Add Notion Comments from External Webhook Events
External events should spark discussion in Notion. Notis listens for incoming webhooks and adds comments to your pages automatically, surfacing important events where your team can discuss them.
Trigger
Webhook received
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Action
Create comment
Adds a comment to a notion page (via `parent page id`) or to an existing discussion thread (via `discussion id`); cannot create new discussion threads on specific blocks (inline comments).
Why this helps
External tools send notifications, but they don't reach Notion, so discussions don't happen where your work is tracked. Important events get lost in Slack/email instead of being discussed in context.
- External events trigger Notion discussions
- No missed important notifications
- Context-aware conversations
- Integrated feedback loops
Setup
Build it in a few focused steps.
- 1Connect Notion to Notis and identify the page where comments should land
- 2Create an automation: 'When you receive a webhook, add a comment to my Notion page with the event details'
- 3Notis generates a webhook URL and expected data format
- 4Test by sending a sample webhook; a comment should appear in Notion
Questions about this workflow
Can I format the comment with incoming data?
Yes. Specify: 'Create a comment with the event title as a header and the description as body.'
What if I want to mention someone in the comment?
Include in your prompt: 'Mention @[user name] in the comment if the event priority is high.'
Can comments be added to different pages based on the webhook data?
Yes. Add logic: 'If the event type is X, comment on Page A; if type is Y, comment on Page B.'
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Coda to Notion. A trigger fires from one place; an action lands in another.
Coda triggers
Notion actions
Coda Document Deleted Trigger
Triggers when a Coda document is deleted.
Add multiple content blocks (bulk, user-friendly)
Efficiently adds multiple standard content blocks to a notion page in a single api call with automatic markdown parsing. the 'content' field in notionrichtext blocks now automatically detects and parses markdown formatting including headers (# ## ###), bold (**text**), italic (*text*), strikethrough (~~text~~), inline code (`code`), links ([text](url)), and more. ideal for bulk content creation, ai agents, and replacing multiple individual add page content calls. supports automatic text formatting, content splitting, and up to 100 blocks per request.
New Coda Document Trigger
Triggers when a new Coda document is created.
Add content to Notion page
Deprecated: appends a single content block to a notion page or a parent block (must be page, toggle, to-do, bulleted/numbered list, callout, or quote); invoke repeatedly to add multiple blocks.
New Coda Page Trigger
Triggers when a new page is added to a Coda document.
Append complex blocks (advanced, full control)
Appends complex blocks with full notion block structure to a parent block or page. use for advanced scenarios requiring precise control: code blocks, tables, embeds, nested children within blocks, or when working with pre-built notion block objects. requires full notion api block schema - use add multiple page content for simpler content creation.
Specific Coda Page Updated Trigger
Triggers when a specific page within a Coda document is updated.
Archive Notion Page
Archives (moves to trash) or unarchives (restores from trash) a specified notion page.
Create comment
Adds a comment to a notion page (via `parent page id`) or to an existing discussion thread (via `discussion id`); cannot create new discussion threads on specific blocks (inline comments).
Create Notion Database
Creates a new notion database as a subpage under a specified parent page with a defined properties schema; use this action exclusively for creating new databases.
Create Notion page
Creates a new empty page in a notion workspace.
Delete a block
Archives a notion block, page, or database using its id, which sets its 'archived' property to true (like moving to "trash" in the ui) and allows it to be restored later.
Connect any two apps with Notis in the middle.
Not just Coda and Notion. Any combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
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