> ## Documentation Index
> Fetch the complete documentation index at: https://docs.linkupapi.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Comment on Post

> Add a comment to a post.

## Overview

Post a comment on a post. You can also comment as a company page by providing the `company_url` parameter.

<Note>This endpoint consumes **1 credit** per request. Ignore this if you're on per-seat pricing: usage is unlimited.</Note>

## Request

<ParamField header="x-api-key" type="string" required>
  Your API key for authentication.
</ParamField>

<ParamField body="account_id" type="string" required>
  The unique identifier of the account to use.
</ParamField>

<ParamField body="action" type="string" required>
  Must be `"comment"`.
</ParamField>

<ParamField body="params" type="object" required>
  <Expandable title="params properties">
    <ParamField body="post_url" type="string" required>
      The URL of the post to comment on, as shown on the connected platform.
    </ParamField>

    <ParamField body="comment_text" type="string" required>
      The text content of the comment. Also accepts `message` as an alias.
    </ParamField>

    <ParamField body="company_url" type="string">
      Optional. The URL of a company page to comment as. You must be an admin of the company page.
    </ParamField>
  </Expandable>
</ParamField>

## Response

<ResponseField name="success" type="boolean">
  Indicates whether the request was successful.
</ResponseField>

<ResponseField name="data" type="object">
  <Expandable title="data properties">
    <ResponseField name="commented" type="boolean">`true` when the comment was successfully posted.</ResponseField>
    <ResponseField name="post_url" type="string">The post URL that was commented on (echo of the input).</ResponseField>
    <ResponseField name="comment_text" type="string">The comment text that was posted (echo of the input).</ResponseField>
  </Expandable>
</ResponseField>

<ResponseField name="metadata" type="object">
  <Expandable title="metadata properties">
    <ResponseField name="action" type="string">
      The action that was performed (`"comment"`).
    </ResponseField>

    <ResponseField name="account_id" type="string">
      The account ID used for the request.
    </ResponseField>

    <ResponseField name="credits_consumed" type="integer">
      Number of credits consumed (1).
    </ResponseField>

    <ResponseField name="timestamp" type="string">
      ISO 8601 timestamp of the response.
    </ResponseField>
  </Expandable>
</ResponseField>

<ResponseExample>
  ```json 200 theme={null}
  {
    "success": true,
    "data": {
      "commented": true,
      "post_url": "https://www.linkedin.com/feed/update/urn:li:activity:7654321098765432100",
      "comment_text": "Great insights! Thanks for sharing."
    },
    "metadata": {
      "action": "comment",
      "account_id": "your-account-id",
      "credits_consumed": 1,
      "timestamp": "2026-04-26T10:35:00Z"
    }
  }
  ```

  ```json 400 theme={null}
  {
    "success": false,
    "error": {
      "code": "INVALID_PARAMS",
      "message": "post_url and comment_text are required."
    },
    "metadata": {
      "action": "comment",
      "account_id": "your-account-id",
      "credits_consumed": 0,
      "timestamp": "2026-03-24T12:00:00Z"
    }
  }
  ```
</ResponseExample>