package slacko

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Type-safe binding to the Slack API


Dune Dependency






Type-safe binding to the Slack API

Slacko provides an easy to use interface to the Slack REST API, which allows to join Slack channels, post messages, create channels and groups and manage those, upload and search files, manage presence.

Published: 17 Feb 2019



A neat interface for Slack

Your company got you Slack and you're all like "yeah, and now I am forced to use a browser or what?". Fear no more, because as it turns out Slack has a REST API that can be accessed.

Yeah, scripting Slack via curl sucks, so let's do something that sucks less. Maybe a bit? How about using an existing integration? They are incomplete or for sucky languages? Glad you asked, because I have just the right thing for you: a neat interface to Slack via OCaml!

What do you need? OCaml, OPAM and a Slack token. All for free, no asterisks, no hidden clauses. Life can be so easy.

Install that cow!

Huzzah, I got you interested? Lucky you, Slacko can easily be installed via OCaml Package Manager (OPAM), so you just write

$ opam install slacko

Now wasn't this easy? Bet your ass it was! And you know what? It even gets better: it also installed you a nifty little executable called slack-notify which you can use to post directly to Slack from your shell, no programming required at all. Actually, once compiled, not even OCaml is required anymore, everything is self-contained.

In case you want to manually install it, you can, too. There's a number of dependencies that you have to take care of yourself, for the list you'll have to check the slacko.opam file.

Then you can build Slacko by yourself:

$ make

How do I even use this thing?

The workflow is always very simple: you get a token from Slack either manually or my querying the OAuth API. Then you can instantly use any API method that Slacko supports. If you want, you can look at snapshot of the Slacko docs to see what functions are available (hint: all of them).

Ready, set, go!

Not convinced yet? Check out this neat documentation from slack-notify to help you out.

       slack-notify - Writes messages to slack

       slack-notify [OPTION]... CHANNEL MSG

           Name of the channel to post to

       MSG Message to send

       --help[=FMT] (default=pager)
           Show this help in format FMT (pager, plain or groff).

           emoji to use as the icon for this message. Overrides icon-url

           URL to an image to use as the icon for this message

       -t TOKEN, --token=TOKEN
           The Slack API access token

       -u USERNAME, --username=USERNAME
           Name of the bot in the chat

So what is this token thing? Once you signed up for Slack, you can get a token for every team you are in from the Slack API docs. Click on the "get token" link and you're all set.

But I do want to code my own stuff!

You know, Slacko is a nice gal/guy. So you can just plug together whatever you want with it, since it currently implements 100% of the Slack API! Well, except for the Real-Time-Messaging part, which is on our TODO! How neat is this? And you can use it in your own code without worrying about the license one bit, since the LGPL 3.0 is liberal for re-use, coupled with the OCaml linking exception. For realz!

Something's amiss?

I know, I know, it is hardly believable that something could possibly be missing from this library. But wonders happen, and if you run into one of these cases, just shoot me a pull request.

Credit where credit's due

Thanks go to all the people who wrote CoHTTP, a real-world HTTP library that doesn't suck and Lwt, an oddball library that subconsciously makes sense. Also, the fine folks in #ocaml on freenode.

Dev Dependencies (1)

  1. ounit with-test

Used by


Conflicts (1)

  1. conduit = "0.14.1"

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