How to Auto-Summarize Notion Meeting Notes With an AI Script

Long meeting notes are useful only if someone reads them. This guide builds a small Node script that fetches a Notion page, sends the text to Claude for a tight summary with action items, and appends the summary back onto the same page. It assumes you already have a Notion token and a Claude API key.

• Node 18 or newer
• A Notion integration token shared with the page
• An Anthropic API key for Claude
• The page id of a meeting notes page

Step 1: Install the SDKs

Use the official clients for both services so you do not hand-roll request signing. Initialize a project first if you do not have one.

Step 2: Read the page text from Notion

Notion stores page content as blocks. List the children of the page and flatten the paragraph and heading text into a single string you can hand to the model.

import { Client } from "@notionhq/client";
import Anthropic from "@anthropic-ai/sdk";

const notion = new Client({ auth: process.env.NOTION_TOKEN });
const claude = new Anthropic({ apiKey: process.env.ANTHROPIC_API_KEY });
const pageId = process.env.NOTION_PAGE_ID;

const { results } = await notion.blocks.children.list({ block_id: pageId });
const text = results
  .flatMap((b) => b[b.type]?.rich_text ?? [])
  .map((t) => t.plain_text)
  .join("\n");

Step 3: Ask Claude for a summary

Send the flattened text to the Messages API with a clear instruction. Asking for a fixed shape, such as a short paragraph plus bullet action items, makes the output easy to write back cleanly.

const msg = await claude.messages.create({
  model: "claude-sonnet-4-5",
  max_tokens: 600,
  messages: [
    {
      role: "user",
      content:
        "Summarize these meeting notes in 3 sentences, then list action items as bullets:\n\n" +
        text,
    },
  ],
});
const summary = msg.content[0].text;

Step 4: Write the summary back to Notion

Append a heading and a paragraph block to the same page so the summary lives next to the raw notes. Run the script and the page updates in place.

await notion.blocks.children.append({
  block_id: pageId,
  children: [
    {
      heading_2: { rich_text: [{ text: { content: "AI Summary" } }] },
      type: "heading_2",
      object: "block",
    },
    {
      paragraph: { rich_text: [{ text: { content: summary } }] },
      type: "paragraph",
      object: "block",
    },
  ],
});
console.log("Summary written to page.");

Result: every time you run the script, the chosen page gains a fresh AI Summary section. Schedule it after recurring meetings and your notes stay readable with zero manual effort.