效率

Notion Mentioned To-Dos to Slack DM

Send a daily Slack direct message for each unchecked Notion to-do mentioning a selected user.

Setup

Connect Notion in Read Notion child blocks and set the parent block or page ID. The integration needs access to its direct children. In Collect matching to-dos, set the Notion user ID; in Open a Slack direct message, connect Slack and set the recipient Slack user ID. The two IDs refer to the same person on different services. In n8n set the parent ID in Get To Dos, the Notion user ID in Filter to-dos, and the Slack user ID in Create a Direct Message, then connect both credentials. Enable one format only.

Both formats start at 08:00 UTC each day. The original used the n8n instance timezone; check the schedule and timezone before enabling it. The n8n Cron V1 uses a fixed randomized second, while Open Flow runs on the minute boundary.

Behavior

The workflow reads all pages of direct child blocks. It selects unchecked to-do blocks whose second rich-text element mentions the configured Notion user, and uses the first text element as the task title. It opens a Slack DM for each match, then sends one message per task in the same order. No matches means no message. Nested child blocks are not searched. A mention is not a separate assignment field.

A read error stops before Slack. Open Flow also stops on an incomplete page or repeated pagination cursor; n8n uses the native Notion node’s pagination. A later Slack error stops the remaining operations; earlier opens or messages may already have succeeded. Check Slack before rerunning after an uncertain write. Very large sets must fit the execution platform’s state limits; oversized task titles stop the run before messages.

Inspiration & credits

Changes to the source

Use Notion’s current rich-text format and a stable mentioned user ID instead of a display name; upgrade the n8n Notion node to version 2. Replace private IDs with configuration.
Explicitly paginate and keep each title associated with its direct message; validate responses and use UTC as the schedule starting point.

Adapted from Check To Do on Notion and send message on Slack in Zie619/n8n-workflows. The matching n8n community listing credits Harshil Agrawal. The original template does not state a separate license.

The collection’s MIT notice is pinned at a later revision. This is the collection notice at that revision; it does not establish a separate original template author’s license. Our changes are listed above; see repository licensing.

MIT License

Copyright (c) 2025 Zie619

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.