETE request to conversations/v3/conversations/threads/{threadId}. If you use this endpoint to archive a thread, the thread will be moved to the trash and will be permanently deleted after 30 days. In the section above, learn how to restore a thread before it is permanently deleted.

Add comments to threads

To add a comment to an existing thread, make a POST request to conversations/v3/conversations/threads/{threadId}/messages. Comments only appear in the inbox and are not sent to visitors. You can include the following fields in the request body when sending a comment:

Field	Description
`type`	The type of message you’re sending. This value can either be `MESSAGE` or `COMMENT`.
`text`	The content of the message.
`richText`	The content of the message in HTML format. This is optional.
`attachments`	Any attachments to attach to the comment, specified as an object containing a `fileId`. If you want to include a specific attachment, you can upload it using the Files API before making the call to add the comment.

For example, your request body may look similar to the following:

{
  "type": "COMMENT",
  "text": "Can you follow up?",
  "richText": "<p>Can you follow up?</p>"
}

Send messages to threads

Using this endpoint, an integration can send outgoing messages as a user in a HubSpot account. These messages are sent from the channel, just like if a user typed and sent a response in the inbox. To send a message to an existing thread, make a POST request to conversations/v3/conversations/threads/{threadId}/messages. When sending a message to a thread, you can include the following fields. You can include both the message details, as well as recipient information, in the request body.

Field	Description
`type`	The type of message you’re sending. This value can either be `MESSAGE` or `COMMENT`.
`text`	The content of the message.
`richText`	The content of the message in HTML format. This is optional.
`recipients`	An object representing the recipients of the message. This is the most important for email, where you can specify multiple recipients. This object includes the following fields: `actorID`: the ID associated with the message recipient. `name`: the name of the recipient. `recipientField`: for email messages, this is the type of recipient. Available values are `TO`, `CC`, or `BCC`. `deliveryIdentifiers`: for email messages, this indicates the email addresses used for the visitor and agent.
`senderActorId`	This must be an agent actor ID that is associated to the HubSpot user in the account who is sending the message.
`channelId`	The ID of a generic channel returned from the channels endpoint, like `1000` for live chat, `1001` for Facebook Messenger, `1002` for email, etc.
`channelAccountId`	The ID of an account that is part of the `channelId` channel. On an existing thread, it is recommended to copy the `channelId` and `channelAccountId` of the most recent message on the thread.
`subject`	The subject line of the email. This is ignored when sending a message to a non-email channel.
`attachments`	Any attachments to attach to the message, which can be specified as an object that contains a URL to a file hosted in your HubSpot account, or a list of quick replies if you’re sending a message via Facebook Messenger or LiveChat. Learn more about how to include attachments in the section below.

For example, your request body may look similar to the following:

{
  "type": "MESSAGE",
  "text": "Hey there, following up",
  "richText": "<p>Hey there, following up</p>",
  "recipients": [
    {
      "actorId": "E-user@hubspot.com",
      "name": "Leslie Knope",
      "recipientField": "TO",
      "deliveryIdentifiers": [
        {
          "type": "HS_EMAIL_ADDRESS",
          "value": "lknope@hubspot.com"
        }
      ]
    }
  ],
  "senderActorId": "A-3892666",
  "channelId": "1002",
  "channelAccountId": "42423411",
  "subject": "Follow up"
}

If you make a successful request, the new message will be sent to the visitor. This can appear as a message in the chat widget, an email in the thread, a message in Facebook Messenger, etc.

Include attachments in messages

Attachments can be links to a file hosted in the HubSpot files tool, or a set of quick replies if you’re sending a message using Facebook Messenger or LiveChat. To include an attachment from a file in your HubSpot account, provide the absolute URL as the fileId in the attachments field of the request body. For example, the corresponding part of the request body is shown in lines 16-18 below:

{
  "type": "MESSAGE",
  "text": "Hey there, following up",
  "recipients": {
    "actorID": "E-user@hubspot.com",
    "name": "Leslie Knope",
    "recipientField": "TO",
    "deliveryIdentifiers": [
      { "type": "HS_EMAIL_ADDRESS", "value": "lknope@hubspot.com" }
    ]
  },
  "senderActorId": "A-3892666",
  "channelId": "1002",
  "channelAccountId": "424232411",
  "subject": "Follow up",
  "attachments": {
    "fileId": "https://12345678.fs1.hubspotusercontent-na1.net/hubfs/12345678/doggo_video.mp4"
  }
}

If you connected Facebook Messenger or LiveChat as a channel, you can also specify a set of quick replies within the attachments field, which prompt the recipient with certain options that appear as tappable buttons below a message. Once tapped, the corresponding value of that option will be recorded. Quick replies should be provided as a list of objects that each contain the following fields:

label: the visible text that appears to the recipient (e.g., Red)
value: the associated value of the button that you want to record (e.g., RED)
valueType: the type of the quick reply option, which can be either TEXT or URL.

The example request body below demonstrates how to specify two quick reply options, Yes and No, on lines 21-32:

{
  "type": "MESSAGE",
  "text": "Did that answer your question?",
  "recipients": {
    "actorID": "E-user@hubspot.com",
    "name": "Leslie Knope",
    "recipientField": "TO",
    "deliveryIdentifiers": [
      {
        "type": "HS_EMAIL_ADDRESS",
        "value": "lknope@hubspot.com"
      }
    ]
  },
  "senderActorId": "A-3892666",
  "channelId": "1002",
  "channelAccountId": "424232411",
  "subject": "Follow up",
  "attachments": [
    "type": "QUICK_REPLIES",
    "quickReplies": [
      {
        "label": "Yes",
         "value": "Yes",
         "valueType": "URL"
      },
      {
        "label": "No",
        "value": "No",
        "valueType": "TEXT"
      }
    ]
  ]
}

Webhooks

Webhooks for conversations are also supported and can be used in tandem with the conversations API. You can use webhooks to subscribe to events about conversations, including thread creation, thread status and assignment changes, and new messages on threads. Learn more about using webhooks. You must have the conversations.read scope to get access to following webhooks. The available conversation webhook events are:

Event	Description
`conversation.creation`	A new thread has been created.
`conversation.deletion`	A thread has been archived.
`conversation.privacyDeletion`	A thread has been permanently deleted.
`conversation.propertyChange`	A property of a thread has been updated.
`conversation.newMessage`	A new message has been posted on a thread.

The available properties included in the payload for each event type are:

Event	Properties
`All events`	`objectId`: the ID of the Conversations thread that the webhook corresponds to.
`conversation.propertyChange`	`assignedTo`: a thread’s assignment has changed. The value is the user ID of the new assignee, unless the owner was removed. `status`: a thread’s status has changed, either to `OPEN` or `CLOSED`. `isArchived`: when a thread is restored a `conversation.propertyChange` webhook will be sent and the value will be `false`.
`conversation.newMessage`	`messageId`: the ID of the new message. `messageType`: the type of the new message. One of `MESSAGE`, `COMMENT`, `WELCOME_MESSAGE`.

Conversations Inbox & Messages

Conversations Visitor Identification

Custom Channels

Mobile chat SDK

Conversations inbox and messages APIs

Run in Postman

Please note:

Please note:

Scope requirements

Filter and sort results

Inboxes

Channels

Threads & messages

Retrieve threads

Retrieve messages

Retrieve a subset of messages associated with a specific contact

Get actors

Update or restore threads

Please note:

Archive threads

Add comments to threads

Send messages to threads

Include attachments in messages

Webhooks

Conversations Inbox & Messages

Conversations Visitor Identification

Custom Channels

Mobile chat SDK

Run in Postman

​Please note:

​Please note:

​Scope requirements

​Filter and sort results

​Inboxes

​Channels

​Threads & messages

​Retrieve threads

​Retrieve messages

​Retrieve a subset of messages associated with a specific contact

​Get actors

​Update or restore threads

​Please note:

​Archive threads

​Add comments to threads

​Send messages to threads

​Include attachments in messages

​Webhooks

Please note:

Please note:

Scope requirements

Filter and sort results

Inboxes

Channels

Threads & messages

Retrieve threads

Retrieve messages

Retrieve a subset of messages associated with a specific contact

Get actors

Update or restore threads

Please note:

Archive threads

Add comments to threads

Send messages to threads

Include attachments in messages

Webhooks