Timesheets

March 23, 2026 · View on GitHub

Endpoints:

Get timesheet report

  • GET /reports/timesheet.json will return a list of all timesheet entries across the account, within a given timeframe.

Note: This endpoint is currently not paginated.

Optional query parameters:

This endpoint without any parameters returns only timesheet entries for the last month.

  • start_date - report start date (ISO 8601). If provided also the end_date is required.
  • end_date - report end date (ISO 8601). If provided also the start_date is required.
  • person_id - single person ID. Default: Everyone.
  • bucket_id - single project ID. Default: All projects.
Example JSON Response
[
  {
    "id": 1069479845,
    "status": "active",
    "visible_to_clients": false,
    "created_at": "2026-02-26T16:46:12.070Z",
    "updated_at": "2026-02-26T16:46:12.070Z",
    "title": "Timesheet entry",
    "inherits_status": true,
    "type": "Timesheet::Entry",
    "url": "https://3.basecampapi.com/195539477/projects/2085958504/timesheet/entries/1069479845.json",
    "app_url": "https://3.basecamp.com/195539477/projects/2085958504/timesheet/entries/1069479845",
    "bookmark_url": "https://3.basecampapi.com/195539477/my/bookmarks/BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiLmdpZDovL2JjMy9SZWNvcmRpbmcvMTA2OTQ3OTg0NT9leHBpcmVzX2luBjsAVEkiCHB1cgY7AFRJIg1yZWFkYWJsZQY7AFQ=--c39764b3e2cc09bd0fb4d1a8ef655fcc01634c72.json",
    "parent": {
      "id": 1069479406,
      "title": "We won Leto!",
      "type": "Message",
      "url": "https://3.basecampapi.com/195539477/buckets/2085958504/messages/1069479406.json",
      "app_url": "https://3.basecamp.com/195539477/buckets/2085958504/messages/1069479406"
    },
    "bucket": {
      "id": 2085958504,
      "name": "The Leto Laptop",
      "type": "Project"
    },
    "creator": {
      "id": 1049715913,
      "attachable_sgid": "BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiK2dpZDovL2JjMy9QZXJzb24vMTA0OTcxNTkxMz9leHBpcmVzX2luBjsAVEkiCHB1cgY7AFRJIg9hdHRhY2hhYmxlBjsAVA==--e627c45e6b34e08862da23906862412620e4d5d9",
      "name": "Victor Cooper",
      "email_address": "victor@honchodesign.com",
      "personable_type": "User",
      "title": "Chief Strategist",
      "bio": "Don’t let your dreams be dreams",
      "location": "Chicago, IL",
      "created_at": "2026-02-26T16:44:49.965Z",
      "updated_at": "2026-02-26T16:44:51.645Z",
      "admin": true,
      "owner": true,
      "client": false,
      "employee": true,
      "time_zone": "America/Chicago",
      "avatar_url": "https://3.basecampapi.com/195539477/people/BAhpBMlkkT4=--5fe7b70fbee7a7f0e2e1e19df7579e5d880c753d/avatar",
      "company": {
        "id": 1033447817,
        "name": "Honcho Design"
      },
      "can_ping": true,
      "can_manage_projects": true,
      "can_manage_people": true,
      "can_access_timesheet": true,
      "can_access_hill_charts": true
    },
    "date": "2026-02-25",
    "description": "Team Meeting Prep",
    "hours": "2.0",
    "person": {
      "id": 1049715913,
      "attachable_sgid": "BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiK2dpZDovL2JjMy9QZXJzb24vMTA0OTcxNTkxMz9leHBpcmVzX2luBjsAVEkiCHB1cgY7AFRJIg9hdHRhY2hhYmxlBjsAVA==--e627c45e6b34e08862da23906862412620e4d5d9",
      "name": "Victor Cooper",
      "email_address": "victor@honchodesign.com",
      "personable_type": "User",
      "title": "Chief Strategist",
      "bio": "Don’t let your dreams be dreams",
      "location": "Chicago, IL",
      "created_at": "2026-02-26T16:44:49.965Z",
      "updated_at": "2026-02-26T16:44:51.645Z",
      "admin": true,
      "owner": true,
      "client": false,
      "employee": true,
      "time_zone": "America/Chicago",
      "avatar_url": "https://3.basecampapi.com/195539477/people/BAhpBMlkkT4=--5fe7b70fbee7a7f0e2e1e19df7579e5d880c753d/avatar",
      "company": {
        "id": 1033447817,
        "name": "Honcho Design"
      },
      "can_ping": true,
      "can_manage_projects": true,
      "can_manage_people": true,
      "can_access_timesheet": true,
      "can_access_hill_charts": true
    }
  }
]
Copy as cURL
curl -s -H "Authorization: Bearer $ACCESS_TOKEN" https://3.basecampapi.com/$ACCOUNT_ID/reports/timesheet.json

Get timesheet for a project

  • GET /projects/1/timesheet.json will return a [paginated list][pagination] of timesheet entries in the project with an ID of 1.

This includes all entries across the project: entries logged directly to the project as well as entries logged on specific to-dos, messages, cards, and other recordings. Each entry's parent field shows which recording it belongs to. For entries logged at the project level, the parent type is Timesheet.

Example JSON Response
[
  {
    "id": 1069479845,
    "status": "active",
    "visible_to_clients": false,
    "created_at": "2026-02-26T16:46:12.070Z",
    "updated_at": "2026-02-26T16:46:12.070Z",
    "title": "Timesheet entry",
    "inherits_status": true,
    "type": "Timesheet::Entry",
    "url": "https://3.basecampapi.com/195539477/projects/2085958504/timesheet/entries/1069479845.json",
    "app_url": "https://3.basecamp.com/195539477/projects/2085958504/timesheet/entries/1069479845",
    "bookmark_url": "https://3.basecampapi.com/195539477/my/bookmarks/BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiLmdpZDovL2JjMy9SZWNvcmRpbmcvMTA2OTQ3OTg0NT9leHBpcmVzX2luBjsAVEkiCHB1cgY7AFRJIg1yZWFkYWJsZQY7AFQ=--c39764b3e2cc09bd0fb4d1a8ef655fcc01634c72.json",
    "parent": {
      "id": 1069479406,
      "title": "We won Leto!",
      "type": "Message",
      "url": "https://3.basecampapi.com/195539477/buckets/2085958504/messages/1069479406.json",
      "app_url": "https://3.basecamp.com/195539477/buckets/2085958504/messages/1069479406"
    },
    "bucket": {
      "id": 2085958504,
      "name": "The Leto Laptop",
      "type": "Project"
    },
    "creator": {
      "id": 1049715913,
      "attachable_sgid": "BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiK2dpZDovL2JjMy9QZXJzb24vMTA0OTcxNTkxMz9leHBpcmVzX2luBjsAVEkiCHB1cgY7AFRJIg9hdHRhY2hhYmxlBjsAVA==--e627c45e6b34e08862da23906862412620e4d5d9",
      "name": "Victor Cooper",
      "email_address": "victor@honchodesign.com",
      "personable_type": "User",
      "title": "Chief Strategist",
      "bio": "Don’t let your dreams be dreams",
      "location": "Chicago, IL",
      "created_at": "2026-02-26T16:44:49.965Z",
      "updated_at": "2026-02-26T16:44:51.645Z",
      "admin": true,
      "owner": true,
      "client": false,
      "employee": true,
      "time_zone": "America/Chicago",
      "avatar_url": "https://3.basecampapi.com/195539477/people/BAhpBMlkkT4=--5fe7b70fbee7a7f0e2e1e19df7579e5d880c753d/avatar",
      "company": {
        "id": 1033447817,
        "name": "Honcho Design"
      },
      "can_ping": true,
      "can_manage_projects": true,
      "can_manage_people": true,
      "can_access_timesheet": true,
      "can_access_hill_charts": true
    },
    "date": "2026-02-25",
    "description": "Team Meeting Prep",
    "hours": "2.0",
    "person": {
      "id": 1049715913,
      "attachable_sgid": "BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiK2dpZDovL2JjMy9QZXJzb24vMTA0OTcxNTkxMz9leHBpcmVzX2luBjsAVEkiCHB1cgY7AFRJIg9hdHRhY2hhYmxlBjsAVA==--e627c45e6b34e08862da23906862412620e4d5d9",
      "name": "Victor Cooper",
      "email_address": "victor@honchodesign.com",
      "personable_type": "User",
      "title": "Chief Strategist",
      "bio": "Don’t let your dreams be dreams",
      "location": "Chicago, IL",
      "created_at": "2026-02-26T16:44:49.965Z",
      "updated_at": "2026-02-26T16:44:51.645Z",
      "admin": true,
      "owner": true,
      "client": false,
      "employee": true,
      "time_zone": "America/Chicago",
      "avatar_url": "https://3.basecampapi.com/195539477/people/BAhpBMlkkT4=--5fe7b70fbee7a7f0e2e1e19df7579e5d880c753d/avatar",
      "company": {
        "id": 1033447817,
        "name": "Honcho Design"
      },
      "can_ping": true,
      "can_manage_projects": true,
      "can_manage_people": true,
      "can_access_timesheet": true,
      "can_access_hill_charts": true
    }
  }
]
Copy as cURL
curl -s -H "Authorization: Bearer $ACCESS_TOKEN" https://3.basecampapi.com/$ACCOUNT_ID/projects/1/timesheet.json

Get timesheet for a recording

  • GET /recordings/2/timesheet.json will return a [paginated list][pagination] of timesheet entries for the recording with ID of 2.
Example JSON Response
[
  {
    "id": 1069479845,
    "status": "active",
    "visible_to_clients": false,
    "created_at": "2026-02-26T16:46:12.070Z",
    "updated_at": "2026-02-26T16:46:12.070Z",
    "title": "Timesheet entry",
    "inherits_status": true,
    "type": "Timesheet::Entry",
    "url": "https://3.basecampapi.com/195539477/projects/2085958504/timesheet/entries/1069479845.json",
    "app_url": "https://3.basecamp.com/195539477/projects/2085958504/timesheet/entries/1069479845",
    "bookmark_url": "https://3.basecampapi.com/195539477/my/bookmarks/BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiLmdpZDovL2JjMy9SZWNvcmRpbmcvMTA2OTQ3OTg0NT9leHBpcmVzX2luBjsAVEkiCHB1cgY7AFRJIg1yZWFkYWJsZQY7AFQ=--c39764b3e2cc09bd0fb4d1a8ef655fcc01634c72.json",
    "parent": {
      "id": 1069479406,
      "title": "We won Leto!",
      "type": "Message",
      "url": "https://3.basecampapi.com/195539477/buckets/2085958504/messages/1069479406.json",
      "app_url": "https://3.basecamp.com/195539477/buckets/2085958504/messages/1069479406"
    },
    "bucket": {
      "id": 2085958504,
      "name": "The Leto Laptop",
      "type": "Project"
    },
    "creator": {
      "id": 1049715913,
      "attachable_sgid": "BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiK2dpZDovL2JjMy9QZXJzb24vMTA0OTcxNTkxMz9leHBpcmVzX2luBjsAVEkiCHB1cgY7AFRJIg9hdHRhY2hhYmxlBjsAVA==--e627c45e6b34e08862da23906862412620e4d5d9",
      "name": "Victor Cooper",
      "email_address": "victor@honchodesign.com",
      "personable_type": "User",
      "title": "Chief Strategist",
      "bio": "Don’t let your dreams be dreams",
      "location": "Chicago, IL",
      "created_at": "2026-02-26T16:44:49.965Z",
      "updated_at": "2026-02-26T16:44:51.645Z",
      "admin": true,
      "owner": true,
      "client": false,
      "employee": true,
      "time_zone": "America/Chicago",
      "avatar_url": "https://3.basecampapi.com/195539477/people/BAhpBMlkkT4=--5fe7b70fbee7a7f0e2e1e19df7579e5d880c753d/avatar",
      "company": {
        "id": 1033447817,
        "name": "Honcho Design"
      },
      "can_ping": true,
      "can_manage_projects": true,
      "can_manage_people": true,
      "can_access_timesheet": true,
      "can_access_hill_charts": true
    },
    "date": "2026-02-25",
    "description": "Team Meeting Prep",
    "hours": "2.0",
    "person": {
      "id": 1049715913,
      "attachable_sgid": "BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiK2dpZDovL2JjMy9QZXJzb24vMTA0OTcxNTkxMz9leHBpcmVzX2luBjsAVEkiCHB1cgY7AFRJIg9hdHRhY2hhYmxlBjsAVA==--e627c45e6b34e08862da23906862412620e4d5d9",
      "name": "Victor Cooper",
      "email_address": "victor@honchodesign.com",
      "personable_type": "User",
      "title": "Chief Strategist",
      "bio": "Don’t let your dreams be dreams",
      "location": "Chicago, IL",
      "created_at": "2026-02-26T16:44:49.965Z",
      "updated_at": "2026-02-26T16:44:51.645Z",
      "admin": true,
      "owner": true,
      "client": false,
      "employee": true,
      "time_zone": "America/Chicago",
      "avatar_url": "https://3.basecampapi.com/195539477/people/BAhpBMlkkT4=--5fe7b70fbee7a7f0e2e1e19df7579e5d880c753d/avatar",
      "company": {
        "id": 1033447817,
        "name": "Honcho Design"
      },
      "can_ping": true,
      "can_manage_projects": true,
      "can_manage_people": true,
      "can_access_timesheet": true,
      "can_access_hill_charts": true
    }
  }
]
Copy as cURL
curl -s -H "Authorization: Bearer $ACCESS_TOKEN" https://3.basecampapi.com/$ACCOUNT_ID/recordings/2/timesheet.json

Get a timesheet entry

  • GET /timesheet_entries/2.json will return the timesheet entry with an ID of 2.
Example JSON Response
{
  "id": 1069479848,
  "status": "active",
  "visible_to_clients": false,
  "created_at": "2026-02-26T16:46:14.812Z",
  "updated_at": "2026-02-26T16:46:14.812Z",
  "title": "Timesheet entry",
  "inherits_status": true,
  "type": "Timesheet::Entry",
  "url": "https://3.basecampapi.com/195539477/projects/2085958504/timesheet/entries/1069479848.json",
  "app_url": "https://3.basecamp.com/195539477/projects/2085958504/timesheet/entries/1069479848",
  "bookmark_url": "https://3.basecampapi.com/195539477/my/bookmarks/BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiLmdpZDovL2JjMy9SZWNvcmRpbmcvMTA2OTQ3OTg0OD9leHBpcmVzX2luBjsAVEkiCHB1cgY7AFRJIg1yZWFkYWJsZQY7AFQ=--c0d1292c53eef3e210b24fbd2ad16864dae8875f.json",
  "parent": {
    "id": 1069479406,
    "title": "We won Leto!",
    "type": "Message",
    "url": "https://3.basecampapi.com/195539477/buckets/2085958504/messages/1069479406.json",
    "app_url": "https://3.basecamp.com/195539477/buckets/2085958504/messages/1069479406"
  },
  "bucket": {
    "id": 2085958504,
    "name": "The Leto Laptop",
    "type": "Project"
  },
  "creator": {
    "id": 1049715913,
    "attachable_sgid": "BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiK2dpZDovL2JjMy9QZXJzb24vMTA0OTcxNTkxMz9leHBpcmVzX2luBjsAVEkiCHB1cgY7AFRJIg9hdHRhY2hhYmxlBjsAVA==--e627c45e6b34e08862da23906862412620e4d5d9",
    "name": "Victor Cooper",
    "email_address": "victor@honchodesign.com",
    "personable_type": "User",
    "title": "Chief Strategist",
    "bio": "Don’t let your dreams be dreams",
    "location": "Chicago, IL",
    "created_at": "2026-02-26T16:44:49.965Z",
    "updated_at": "2026-02-26T16:44:51.645Z",
    "admin": true,
    "owner": true,
    "client": false,
    "employee": true,
    "time_zone": "America/Chicago",
    "avatar_url": "https://3.basecampapi.com/195539477/people/BAhpBMlkkT4=--5fe7b70fbee7a7f0e2e1e19df7579e5d880c753d/avatar",
    "company": {
      "id": 1033447817,
      "name": "Honcho Design"
    },
    "can_ping": true,
    "can_manage_projects": true,
    "can_manage_people": true,
    "can_access_timesheet": true,
    "can_access_hill_charts": true
  },
  "date": "2026-02-26",
  "description": "API docs example",
  "hours": "1.5",
  "person": {
    "id": 1049715913,
    "attachable_sgid": "BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiK2dpZDovL2JjMy9QZXJzb24vMTA0OTcxNTkxMz9leHBpcmVzX2luBjsAVEkiCHB1cgY7AFRJIg9hdHRhY2hhYmxlBjsAVA==--e627c45e6b34e08862da23906862412620e4d5d9",
    "name": "Victor Cooper",
    "email_address": "victor@honchodesign.com",
    "personable_type": "User",
    "title": "Chief Strategist",
    "bio": "Don’t let your dreams be dreams",
    "location": "Chicago, IL",
    "created_at": "2026-02-26T16:44:49.965Z",
    "updated_at": "2026-02-26T16:44:51.645Z",
    "admin": true,
    "owner": true,
    "client": false,
    "employee": true,
    "time_zone": "America/Chicago",
    "avatar_url": "https://3.basecampapi.com/195539477/people/BAhpBMlkkT4=--5fe7b70fbee7a7f0e2e1e19df7579e5d880c753d/avatar",
    "company": {
      "id": 1033447817,
      "name": "Honcho Design"
    },
    "can_ping": true,
    "can_manage_projects": true,
    "can_manage_people": true,
    "can_access_timesheet": true,
    "can_access_hill_charts": true
  }
}
Copy as cURL
curl -s -H "Authorization: Bearer $ACCESS_TOKEN" https://3.basecampapi.com/$ACCOUNT_ID/timesheet_entries/2.json

Create a timesheet entry

  • POST /recordings/2/timesheet/entries.json creates a timesheet entry under the recording with ID 2.

The recording can be any timesheetable type: a message, to-do, card, document, upload, schedule entry, or the project timesheet itself.

Project-level entries: Time can be logged directly to a project without associating it with a specific to-do or message. To do this, use the project's timesheet recording ID in the URL above. Unlike other tools, the timesheet doesn't appear in the project's dock array — instead, check the project's timesheet_enabled flag. When it's true, you can access the project timesheet at GET /projects/1/timesheet.json. The entries in that response include a parent field; for project-level entries, the parent type is Timesheet and its id is the recording ID to use in the create URL.

Required parameters:

  • date - the date the time was spent (ISO 8601, e.g. 2024-05-16).
  • hours - the number of hours. Accepts decimal (1.5) or time format (1:30).

Optional parameters:

  • description - a note about the work performed.
  • person_id - the person the time is for. Defaults to the authenticated user. Must be a non-client member of the project.

This endpoint will return 201 Created with the current JSON representation of the timesheet entry if the creation was a success. See the Get timesheet for a project endpoint for more info on the payload.

Example JSON Request
{
  "date": "2024-05-16",
  "hours": "1:30",
  "description": "Client meeting prep"
}
Example JSON Response
{
  "id": 1069479848,
  "status": "active",
  "visible_to_clients": false,
  "created_at": "2026-02-26T16:46:14.812Z",
  "updated_at": "2026-02-26T16:46:14.812Z",
  "title": "Timesheet entry",
  "inherits_status": true,
  "type": "Timesheet::Entry",
  "url": "https://3.basecampapi.com/195539477/projects/2085958504/timesheet/entries/1069479848.json",
  "app_url": "https://3.basecamp.com/195539477/projects/2085958504/timesheet/entries/1069479848",
  "bookmark_url": "https://3.basecampapi.com/195539477/my/bookmarks/BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiLmdpZDovL2JjMy9SZWNvcmRpbmcvMTA2OTQ3OTg0OD9leHBpcmVzX2luBjsAVEkiCHB1cgY7AFRJIg1yZWFkYWJsZQY7AFQ=--c0d1292c53eef3e210b24fbd2ad16864dae8875f.json",
  "parent": {
    "id": 1069479406,
    "title": "We won Leto!",
    "type": "Message",
    "url": "https://3.basecampapi.com/195539477/buckets/2085958504/messages/1069479406.json",
    "app_url": "https://3.basecamp.com/195539477/buckets/2085958504/messages/1069479406"
  },
  "bucket": {
    "id": 2085958504,
    "name": "The Leto Laptop",
    "type": "Project"
  },
  "creator": {
    "id": 1049715913,
    "attachable_sgid": "BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiK2dpZDovL2JjMy9QZXJzb24vMTA0OTcxNTkxMz9leHBpcmVzX2luBjsAVEkiCHB1cgY7AFRJIg9hdHRhY2hhYmxlBjsAVA==--e627c45e6b34e08862da23906862412620e4d5d9",
    "name": "Victor Cooper",
    "email_address": "victor@honchodesign.com",
    "personable_type": "User",
    "title": "Chief Strategist",
    "bio": "Don’t let your dreams be dreams",
    "location": "Chicago, IL",
    "created_at": "2026-02-26T16:44:49.965Z",
    "updated_at": "2026-02-26T16:44:51.645Z",
    "admin": true,
    "owner": true,
    "client": false,
    "employee": true,
    "time_zone": "America/Chicago",
    "avatar_url": "https://3.basecampapi.com/195539477/people/BAhpBMlkkT4=--5fe7b70fbee7a7f0e2e1e19df7579e5d880c753d/avatar",
    "company": {
      "id": 1033447817,
      "name": "Honcho Design"
    },
    "can_ping": true,
    "can_manage_projects": true,
    "can_manage_people": true,
    "can_access_timesheet": true,
    "can_access_hill_charts": true
  },
  "date": "2026-02-26",
  "description": "API docs example",
  "hours": "1.5",
  "person": {
    "id": 1049715913,
    "attachable_sgid": "BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiK2dpZDovL2JjMy9QZXJzb24vMTA0OTcxNTkxMz9leHBpcmVzX2luBjsAVEkiCHB1cgY7AFRJIg9hdHRhY2hhYmxlBjsAVA==--e627c45e6b34e08862da23906862412620e4d5d9",
    "name": "Victor Cooper",
    "email_address": "victor@honchodesign.com",
    "personable_type": "User",
    "title": "Chief Strategist",
    "bio": "Don’t let your dreams be dreams",
    "location": "Chicago, IL",
    "created_at": "2026-02-26T16:44:49.965Z",
    "updated_at": "2026-02-26T16:44:51.645Z",
    "admin": true,
    "owner": true,
    "client": false,
    "employee": true,
    "time_zone": "America/Chicago",
    "avatar_url": "https://3.basecampapi.com/195539477/people/BAhpBMlkkT4=--5fe7b70fbee7a7f0e2e1e19df7579e5d880c753d/avatar",
    "company": {
      "id": 1033447817,
      "name": "Honcho Design"
    },
    "can_ping": true,
    "can_manage_projects": true,
    "can_manage_people": true,
    "can_access_timesheet": true,
    "can_access_hill_charts": true
  }
}
Copy as cURL
curl -s -H "Authorization: Bearer $ACCESS_TOKEN" -H "Content-Type: application/json" \
  -d '{"date":"2024-05-16","hours":"1:30","description":"Client meeting prep"}' \
  https://3.basecampapi.com/$ACCOUNT_ID/recordings/2/timesheet/entries.json

Update a timesheet entry

  • PUT /timesheet_entries/2.json allows changing the timesheet entry with an ID of 2.

This endpoint will return 200 OK with the current JSON representation of the timesheet entry if the update was a success. See the Get timesheet for a project endpoint for more info on the payload.

Optional parameters: Only pass the parameters you want to change.

  • date - the date the time was spent (ISO 8601).
  • hours - the number of hours. Accepts decimal (1.5) or time format (1:30).
  • description - a note about the work performed.
  • person_id - the person the time is for. Must be a non-client member of the project.
Example JSON Request
{
  "hours": "2.5",
  "description": "Updated description"
}
Example JSON Response
{
  "id": 1069479848,
  "status": "active",
  "visible_to_clients": false,
  "created_at": "2026-02-26T16:46:14.812Z",
  "updated_at": "2026-02-26T16:46:15.665Z",
  "title": "Timesheet entry",
  "inherits_status": true,
  "type": "Timesheet::Entry",
  "url": "https://3.basecampapi.com/195539477/projects/2085958504/timesheet/entries/1069479848.json",
  "app_url": "https://3.basecamp.com/195539477/projects/2085958504/timesheet/entries/1069479848",
  "bookmark_url": "https://3.basecampapi.com/195539477/my/bookmarks/BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiLmdpZDovL2JjMy9SZWNvcmRpbmcvMTA2OTQ3OTg0OD9leHBpcmVzX2luBjsAVEkiCHB1cgY7AFRJIg1yZWFkYWJsZQY7AFQ=--c0d1292c53eef3e210b24fbd2ad16864dae8875f.json",
  "parent": {
    "id": 1069479406,
    "title": "We won Leto!",
    "type": "Message",
    "url": "https://3.basecampapi.com/195539477/buckets/2085958504/messages/1069479406.json",
    "app_url": "https://3.basecamp.com/195539477/buckets/2085958504/messages/1069479406"
  },
  "bucket": {
    "id": 2085958504,
    "name": "The Leto Laptop",
    "type": "Project"
  },
  "creator": {
    "id": 1049715913,
    "attachable_sgid": "BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiK2dpZDovL2JjMy9QZXJzb24vMTA0OTcxNTkxMz9leHBpcmVzX2luBjsAVEkiCHB1cgY7AFRJIg9hdHRhY2hhYmxlBjsAVA==--e627c45e6b34e08862da23906862412620e4d5d9",
    "name": "Victor Cooper",
    "email_address": "victor@honchodesign.com",
    "personable_type": "User",
    "title": "Chief Strategist",
    "bio": "Don’t let your dreams be dreams",
    "location": "Chicago, IL",
    "created_at": "2026-02-26T16:44:49.965Z",
    "updated_at": "2026-02-26T16:44:51.645Z",
    "admin": true,
    "owner": true,
    "client": false,
    "employee": true,
    "time_zone": "America/Chicago",
    "avatar_url": "https://3.basecampapi.com/195539477/people/BAhpBMlkkT4=--5fe7b70fbee7a7f0e2e1e19df7579e5d880c753d/avatar",
    "company": {
      "id": 1033447817,
      "name": "Honcho Design"
    },
    "can_ping": true,
    "can_manage_projects": true,
    "can_manage_people": true,
    "can_access_timesheet": true,
    "can_access_hill_charts": true
  },
  "date": "2026-02-26",
  "description": "Updated via API",
  "hours": "2.5",
  "person": {
    "id": 1049715913,
    "attachable_sgid": "BAh7BkkiC19yYWlscwY6BkVUewdJIglkYXRhBjsAVEkiK2dpZDovL2JjMy9QZXJzb24vMTA0OTcxNTkxMz9leHBpcmVzX2luBjsAVEkiCHB1cgY7AFRJIg9hdHRhY2hhYmxlBjsAVA==--e627c45e6b34e08862da23906862412620e4d5d9",
    "name": "Victor Cooper",
    "email_address": "victor@honchodesign.com",
    "personable_type": "User",
    "title": "Chief Strategist",
    "bio": "Don’t let your dreams be dreams",
    "location": "Chicago, IL",
    "created_at": "2026-02-26T16:44:49.965Z",
    "updated_at": "2026-02-26T16:44:51.645Z",
    "admin": true,
    "owner": true,
    "client": false,
    "employee": true,
    "time_zone": "America/Chicago",
    "avatar_url": "https://3.basecampapi.com/195539477/people/BAhpBMlkkT4=--5fe7b70fbee7a7f0e2e1e19df7579e5d880c753d/avatar",
    "company": {
      "id": 1033447817,
      "name": "Honcho Design"
    },
    "can_ping": true,
    "can_manage_projects": true,
    "can_manage_people": true,
    "can_access_timesheet": true,
    "can_access_hill_charts": true
  }
}
Copy as cURL
curl -s -H "Authorization: Bearer $ACCESS_TOKEN" -H "Content-Type: application/json" \
  -X PUT -d '{"hours":"2.5","description":"Updated description"}' \
  https://3.basecampapi.com/$ACCOUNT_ID/timesheet_entries/2.json

Delete a timesheet entry

  • DELETE /timesheet_entries/2.json will delete the timesheet entry with an ID of 2.

This endpoint will return 204 No Content if the delete was successful. No parameters are required.

The entry is permanently deleted and cannot be recovered.

Copy as cURL
curl -s -H "Authorization: Bearer $ACCESS_TOKEN" -X DELETE \
  https://3.basecampapi.com/$ACCOUNT_ID/timesheet_entries/2.json

Legacy project-scoped routes

The following project-scoped routes are still supported and will remain available, but flat routes above are the canonical form for new integrations.