Creating a page in Notion

[Lyndall_Lohman]

What is your goal?

I’m building a scenario that watches a Slack channel for messages (varying structures), creates a new Notion database item, and then appends the structured blocks to that page as formatted content (headings and paragraphs).

What is the problem & what have you tried?

I cannot get any content into the body of a Notion page. Every approach I’ve tried either throws an IMLError or a Notion API validation error. The Notion “Append a Page Content” module consistently fails regardless of how the input is formatted. What have I tried?

Notion Append a Page Content with Paragraph type and plain text mapped from Slack — IMLError
Notion Append a Page Content with Paragraph type and sanitised text via Tools Set Variable — same IMLError
Notion Create a Page with Content Objects mapped as array — same IMLError
HTTP module with raw JSON body — InvalidConfigurationError (bad control characters from newlines)
HTTP module with JSON string method — Notion API 400 validation error
OpenAI to output blocks in custom JSON format, parsed via JSON module, mapped into Append — same IMLError

Error messages or input/output bundles

Error messages:
IMLError: Function ‘children’ finished with error!
item[item.type].rich_text.forEach is not a function
RuntimeError [400]: body.children[0].paragraph should be defined,
instead was undefined
Input/Output:
The JSON Parse module outputs a perfectly structured bundle with a title string and blocks array containing type and text keys. The Page ID from the Create Database Item module is correctly mapped into the Append module’s Page ID field.

Screenshots (scenario flow, module settings, errors)

[mszymkowiak]

Hello,

Could you generate an example of the body you would like to pass without confidential data? It looks like you have errors with your data structure.

Please refer to the Notion API docs to better understand the schema used by Notion.

Append block children - Notion Docs