How to Create Reply Messages with the ClickUp API

This guide explains how to use the ClickUp public API to create reply messages in chat views, so you can extend ClickUp with custom integrations, bots, or automation workflows.

You will learn the required endpoint, headers, request body, and permission scopes, along with practical examples you can adapt for your own applications.

Understanding the ClickUp reply message endpoint

The ClickUp API provides a dedicated endpoint to create a reply to an existing chat message. A reply is always associated with a parent chat message and a specific chat view.

The endpoint used is:

POST /v2/view/chat/<chat_id>/message/<message_id>/reply

Where:

• chat_id: The unique identifier of the chat view.
• message_id: The unique identifier of the parent message you are replying to.

This operation is available in the public API and is intended for server-side or backend integrations that work with ClickUp workspaces.

Prerequisites for using the ClickUp reply API

Before sending requests to the reply message endpoint, ensure you have the following prerequisites in place.

Required ClickUp authorization

Every request to the reply endpoint must include a valid personal token, team token, or OAuth 2.0 access token issued by ClickUp. The token must be passed in the Authorization header.

• Header name: Authorization
• Header value: your token string (no prefix required unless your environment adds it)

The token must belong to a user or app that has access to the target workspace, chat view, and message.

Required ClickUp scopes

When using OAuth 2.0, your app must request the correct scopes to create reply messages. The endpoint requires:

• view:write

Without this scope, the ClickUp API will reject attempts to create replies.

ClickUp reply message endpoint details

The reply endpoint follows standard REST conventions used across the ClickUp platform. It accepts a JSON request body and returns a JSON representation of the newly created reply message.

HTTP method and URL structure

Use an HTTPS POST request with the base URL of the ClickUp API, then append the endpoint path. In generic form:

POST https://api.clickup.com/api/v2/view/chat/{chat_id}/message/{message_id}/reply

Replace {chat_id} and {message_id} with real identifiers from your ClickUp workspace.

Required headers for ClickUp requests

At minimum, include the following headers:

• Authorization: Your ClickUp API token.
• Content-Type: application/json

Depending on your HTTP client, you may also add Accept: application/json for clarity.

Building the request body for a ClickUp reply

The request body determines what content appears in the reply message. The API expects a JSON object with fields that describe the message text and optional metadata.

Core JSON fields

According to the reference, the reply endpoint accepts a set of fields documented on the source page. Common fields for a message-based endpoint typically include:

• content: The main text of the reply message.
• attachments (optional): A list of attachment objects, if supported by the chat view.
• mentions (optional): User or entity mentions, when supported by the message format.

Always confirm the exact and complete set of available properties, required fields, and value formats on the official reference page here: ClickUp create reply message API.

Sample JSON payload

The following is an illustrative example of a minimal JSON request body. Adapt it to the properties defined in the official ClickUp documentation:

{
  "content": "This is a reply from our integration.",
  "attachments": [],
  "mentions": []
}

Only include fields that are allowed by the ClickUp reply message schema described on the source page.

Step-by-step: send a ClickUp reply message

Follow these steps to reliably send a reply message using the ClickUp API:

1. Collect identifiers from ClickUp

Gather the identifiers you need:

1. Find the chat_id for the chat view.
2. Find the message_id of the message you want to reply to.
3. Verify that the user or app token has access to the same workspace and chat.

2. Prepare your ClickUp token

Confirm that you have a valid:

• Personal or team API token, or
• OAuth 2.0 access token with the view:write scope.

Store the token securely and do not expose it in client-side code or public repositories.

3. Build the request

Create an HTTP POST request including:

• The full URL with chat_id and message_id.
• Authorization header with your ClickUp token.
• Content-Type: application/json header.
• A JSON body that follows the schema defined in the ClickUp API reference.

4. Send the request and handle the response

After sending the request:

• On success, the response returns a JSON object describing the new reply message, including its unique identifier and metadata.
• Use the returned ID if you plan to edit, delete, or track the reply later.

Log responses and errors so you can troubleshoot integration issues more easily.

Handling ClickUp errors and edge cases

The reply endpoint may return error responses when something goes wrong. Common causes include invalid tokens, missing scopes, or incorrect identifiers.

Typical ClickUp API problems

• Authentication errors: Occur when the Authorization header is missing, expired, or invalid.
• Permission issues: Happen when your app is missing the view:write scope or the user does not have access to the chat view.
• Not found errors: Returned when the chat_id or message_id does not exist or is outside the workspace associated with your token.
• Validation errors: Triggered if required fields are missing from the JSON body or values do not match the expected format.

Review the HTTP status code and error message from ClickUp to identify the root cause and update your request accordingly.

Best practices for integrating ClickUp replies

When integrating this endpoint into your systems, follow these practical guidelines.

Secure your ClickUp credentials

Use environment variables or a secure configuration store to manage tokens. Rotate tokens periodically and never embed them directly in public codebases.

Respect ClickUp rate limits

If your integration sends a large number of replies, implement retry logic and backoff strategies to handle any rate limiting enforced by ClickUp.

Log and monitor ClickUp API calls

Monitor error rates, latency, and payload patterns so you can quickly respond when the reply endpoint behavior changes or when your integration encounters issues.

Next steps and additional ClickUp resources

To explore more advanced message options, supported fields, and up-to-date examples, always refer to the official ClickUp documentation for the reply message endpoint:

Official ClickUp create reply message reference

If you need consulting or implementation support for complex API projects, automation, or AI-powered workflows around ClickUp, you can find expert services at Consultevo.

By following the steps and best practices outlined here, you can reliably create reply messages via the ClickUp API and integrate chat-based collaboration deeply into your own applications and workflows.

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