Ruby Trello API

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This library implements the Trello API.

Trello is an awesome tool for organization. Not just aimed at developers, but everybody. Seriously, check it out.

Full API documentation.


# gem install ruby-trello

Full Disclosure: This library is mostly complete, if you do find anything missing or not functioning as you expect it to, please let us know.

Supports Ruby 2.1.0 or newer.

Use version 1.3.0 or earlier for Ruby 1.9.3 support. Use version 1.4.x or earlier for Ruby 2.0.0 support.


Basic authorization:

  1. Get your API public key from Trello via the irb console:
$ gem install ruby-trello
$ irb -rubygems
irb> require 'trello'
irb> Trello.open_public_key_url                         # copy your public key
irb> Trello.open_authorization_url key: 'yourpublickey' # copy your member token
  1. You can now use the public key and member token in your app code:
require 'trello'

Trello.configure do |config|
  config.developer_public_key = TRELLO_DEVELOPER_PUBLIC_KEY # The "key" from step 1
  config.member_token = TRELLO_MEMBER_TOKEN # The token from step 2.

2-legged OAuth authorization

Trello.configure do |config|
  config.consumer_key = TRELLO_CONSUMER_KEY
  config.consumer_secret = TRELLO_CONSUMER_SECRET
  config.oauth_token = TRELLO_OAUTH_TOKEN
  config.oauth_token_secret = TRELLO_OAUTH_TOKEN_SECRET

3-legged OAuth authorization

Trello.configure do |config|
  config.consumer_key    = TRELLO_CONSUMER_KEY
  config.consumer_secret = TRELLO_CONSUMER_SECRET
  config.return_url      = ""
  config.callback        = lambda { |request_token|, request_token.secret) }

All the calls this library makes to Trello require authentication using these keys. Be sure to protect them.


So let's say you want to get information about the user bobtester. We can do something like this:

bob = Trello::Member.find("bobtester")

# Print out his name
puts bob.full_name # "Bob Tester"

# Print his bio
puts # A wonderfully delightful test user

# How about a list of his boards?

# And then to read the lists of the first board do : 
Accessing specific items

There is no find by name method in the trello API, to access a specific item, you have to know it's ID. The best way is to pretty print the elements and then find the id of the element you are looking for.

# With bob
pp bob.boards # Will pretty print all boards, allowing us to find our board id

# We can now access it's lists
pp Trello::Board.find( board_id ).lists # will pretty print all lists. Let's get the list id

# We can now access the cards of the list
pp Trello::List.find( list_id ).cards

# We can now access the checklists of the card
pp Trello::Card.find( card_id ).checklists

# and so on ...
Changing a checkbox state
# First get your checklist id 
checklist = Trello::Checklist.find( checklist_id )

# At this point, there is no more ids. To get your checklist item, 
# you have to know it's position (same as in the trello interface).
# Let's take the first
checklist_item = checklist.items.first

# Then we can read the status
checklist_item.state # return 'complete' or 'incomplete'

# We can update it (note we call update_item_state from checklist, not from checklist_item)
checklist.update_item_state(, 'complete' ) # or 'incomplete'

# You can also use true or false instead of 'complete' or 'incomplete'
checklist.update_item_state(, true ) # or false

Multiple Users

Applications that make requests on behalf of multiple Trello users have an alternative to global configuration. For each user's access token/secret pair, instantiate a Trello::Client:

@client_bob =
  :consumer_key => YOUR_CONSUMER_KEY,
  :consumer_secret => YOUR_CONSUMER_SECRET,
  :oauth_token => "Bob's access token",
  :oauth_token_secret => "Bob's access secret"

@client_alice =
  :consumer_key => YOUR_CONSUMER_KEY,
  :consumer_secret => YOUR_CONSUMER_SECRET,
  :oauth_token => "Alice's access token",
  :oauth_token_secret => "Alice's access secret"

You can now make threadsafe requests as the authenticated user: do
  @client_bob.find(:members, "bobtester")
  @client_bob.find(:boards, "bobs_board_id")
end do
  @client_alice.find(:members, "alicetester")
  @client_alice.find(:boards, "alices_board_id")

Special thanks

A special thanks goes out to Ben Biddington who has contributed a significant amount of refactoring and functionality to be deserving of a beer and this special thanks.


Several ways you can contribute. Documentation, code, tests, feature requests, bug reports.

If you submit a pull request that's accepted, you'll be given commit access to this repository.

Please see the file for more information.