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:

Concept	Use For
Database	Creating databases, getting data source IDs
Data Source	Querying, updating schema, updating properties

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

Status	Meaning
400	Missing Notion connection
401	Invalid or missing Maton API key
429	Rate limited (10 req/sec per account)
4xx/5xx	Passthrough error from Notion API

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