Manage kanban-style card tables and card movements
openapi: 3.1.0
info:
title: Basecamp Authorization Card Tables API
description: The Basecamp API is a REST API that provides programmatic access to Basecamp's project management and team communication platform. It enables developers to manage projects, to-do lists, messages, documents, schedules, campfires, uploads, card tables, templates, and team members across Basecamp accounts. The API uses OAuth 2.0 for authentication and returns JSON responses, with all requests scoped to an account ID in the base URL path. Resources include projects, people, to-dos, message boards, documents, card tables, campfires, questionnaires, and webhooks, covering the full breadth of Basecamp's collaboration toolset.
version: '1.0'
contact:
name: Basecamp Developer Support
url: https://github.com/basecamp/bc3-api
termsOfService: https://basecamp.com/terms
servers:
- url: https://3.basecampapi.com/{accountId}
description: Production Server
variables:
accountId:
description: Your Basecamp account ID
default: '999999999'
security:
- bearerAuth: []
tags:
- name: Card Tables
description: Manage kanban-style card tables and card movements
paths:
/card_tables/{cardTableId}.json:
get:
operationId: getCardTable
summary: Get a card table
description: Returns the card table with the given ID, including its columns and metadata such as card counts per column.
tags:
- Card Tables
parameters:
- $ref: '#/components/parameters/CardTableId'
responses:
'200':
description: Card table details
content:
application/json:
schema:
$ref: '#/components/schemas/CardTable'
'401':
$ref: '#/components/responses/Unauthorized'
'404':
$ref: '#/components/responses/NotFound'
/card_tables/{cardTableId}/moves.json:
post:
operationId: moveCard
summary: Move a card
description: Moves a card to a different column on the card table at the specified zero-indexed position.
tags:
- Card Tables
parameters:
- $ref: '#/components/parameters/CardTableId'
requestBody:
required: true
content:
application/json:
schema:
$ref: '#/components/schemas/CardMoveRequest'
responses:
'204':
description: Card moved
'400':
$ref: '#/components/responses/BadRequest'
'401':
$ref: '#/components/responses/Unauthorized'
components:
schemas:
Recording:
type: object
description: A generic recording object representing any Basecamp content resource such as a message, to-do, document, comment, or upload.
properties:
id:
type: integer
description: Recording ID
status:
type: string
description: Recording status
enum:
- active
- archived
- trashed
visible_to_clients:
type: boolean
description: Whether this recording is visible to client users
created_at:
type: string
format: date-time
description: Timestamp when the recording was created
updated_at:
type: string
format: date-time
description: Timestamp when the recording was last updated
title:
type: string
description: Title or summary of the recording
inherits_status:
type: boolean
description: Whether this recording inherits its status from a parent
type:
type: string
description: Recording type (e.g., Message, Todo, Document)
url:
type: string
format: uri
description: API URL for this recording
app_url:
type: string
format: uri
description: Web URL for this recording
bucket:
$ref: '#/components/schemas/BucketRef'
creator:
$ref: '#/components/schemas/PersonRef'
CardMoveRequest:
type: object
required:
- source_id
- target_id
- position
properties:
source_id:
type: integer
description: Recording ID of the card to move
target_id:
type: integer
description: Recording ID of the destination column
position:
type: integer
description: Zero-indexed position within the destination column
minimum: 0
CardColumn:
type: object
description: A column within a card table
properties:
id:
type: integer
description: Column ID
title:
type: string
description: Column title
type:
type: string
description: Column type (Kanban::Column, Kanban::Triage, etc.)
color:
type: string
description: Column color
nullable: true
position:
type: integer
description: Column position within the table
cards_count:
type: integer
description: Number of cards in this column
cards_url:
type: string
format: uri
description: API URL to list cards in this column
PersonRef:
type: object
description: Minimal reference to a Basecamp person
properties:
id:
type: integer
description: Person ID
attachable_sgid:
type: string
description: Signed global ID for attaching this person
name:
type: string
description: Full name
email_address:
type: string
format: email
description: Email address
personable_type:
type: string
description: Type of personable (User, Client, etc.)
title:
type: string
description: Job title
bio:
type: string
description: Short biography
location:
type: string
description: Location string
created_at:
type: string
format: date-time
description: Account creation timestamp
updated_at:
type: string
format: date-time
description: Last update timestamp
admin:
type: boolean
description: Whether the person is an account administrator
owner:
type: boolean
description: Whether the person is the account owner
client:
type: boolean
description: Whether the person is a client user
employee:
type: boolean
description: Whether the person is an employee
time_zone:
type: string
description: IANA time zone name
avatar_url:
type: string
format: uri
description: URL to the person's avatar image
company:
type: object
description: Company the person belongs to
properties:
id:
type: integer
description: Company ID
name:
type: string
description: Company name
BucketRef:
type: object
description: Reference to the project (bucket) that contains a resource
properties:
id:
type: integer
description: Project ID
name:
type: string
description: Project name
type:
type: string
description: Resource type, always "Project"
url:
type: string
format: uri
description: API URL for the project
app_url:
type: string
format: uri
description: Web URL for the project
CardTable:
allOf:
- $ref: '#/components/schemas/Recording'
- type: object
properties:
lists:
type: array
description: Columns in the card table
items:
$ref: '#/components/schemas/CardColumn'
Error:
type: object
properties:
error:
type: string
description: Human-readable error message
responses:
BadRequest:
description: Bad request — missing required fields or invalid values
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
Unauthorized:
description: Unauthorized — missing or invalid Bearer token
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
NotFound:
description: Not found — the requested resource does not exist
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
parameters:
CardTableId:
name: cardTableId
in: path
required: true
description: Unique identifier of the card table
schema:
type: integer
securitySchemes:
bearerAuth:
type: http
scheme: bearer
description: 'OAuth 2.0 Bearer token obtained via the Basecamp authorization code flow at launchpad.37signals.com. Include as "Authorization: Bearer {token}" in all requests.'
externalDocs:
description: Basecamp API Documentation
url: https://github.com/basecamp/bc3-api