Notion

Notion

Access the Notion API with managed OAuth authentication. Query databases, create pages, manage blocks, and search your workspace.

Quick Start

# Search for pages
python <<'EOF'
import urllib.request, os, json
data = json.dumps({'query': 'meeting notes'}).encode()
req = urllib.request.Request('https://gateway.maton.ai/notion/v1/search', data=data, method='POST')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
req.add_header('Content-Type', 'application/json')
req.add_header('Notion-Version', '2025-09-03')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Base URL

https://gateway.maton.ai/notion/{native-api-path}

Replace {native-api-path} with the actual Notion API endpoint path. The gateway proxies requests to api.notion.com and automatically injects your OAuth token.

Required Headers

All Notion API requests require the version header:

Notion-Version: 2025-09-03

Authentication

All requests require the Maton API key in the Authorization header:

Authorization: Bearer $MATON_API_KEY

Environment Variable: Set your API key as MATON_API_KEY:

export MATON_API_KEY="YOUR_API_KEY"

Getting Your API Key

1. Sign in or create an account at maton.ai
2. Go to maton.ai/settings
3. Copy your API key

Connection Management

Manage your Notion OAuth connections at https://ctrl.maton.ai.

List Connections

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://ctrl.maton.ai/connections?app=notion&status=ACTIVE')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Create Connection

python <<'EOF'
import urllib.request, os, json
data = json.dumps({'app': 'notion'}).encode()
req = urllib.request.Request('https://ctrl.maton.ai/connections', data=data, method='POST')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
req.add_header('Content-Type', 'application/json')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Get Connection

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://ctrl.maton.ai/connections/{connection_id}')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Response:

{
  "connection": {
    "connection_id": "21fd90f9-5935-43cd-b6c8-bde9d915ca80",
    "status": "ACTIVE",
    "creation_time": "2025-12-08T07:20:53.488460Z",
    "last_updated_time": "2026-01-31T20:03:32.593153Z",
    "url": "https://connect.maton.ai/?session_token=...",
    "app": "notion",
    "metadata": {}
  }
}

Open the returned url in a browser to complete OAuth authorization.

Delete Connection

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://ctrl.maton.ai/connections/{connection_id}', method='DELETE')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Specifying Connection

If you have multiple Notion connections, specify which one to use with the Maton-Connection header:

python <<'EOF'
import urllib.request, os, json
data = json.dumps({'query': 'meeting notes'}).encode()
req = urllib.request.Request('https://gateway.maton.ai/notion/v1/search', data=data, method='POST')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
req.add_header('Content-Type', 'application/json')
req.add_header('Notion-Version', '2025-09-03')
req.add_header('Maton-Connection', '21fd90f9-5935-43cd-b6c8-bde9d915ca80')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

If omitted, the gateway uses the default (oldest) active connection.

Key Concept: Databases vs Data Sources

In API version 2025-09-03, databases and data sources are separate:

Use GET /databases/{id} to get the data_sources array, then use /data_sources/ endpoints:

{
  "object": "database",
  "id": "abc123",
  "data_sources": [
    {"id": "def456", "name": "My Database"}
  ]
}

API Reference

Search

Search for pages:

POST /notion/v1/search
Content-Type: application/json
Notion-Version: 2025-09-03

{
  "query": "meeting notes",
  "filter": {"property": "object", "value": "page"}
}

Search for data sources:

POST /notion/v1/search
Content-Type: application/json
Notion-Version: 2025-09-03

{
  "filter": {"property": "object", "value": "data_source"}
}

Data Sources

Get Data Source

GET /notion/v1/data_sources/{dataSourceId}
Notion-Version: 2025-09-03

Query Data Source

POST /notion/v1/data_sources/{dataSourceId}/query
Content-Type: application/json
Notion-Version: 2025-09-03

{
  "filter": {
    "property": "Status",
    "select": {"equals": "Active"}
  },
  "sorts": [
    {"property": "Created", "direction": "descending"}
  ],
  "page_size": 100
}

Update Data Source

PATCH /notion/v1/data_sources/{dataSourceId}
Content-Type: application/json
Notion-Version: 2025-09-03

{
  "title": [{"type": "text", "text": {"content": "Updated Title"}}],
  "properties": {
    "NewColumn": {"rich_text": {}}
  }
}

Databases

Get Database

GET /notion/v1/databases/{databaseId}
Notion-Version: 2025-09-03

Create Database

POST /notion/v1/databases
Content-Type: application/json
Notion-Version: 2025-09-03

{
  "parent": {"type": "page_id", "page_id": "PARENT_PAGE_ID"},
  "title": [{"type": "text", "text": {"content": "New Database"}}],
  "properties": {
    "Name": {"title": {}},
    "Status": {"select": {"options": [{"name": "Active"}, {"name": "Done"}]}}
  }
}

Pages

Get Page

GET /notion/v1/pages/{pageId}
Notion-Version: 2025-09-03

Create Page

POST /notion/v1/pages
Content-Type: application/json
Notion-Version: 2025-09-03

{
  "parent": {"page_id": "PARENT_PAGE_ID"},
  "properties": {
    "title": {"title": [{"text": {"content": "New Page"}}]}
  }
}

Create Page in Data Source

POST /notion/v1/pages
Content-Type: application/json
Notion-Version: 2025-09-03

{
  "parent": {"data_source_id": "DATA_SOURCE_ID"},
  "properties": {
    "Name": {"title": [{"text": {"content": "New Page"}}]},
    "Status": {"select": {"name": "Active"}}
  }
}

Update Page Properties

PATCH /notion/v1/pages/{pageId}
Content-Type: application/json
Notion-Version: 2025-09-03

{
  "properties": {
    "Status": {"select": {"name": "Done"}}
  }
}

Update Page Icon

PATCH /notion/v1/pages/{pageId}
Content-Type: application/json
Notion-Version: 2025-09-03

{
  "icon": {"type": "emoji", "emoji": "🚀"}
}

Archive Page

PATCH /notion/v1/pages/{pageId}
Content-Type: application/json
Notion-Version: 2025-09-03

{
  "archived": true
}

Blocks

Get Block Children

GET /notion/v1/blocks/{blockId}/children
Notion-Version: 2025-09-03

Append Block Children

PATCH /notion/v1/blocks/{blockId}/children
Content-Type: application/json
Notion-Version: 2025-09-03

{
  "children": [
    {
      "object": "block",
      "type": "paragraph",
      "paragraph": {
        "rich_text": [{"type": "text", "text": {"content": "New paragraph"}}]
      }
    }
  ]
}

Delete Block

DELETE /notion/v1/blocks/{blockId}
Notion-Version: 2025-09-03

Users

List Users

GET /notion/v1/users
Notion-Version: 2025-09-03

Get Current User

GET /notion/v1/users/me
Notion-Version: 2025-09-03

Filter Operators

• equals, does_not_equal
• contains, does_not_contain
• starts_with, ends_with
• is_empty, is_not_empty
• greater_than, less_than

Block Types

• paragraph, heading_1, heading_2, heading_3
• bulleted_list_item, numbered_list_item
• to_do, code, quote, divider

Code Examples

JavaScript

const response = await fetch('https://gateway.maton.ai/notion/v1/search', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'Authorization': `Bearer ${process.env.MATON_API_KEY}`,
    'Notion-Version': '2025-09-03'
  },
  body: JSON.stringify({ query: 'meeting' })
});

Python

import os
import requests

response = requests.post(
    'https://gateway.maton.ai/notion/v1/search',
    headers={
        'Authorization': f'Bearer {os.environ["MATON_API_KEY"]}',
        'Notion-Version': '2025-09-03'
    },
    json={'query': 'meeting'}
)

Notes

• All IDs are UUIDs (with or without hyphens)
• Use GET /databases/{id} to get the data_sources array containing data source IDs
• Creating databases requires POST /databases endpoint
• Delete blocks returns the block with archived: true
• IMPORTANT: When using curl commands, use curl -g when URLs contain brackets (fields[], sort[], records[]) to disable glob parsing
• IMPORTANT: When piping curl output to jq or other commands, environment variables like $MATON_API_KEY may not expand correctly in some shell environments. You may get "Invalid API key" errors when piping.

Error Handling

Troubleshooting: Invalid API Key

When you receive a "Invalid API key" error, ALWAYS follow these steps before concluding there is an issue:

1. Check that the MATON_API_KEY environment variable is set:

echo $MATON_API_KEY

2. Verify the API key is valid by listing connections:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://ctrl.maton.ai/connections')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Resources

• Notion API Introduction
• Search
• Query Database
• Get Page
• Create Page
• Update Page
• Append Block Children
• Filter Reference
• LLM Reference