A straightforward solution for using the AT Protocol and Bluesky, written in Swift.

ATProtoKit is an easy-to-understand API library that leverages the AT Protocol with the type-safety and ease-of-use you’ve come to expect with the Swift programming language. Whether you’re building a bot, a server app, or just another user-facing Bluesky client, this project should hopefully get you up to speed.

let config = ATProtocolConfiguration(handle: "lucy.bsky.social", appPassword: "hunter2")

Task {
    print("Starting application...")

    do {
        let session = try await config.authenticate()

        let atProto = ATProtoKit(session: session)
        let atProtoBluesky = ATProtoBluesky(atProtoKitInstance: atProto)

        let postResult = try await atProtoBluesky.createPostRecord(text: "Hello Bluesky!")

        print(postResult)
    } catch {
        print("Error: \(error)")
    }
}

I believe Bluesky and its accompanying AT Protocol gives the perfect balance between embracing decentralization and simplifying the user experience. Because of this, I wanted a way for Swift developers to use the AT Protocol in a way that feels right at home, both client-side with Apple's platforms, and server-side with Linux. For this reason, I decided to open source this project.

• Full compatibility with Apple’s APIs for each of the platforms.
• Written with adherence to the Swift API Design Guidelines.
• Well-written documentation for all of the AT Protocol and Bluesky APIs.
• A RichText helper to parse text into the applicable facets.
• Easily identify and validate different identifiers.
• A powerful Firehose API that retrieves and filters events and records in real-time.
• An HTML-parsing system to grab search engine-friendly elements for embeds.
• A logging tool for easy debugging.

You can use the Swift Package Manager to download and import the library into your project:

dependencies: [
    .package(url: "https://github.com/MasterJ93/ATProtoKit.git", from: "0.19.0")
]

Then under targets:

targets: [
    .target(
        // name: ...,
        dependencies: [
            .product(name: "ATProtoKit", package: "atprotokit")
        ]
    )
]

The Projects page isn't completed, but you can still view it through its Projects page.

As shown in the Example Usage, it all starts with ATProtocolConfiguration, which uses the handle, app password, and pdsURL to access and create a session:

import ATProtoKit

let config = ATProtocolConfiguration(handle: "lucy.bsky.social", appPassword: "hunter2")

By default, ATProtocolConfiguration conforms to https://bsky.social. However, if you’re using a different distributed service, you can specify the URL:

let result = ATProtocolConfiguration(handle: "lucy.example.social", appPassword: "hunter2", pdsURL: "https://example.social")

This session contains all of the elements you need, such as the access and refresh tokens:

Task {
    do {
        let session = try await config.authenticate()

        print("Result (Access Token): \(session.accessToken)")
        print("Result (Refresh Token): \(session.refreshToken)")
    } catch {
        print("Error: \(error)")
    }
}

To use ATProtoKit in your apps, your app should target the specific version numbers:

• iOS and iPadOS 14 or later.
• macOS 13 or later.
• tvOS 14 or later.
• visionOS 1 or later.
• watchOS 9 or later.

For Linux, you need to use Swift 6.0 or later. At this time, you must use @preconcurrency when importing ATProtoKit. On Linux, the minimum requirements include:

• Ubuntu 18.04
• CentOS 7
• Red Hat UBI 9
• Debian 12
• Fedora 39

You can also use this project for any programs you make using Swift and running on Docker.

While this project will change significantly, feedback, issues, and contributions are highly welcomed and encouraged. If you'd like to contribute to this project, please be sure to read both the API Guidelines as well as the Contributor Guidelines before submitting a pull request. Any issues (such as bug reports or feedback) can be submitted in the Issues tab. Finally, if there are any security vulnerabilities, please read SECURITY.md for how to report it.

If you have any questions, you can ask me on Bluesky (@cjrriley.com). And while you're at it, give me a follow! I'm also active on the Bluesky API Touchers Discord server.

This Swift package is using the MIT License. Please view LICENSE.md for more details.

The documentation text used by Bluesky is licenced under the MIT Licence. Please view ATPROTO-LICENSE.md for more details.