Create a page in a data source

curl --fail-with-body https://api.notion.com/v1/pages \
  -H "Authorization: Bearer $NOTION_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Notion-Version: 2026-03-11" \
  --data "{
    \"parent\": { \"data_source_id\": \"$NOTION_DATA_SOURCE_ID\" },
    \"properties\": {
      \"Grocery item\": { \"title\": [{ \"text\": { \"content\": \"Tomatoes\" } }] },
      \"Price\": { \"number\": 1.49 },
      \"Last ordered\": { \"date\": { \"start\": \"2026-09-01\" } }
    }
  }"

import { Client } from "@notionhq/client";

async function main() {
  const token = process.env.NOTION_API_KEY;
  const dataSourceId = process.env.NOTION_DATA_SOURCE_ID;
  if (!token || !dataSourceId) {
    throw new Error("Set NOTION_API_KEY and NOTION_DATA_SOURCE_ID.");
  }

  const notion = new Client({ auth: token });
  const dataSource = await notion.dataSources.retrieve({
    data_source_id: dataSourceId,
  });
  if (!("properties" in dataSource)) {
    throw new Error("The data source response has no schema. Check access.");
  }

  const expectedTypes = {
    "Grocery item": "title",
    Price: "number",
    "Last ordered": "date",
  };
  for (const [name, type] of Object.entries(expectedTypes)) {
    if (dataSource.properties[name]?.type !== type) {
      throw new Error(`Expected a ${type} property named ${name}. Check the schema.`);
    }
  }

  const page = await notion.pages.create({
    parent: { data_source_id: dataSourceId },
    properties: {
      "Grocery item": { title: [{ text: { content: "Tomatoes" } }] },
      Price: { number: 1.49 },
      "Last ordered": { date: { start: "2026-09-01" } },
    },
  });
  console.log("Created page:", page.id);
}

main().catch((error) => {
  console.error(error instanceof Error ? error.message : "Could not create the page.");
  process.exitCode = 1;
});