Basecamp Comments API
Manage comments on any commentable recording
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OpenAPI Specification
openapi: 3.2.0
info:
title: Basecamp Comments API
description: The Basecamp API is a REST API that provides programmatic access to Basecamp's project management and team communication platform.
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: Comments
description: Manage comments on any commentable recording
paths:
/recordings/{recordingId}/comments.json:
get:
operationId: listComments
summary: List comments
description: Returns a paginated list of active comments on the specified recording. Any resource that exposes a comments_url can have its comments listed via this endpoint.
tags:
- Comments
parameters:
- $ref: '#/components/parameters/RecordingId'
responses:
'200':
description: List of comments
content:
application/json:
schema:
type: array
items:
$ref: '#/components/schemas/Comment'
'401':
$ref: '#/components/responses/Unauthorized'
'404':
$ref: '#/components/responses/NotFound'
post:
operationId: createComment
summary: Create a comment
description: Creates a new comment on the specified recording. All subscribers to the recording will be notified. Supports HTML-formatted content.
tags:
- Comments
parameters:
- $ref: '#/components/parameters/RecordingId'
requestBody:
required: true
content:
application/json:
schema:
$ref: '#/components/schemas/CommentCreateRequest'
responses:
'201':
description: Comment created
content:
application/json:
schema:
$ref: '#/components/schemas/Comment'
'400':
$ref: '#/components/responses/BadRequest'
'401':
$ref: '#/components/responses/Unauthorized'
/comments/{commentId}.json:
get:
operationId: getComment
summary: Get a comment
description: Returns the comment with the given ID.
tags:
- Comments
parameters:
- $ref: '#/components/parameters/CommentId'
responses:
'200':
description: Comment details
content:
application/json:
schema:
$ref: '#/components/schemas/Comment'
'401':
$ref: '#/components/responses/Unauthorized'
'404':
$ref: '#/components/responses/NotFound'
put:
operationId: updateComment
summary: Update a comment
description: Updates the content of the specified comment.
tags:
- Comments
parameters:
- $ref: '#/components/parameters/CommentId'
requestBody:
required: true
content:
application/json:
schema:
$ref: '#/components/schemas/CommentCreateRequest'
responses:
'200':
description: Updated comment
content:
application/json:
schema:
$ref: '#/components/schemas/Comment'
'401':
$ref: '#/components/responses/Unauthorized'
'404':
$ref: '#/components/responses/NotFound'
components:
parameters:
RecordingId:
name: recordingId
in: path
required: true
description: Unique identifier of the recording
schema:
type: integer
CommentId:
name: commentId
in: path
required: true
description: Unique identifier of the comment
schema:
type: integer
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'
Comment:
allOf:
- $ref: '#/components/schemas/Recording'
- type: object
properties:
content:
type: string
description: HTML-formatted comment body
boosts_count:
type: integer
description: Number of boosts on this comment
parent:
$ref: '#/components/schemas/Recording'
CommentCreateRequest:
type: object
required:
- content
properties:
content:
type: string
description: Comment body in HTML format
Error:
type: object
properties:
error:
type: string
description: Human-readable error message
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
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
responses:
NotFound:
description: Not found — the requested resource does not exist
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
Unauthorized:
description: Unauthorized — missing or invalid Bearer token
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
BadRequest:
description: Bad request — missing required fields or invalid values
content:
application/json:
schema:
$ref: '#/components/schemas/Error'
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