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Recent Updates

We improve the Slack platform every day by releasing new features, squashing bugs, and delivering fresh documentation. Here's an account of what's recently happened.

January 2017

  • APIs Now your app can read, write, and party with message threads. Rolling out to teams over the next few days, message threads are a perfect place to tuck your wonderful workflows. Here's our announcement.
  • APIs This new year's resolution is a minor slash command revolution: a backwards-compatible, familiar, and decisive means to resolve user IDs, channel IDs, and links from references in slash command invocations. Learn how to turn on this helpful, long-requested feature.

December 2016

November 2016

  • Apps Let's extend a warm welcome to new app_id fields now appearing in our APIs. app_id is now found in rtm.start & bots.info. You'll also find app_id in the bot_added & bot_changed events. What's an app_id? It's the alphanumeric string found in the URL bar while managing your Slack apps.
  • APIs We've added a new OAuth permission scope called users:read.email. Apps created after January 4th, 2017 will need to request this additional scope to gain access to team member email fields when using users.list and users.info. Existing Slack apps with users:read are automatically grandfathered to include these fields. Here's even more detail on that.
  • Docs Now you'll find links to practical tutorials and thoughtful articles displayed beside relevant documentation found here on api.slack.com. Discover new articles or browse them by topic in our new Tutorials hub. Written something great? Tell us about it!
  • Tools Our developer relations team has renewed Slack's adoption of key open source tooling: Slack Developer Kits. Discover our Python & node.js SDKs in their new home on our community index.

October 2016

September 2016

  • APIs We will soon add an additional response_metadata node to our JSON responses; we'll put warnings there first and other useful stuff later. More details are available.
  • APIs Newly issued OAuth token strings are longer than they were before, as we informed you about last month. Let us know if this vexes you.
  • APIs Now you can use the users.profile:write OAuth permission scope to reset and upload profile images using users.deletePhoto and users.setPhoto.
  • Apps We've dramatically improved the process of submitting a Slack App for inclusion in our Slack App Directory. You'll find a helpful, interactive checklist when first submitting your app. When you're ready to iterate further, you can simply create a secondary beta application. If a core piece of your app's functionality changes (like requesting new OAuth permission scopes), we'll happily review your app again. Read all about it on the platform blog.

August 2016

  • Apps Ever needed to send a user to Slack directly from your app? Here's how to deep link and make native Slack clients part of your app's workflow: Open key teams, channels, and conversations. Or, defer to search results using the slack:// URI scheme.
  • APIs The character length of token strings is getting longer. Find out how long they'll get and how to future-proof yourself for changes in the future.
  • APIs You may encounter an occasional user ID beginning with the letter W. We've released a new version of node-slack-sdk to correct a related bug. Read more about these changes.
  • APIs Introducing the Events API, a new way for Slack apps to receive event types previously available only to the real time messaging API. Subscribe to the events your app needs and have them delivered right to your server as they happen. Build a bot or event-driven app without worrying about websockets, and scale it like a web app. Read more about the Events API in our blog post, Subscribe to the Events API.

July 2016

  • APIs Until now, it's been easy to accidentally send messages flush with hundreds of message attachments. We've begun limiting the number of message attachments per message to 100. For approaches like chat.postMessage, incoming webhooks, and chat.update, and response_urls you will receive a too_many_attachments error. Unfortunately, we are unable to serve you an error when sending messages as part of a slash command or message buttons invocation response.
  • Apps If you're interested in listing your Slack App in our directory, you'll want to review our new Slack App Directory Agreement and consider our Security Review Process. Find these and other policies in our new Slack App developer policy hub.
  • APIs We've corrected a bug where incoming webhooks could post messages in "#general" even 1) if that channel restricts posts and 2) the user owning the webhook was not allowed to post there. This new behavior will only prevent recently created webhooks from posting to restricted "#general" channels, so if your old webhooks are relying on this quirk, they'll be fine for now.

June 2016

  • APIs Now your applications can read and write defined team profile fields for individual team members. The users.profile:write scope allows you to edit fields with users.profile.set. The users.profile:read scope empowers you to discover available fields with team.profile.get and retrieve user profiles with users.profile.get.
  • Apps Slack apps can now add action-invoking interactive buttons to messages, allowing you to simplify workflows and encourage users to take decisive action from within Slack.
  • Tools For better readability, syntax highlighting has been added to code blocks throughout our documentation.
  • APIs We've corrected the behavior of stars.list so that it only returns stars belonging to the owner of the presented token. The user parameter may still be used if the provided user ID belongs to the user utilizing the token.
  • APIs Team administrators may now use tokens with the admin scope to request information about the billable status of team members using the team.billableInfo API method.
  • APIs Now that bot_id appears in the real-time messaging API and Web API, you need a better way to look up bot users. Use the new bots.info method to query bot/application information by ID. It requires the users:read scope.

May 2016

April 2016

March 2016

  • APIs Now chat.postMessage will better intuit your intent when you don't explicitly specify the as_user parameter. Let us know if we're guessing wrong!
  • APIs One day soon our Web API will warn you when something is only slightly wrong with your requests. Read all about API warnings.
  • Docs Be welcoming. Be kind. Look out for each other. This is the Code of Conduct for the Slack Developer community.
  • APIs Now bot users can use methods requiring the dnd:read scope, like dnd.info and dnd.teamInfo. Your bots'll be more polite than a protocol droid!
  • Docs Home in on hosting for your app or integration with this collection of hosting providers.
  • Tools Craft your fancy messages in real time with the new Message Builder!
  • Apps Users can now rename Bot Users they've installed as Slack Apps. More naming, more claiming. No more terrible twos.
  • Docs We finally updated the slackhq/slack-api-docs repository, reflecting recently introduced and quite ancient documentation updates and new features.

February 2016

January 2016

  • Alert As of January 4th, 2016, authorization headers are now required for most Web API requests involving file URLs. See this doc and blog post for more information.
  • Alert url and url_download are no longer part of file objects
  • Docs Enjoy our evolving collection of Frequently Asked Questions (and answers!)
  • APIs Responses to Incoming Webhook requests now include channel_id
  • Apps Make sure you're ready before submitting your Slack App for review by following this Slack App Checklist.
  • Docs Incoming Webhooks documentation updated to better bait best practices and discourage fishy formatting behavior.
  • Docs The file object documentation now includes a list of possible file types.

December 2015

November 2015

Many wonderful developments occurred before November 2015, but they are not logged here.