Trello API: getting boards / lists / cards information

I don't believe there is a method in the Trello API to do this, so you'll have to get a list of boards for a user or organization:

GET /1/members/[idMember or username]/boards

Which returns (truncated to show just the parts we care about):

[{
    "id": "4eea4ffc91e31d1746000046",
    "name": "Example Board",
    "desc": "This board is used in the API examples",
    ...
    "shortUrl": "https://trello.com/b/OXiBYZoj"
}, {
    "id": "4ee7e707e582acdec800051a",
    "name": "Public Board",
    "desc": "A board that everyone can see",
    ...
    "shortUrl": "https://trello.com/b/IwLRbh3F"
}]

Then get the lists for each board:

GET /1/boards/[board_id]/lists

Which returns (truncated to only show the list id and name:

[{
    "id": "4eea4ffc91e31d174600004a",
    "name": "To Do Soon",
    ...
}, {
    "id": "4eea4ffc91e31d174600004b",
    "name": "Doing",
    ...
}, {
    "id": "4eea4ffc91e31d174600004c",
    "name": "Done",
    ...
}]

And go through this response for each board to build a list of all the lists a user or organization has.

For the users who want the easiest way to access the id of a list :

Use the ".json" hack !

add ".json" at the end of your board URL to display the same output of the API query for that board, in your browser ! (no other tool needed, no hassle dealing with authentication).

For instance, if the URL of your board is :

https://trello.com/b/EI6aGV1d/blahblah

point your browser to

https://trello.com/b/EI6aGV1d/blahblah.json

And you will obtain something like

{
  "id": "5a69a1935e732f529ef0ad8e",
  "name": "blahblah",
  "desc": "",
  "descData": null,
  "closed": false,
  [...]
    "cards": [
      {
          "id": "5b2776eba95348dd45f6b745",
          "idMemberCreator": "58ef2cd98728a111e6fbd8d3",
          "data": {
            "list": {
              "name": "Bla blah blah blah blah",
              "id": "5a69a1b82f62a7af027d0378"
            },
            "board": {
            [...]

Where you can just search for the name of your list to easily find its id next to it.

tip: use a json viewer extension to make your browser display a nice json. Personnally I use https://github.com/tulios/json-viewer/tree/0.18.0 but I guess there are a lot of good alternatives out there.