# Append Notion block children

Canonical URL: https://docs.fuse.init.inc/integrations/notion/actions/blocks.children.append

Append strict text blocks under a Notion block or page parent.

Action ID: `blocks.children.append`
Provider: Notion (`notion`)
Contract version: 1

## Risk and exposure

- Risk: Write
- Idempotency: Unsafe — Retries may duplicate side effects; callers must coordinate carefully.
- Availability: Default
- Exposure: REST, SDK, MCP
- MCP hints: readOnly=false, destructive=false, idempotent=false, openWorld=true

## Required scopes

- `insert_content`

## Input schema fields

- `block_id`
- `children`
- `children[]`
- `children[].type`
- `children[].rich_text`
- `children[].rich_text[]`
- `children[].rich_text[].type`
- `children[].rich_text[].text`
- `children[].rich_text[].text.content`
- `children[].rich_text[].text.link`
- `children[].rich_text[].text.link.url`
- `children[].rich_text[].annotations`
- `children[].rich_text[].annotations.bold`
- `children[].rich_text[].annotations.italic`
- `children[].rich_text[].annotations.strikethrough`
- `children[].rich_text[].annotations.underline`
- `children[].rich_text[].annotations.code`
- `children[].checked`
- `position`
- `position.type`
- `position.after_block`
- `position.after_block.id`

## Output schema fields

- `results`
- `results[]`
- `results[].id`
- `results[].type`
- `results[].has_children`
- `next_cursor`
- `has_more`

Provider overview: https://docs.fuse.init.inc/integrations/notion
Actions index: https://docs.fuse.init.inc/integrations/notion/actions
Exact canonical JSON contract: https://docs.fuse.init.inc/api/catalog/v1/providers/notion/actions/blocks.children.append
Deployment-effective discovery: https://api.fuse.init.inc/v1/tenants/%7Btenant_id%7D/providers/notion/actions