A Notion API client library for Kotlin and Java.

This library is written in Kotlin Multiplatform and can be used from the JVM (Kotlin and Java), Android, and MacOS native.

Several flavors of the client are available to match your needs:

• Coroutines ( suspend) based: the default client for Kotlin projects
• Blocking: useful for Java projects, or if you have your own async mechanism
• Future based (JVM only): useful for Java projects

The artifact is hosted on the Maven Central repository.

dependencies {
    implementation("org.jraf:klibnotion:2.0.0")
}

The easiest way to see how to use it is to look at the samples:

• Coroutines (Kotlin)
• Blocking (Java)
• Future (Java)

You can also explore the reference doc.

You will find your Internal Integration Token by following the instructions here.

val notionClient = NotionClient.newInstance(
    ClientConfiguration(
        Authentication(TOKEN)
    )
)

To get other flavors of the client (Java):

• Blocking: BlockingNotionClient blockingClient = BlockingNotionClientUtils.asBlockingNotionClient(notionClient);
• Future: FutureNotionClient futureClient = FutureNotionClientUtils.asFutureNotionClient(notionClient);

The client gives access to several API areas:

• oAuth
• users
• databases
• pages
• blocks

Each area exposes related APIs, for instance: notionClient.pages.getPage.

The APIs that are paginated all follow the same principle:

• take a Pagination object as a parameter, which defines the page to retrieve
• return a ResultPage<T> with the result list but also a reference to the next Pagination objects (handy when retrieving several pages).

A small DSL is available on the page creation API, here's an example usage:

heading1("First section") paragraph("Hello, World!") heading1("Second section") paragraph("This paragraph is bold", annotations = Annotations.BOLD) { paragraph("Sub paragraph 1") paragraph("Sub paragraph 2") { paragraph("Sub sub paragraph") { } } } heading2("But then again") heading3("Actually") paragraph("That's the case") heading3("But really") paragraph(RichTextList().text("This ") .text("word", Annotations(color = Color.RED)) .text(" is red")) bullet("There's this,") bullet("there's that,") bullet("then there's...") { paragraph("Will this work?") } bullet("indentation?") { bullet("indentation? 2") { bullet("indentation? 3") } } number("First") number("Second") { number("Second second") } number("Third") toDo("This one is checked", true) toDo("This one is not checked", false) toggle("This is a toggle!") { paragraph("This first paragraph is inside the toggle") paragraph("This second paragraph is inside the toggle") heading3("This too!") }

1. Build your NotionClient with a null Authentication.
2. Use oAuth.getUserPromptUri to get a URI that will prompt users to agree to add your integration to their workspace
3. After agreeing and upon success, they will be redirected to a specific URI containing a code. Use oAuth.extractCodeAndStateFromRedirectUri to extract the code from this URI.
4. Exchange the code for an access token using oAuth.getAccessToken
5. The NotionClient is updated with the token so you can now make authenticated calls. Securely save the token so you can pass it to the authentication next time you build your NotionClient.

See the sample for a working example.

To log HTTP requests/response, pass a HttpConfiguration to NotionClient.newInstance().

Several levels are available: NONE, INFO, HEADERS, BODY and ALL

A proxy can be configured by passing a HttpConfiguration to NotionClient.newInstance().

• This library uses the 2026-03-11 version of the Notion API.
• The Notion API is still evolving and there may be some changes that have not been implemented by this library yet.
• Development on this library is not very active, however, pull requests are very welcome, and new versions will be published as needed.
• If you want to contribute, it is recommended you first try an issue with the "good first issue" label.

Note: this project is not officially related to or endorsed by Notion.

Copyright (C) 2021-present Benoit 'BoD' Lubek (BoD@JRAF.org)
and contributors (https://github.com/BoD/klibnotion/graphs/contributors)

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.