HubSpot: Create message

HubSpot conversations.createMessage: arguments, response, policy and SDK examples.

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Operation hubspot.conversations_create_message

Provider route: POST /conversations/conversations/2026-09/threads/{threadId}/messages. Alter supplies the connection’s credentials and routing.

Call through Alter

Install @alter-ai/sdk @alter-ai/hubspot with npm, or alter-sdk-hubspot with pip. Supply your connected customer’s grant ID and the arguments described below.

import { App } from "@alter-ai/sdk";
import { HubSpotIntegration } from "@alter-ai/hubspot";

async function execute(input: Parameters<HubSpotIntegration["conversations"]["createMessage"]>[0]) {
  const app = new App({ apiKey: process.env.ALTER_API_KEY! });
  try {
    const provider = new HubSpotIntegration(app, { grantId: process.env.PROVIDER_GRANT_ID! });
    const call = await provider.conversations.createMessage(input);
    const result = await call.wait();
    return result.bodyJson();
  } finally {
    await app.close();
  }
}

import os
from alter_sdk import App
from alter_sdk_hubspot import HubSpotIntegration

async def execute(arguments):
    async with App(api_key=os.environ["ALTER_API_KEY"]) as app:
        provider = HubSpotIntegration(app, {"grant_id": os.environ["PROVIDER_GRANT_ID"]})
        call = await provider.conversations.create_message(arguments)
        result = await call.wait()
        return result.body_json()

Input

Field	Type	Presence	Description and constraints
`$`	object	Root	Additional keys: not allowed
`path`	object	Required within parent	Additional keys: not allowed
`path.threadId`	integer	Required within parent	Format: int64
`body`	Model	Required within parent	Expand Create message — request body — body

Referenced models: Create message — request body — body

Response

Response media type: application/json. The table describes the pinned successful response. Referenced models link to their complete fields.

Field	Type	Presence	Description and constraints
`$`	Model	Root	Expand Create message — response body

Referenced models: Create message — response body

Schemas

36 more schemas are linked from the tables above, on the schema pages.

Create message — response body

Field	Type	Presence	Description and constraints
`$`	JSON	Root
`$ (anyOf 1)`	Model	Alternative	Expand Create message — response body — direction: INCOMING, OUTGOING, truncation Status: NOT TRUNCATED, TRUNCATED, TRUNCATED TO MOST RECENT REPLY, type: MESSAGE
`$ (anyOf 2)`	Model	Alternative	Expand Create message — response body — type: COMMENT
`$ (anyOf 3)`	Model	Alternative	Expand Create message — response body — type: WELCOME MESSAGE
`$ (anyOf 4)`	Model	Alternative	Expand Create message — response body — type: ASSIGNMENT
`$ (anyOf 5)`	Model	Alternative	Expand Create message — response body — newStatus: CLOSED, OPEN, type: THREAD STATUS CHANGE
`$ (anyOf 6)`	Model	Alternative	Expand Create message — response body — type: THREAD INBOX CHANGE

Referenced models: Create message — response body — direction: INCOMING, OUTGOING, truncation Status: NOT TRUNCATED, TRUNCATED, TRUNCATED TO MOST RECENT REPLY, type: MESSAGE, Create message — response body — type: ASSIGNMENT, Create message — response body — type: COMMENT, Create message — response body — type: THREAD INBOX CHANGE, Create message — response body — newStatus: CLOSED, OPEN, type: THREAD STATUS CHANGE, Create message — response body — type: WELCOME MESSAGE

Create message — request body — body

Field	Type	Presence	Description and constraints
`$`	JSON	Root
`$ (oneOf 1)`	Model	Alternative	Expand Create message — request body — body / type: MESSAGE
`$ (oneOf 2)`	Model	Alternative	Expand Create message — request body — body / type: COMMENT

Referenced models: Create message — request body — body / type: COMMENT, Create message — request body — body / type: MESSAGE

Create message — response body — direction: INCOMING, OUTGOING, truncation Status: NOT TRUNCATED, TRUNCATED, TRUNCATED TO MOST RECENT REPLY, type: MESSAGE

Field	Type	Presence	Description and constraints
`$`	object	Root
`archived`	boolean	Required within parent	A boolean indicating whether this message is archived.
`attachments`	array	Required within parent	An array of attachments included with this message, which can be of various types such as files, locations, or social media metadata.
`attachments[]`	JSON	Each item
`attachments[] (anyOf 1)`	Model	Alternative	Expand Create message — response body — type: COMMENT attachments item file Usage Type: AUDIO, IMAGE, OTHER, STICKER, VOICE RECORDING, type: FILE
`attachments[] (anyOf 2)`	Model	Alternative	Expand Create message — response body — type: COMMENT attachments item type: LOCATION
`attachments[] (anyOf 3)`	Model	Alternative	Expand Create message — response body — type: COMMENT attachments item type: CONTACT
`attachments[] (anyOf 4)`	Model	Alternative	Expand Create message — response body — type: COMMENT attachments item type: UNSUPPORTED CONTENT
`attachments[] (anyOf 5)`	Model	Alternative	Expand Create message — response body — type: COMMENT attachments item type: MESSAGE HEADER
`attachments[] (anyOf 6)`	Model	Alternative	Expand Create message — response body — type: COMMENT attachments item type: QUICK REPLIES
`attachments[] (anyOf 7)`	Model	Alternative	Expand Create message — response body — type: COMMENT attachments item type: WHATSAPP TEMPLATE METADATA
`attachments[] (anyOf 8)`	Model	Alternative	Expand Create message — response body — type: COMMENT attachments item type: SOCIAL MEDIA METADATA
`channelAccountId`	string	Required within parent	The identifier of the channel account associated with this message.
`channelId`	string	Required within parent	The identifier of the channel through which this message was sent.
`client`	Model	Required within parent	Expand Create message — response body — type: COMMENT client
`conversationsThreadId`	string	Required within parent	The identifier of the conversation thread to which this message belongs.
`createdAt`	string	Required within parent	The date and time when this message was created, in ISO 8601 format. Format: date-time
`createdBy`	string	Required within parent	The identifier of the actor who created this message.
`direction`	string	Required within parent	The direction of the message, indicating whether it is 'INCOMING' or 'OUTGOING'. Known values: INCOMING, OUTGOING
`id`	string	Required within parent	The unique identifier for this message.
`inReplyToId`	string	Optional	The identifier of the message to which this message is a reply, if applicable.
`recipients`	array	Required within parent	An array of recipients of this message, each represented as a PublicRecipient object.
`recipients[]`	Model	Each item	Expand Create message — response body — type: COMMENT recipients item
`richText`	string	Optional	The rich text content of the message, which may include formatting.
`senders`	array	Required within parent	An array of senders involved in this message, each represented as a PublicSender object.
`senders[]`	Model	Each item	Expand Create message — response body — type: COMMENT senders item
`status`	Model	Optional	Expand Create message — response body — direction: INCOMING, OUTGOING, truncation Status: NOT TRUNCATED, TRUNCATED, TRUNCATED TO MOST RECENT REPLY, type: MESSAGE status
`subject`	string	Optional	The subject of the message, if applicable.
`text`	string	Required within parent	The plain text content of the message.
`truncationStatus`	string	Required within parent	Indicates the truncation status of the message content, with possible values being 'NOT_TRUNCATED', 'TRUNCATED_TO_MOST_RECENT_REPLY', or 'TRUNCATED'. Known values: NOT_TRUNCATED, TRUNCATED, TRUNCATED_TO_MOST_RECENT_REPLY
`type`	string	Required within parent	The type of the message, which is always 'MESSAGE'. Known values: MESSAGE Default: MESSAGE
`updatedAt`	string	Optional	The date and time when this message was last updated, in ISO 8601 format. Format: date-time

Create message — response body — type: COMMENT client

Field	Type	Presence	Description and constraints
`$`	object	Root
`clientType`	string	Required within parent	The type of client interacting with the API. Valid values include 'HUBSPOT', 'SYSTEM', 'INTEGRATION', and 'UNKNOWN'. Known values: HUBSPOT, INTEGRATION, SYSTEM, UNKNOWN
`integrationAppId`	JSON	Optional
`integrationAppId (anyOf 1)`	integer	Alternative	An optional identifier for the integration application associated with the client. It is an integer value. Format: int32
`integrationAppId (anyOf 2)`	string	Alternative	Pattern: ^-?[0-9]+(?:\.[0-9]+)?(?:[eE][+-]?[0-9]+)?$

Policy, approvals and errors

SDK function policy ID: hubspot.conversations_create_message. Catalog operation: conversations_create_message. Rules can name either ID; function rules distinguish managed calls and conservatively cover raw calls sharing the route. Existing grant permissions and policy rules apply. wait() returns an immediate result or waits for a required approval; it never approves the request itself. Persist the approval ID to resume after a restart.

Provider errors retain their response; JSON decoding raises ProviderAPIError for provider failures. ManagedOperationError identifies contract/input/retention errors. See error handling and provider-specific behavior. Sensitive input may be refused before approval storage. A decoding error never resubmits a write.

Required provider scopes: ["conversations.write"]

Official provider source

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