Clockify API

Clockify API

Quick reference for working with Clockify's REST API.

Authentication

Use X-Api-Key header for all requests:

headers: {
  'X-Api-Key': apiKey,
  'Content-Type': 'application/json'
}

For subdomain workspaces (e.g., subdomain.clockify.me), generate a workspace-specific API key in Profile Settings.

No org-level keys exist. To fetch data for other team members, use an API key from a user with Admin/Owner permissions—that key effectively acts as the "organization key."

Base URLs

• Global API: https://api.clockify.me/api/v1
• Regional prefixes: euc1 (EU), use2 (USA), euw2 (UK), apse2 (AU)
  • Example: https://euc1.clockify.me/api/v1

Key Endpoints

Projects

GET all projects:

GET /workspaces/{workspaceId}/projects

GET single project:

GET /workspaces/{workspaceId}/projects/{projectId}

Query parameters:

• hydrated=true - Returns full project data including memberships (default: false)
• archived=true - Filter archived projects
• page=1 - Page number (default: 1)
• page-size=50 - Results per page (default: 50, max varies)

Users

GET all workspace users:

GET /workspaces/{workspaceId}/users

Query parameters:

• include-memberships=true - Include user's workspace/project/group memberships
• status=ACTIVE - Filter by status (PENDING/ACTIVE/DECLINED/INACTIVE/ALL)
• project-id={projectId} - Users with access to specific project

Time Entries

GET user's time entries:

GET /workspaces/{workspaceId}/user/{userId}/time-entries

POST new time entry:

POST /workspaces/{workspaceId}/time-entries

⚠️ Timezone trap: This endpoint interprets start/end filter params as your profile's local time even if you include Z (UTC), but returns timestamps in UTC. This creates a double-conversion problem. For reliable date filtering, use the Reports API instead (see below).

Reports API (Recommended for Time Queries)

Base URL: https://reports.api.clockify.me/v1

POST /workspaces/{workspaceId}/reports/summary
POST /workspaces/{workspaceId}/reports/detailed

Use "timeZone": "UTC" in the request body to bypass user profile timezone ambiguity:

{
  "dateRangeStart": "2023-01-01T00:00:00Z",
  "dateRangeEnd": "2023-01-31T23:59:59Z",
  "timeZone": "UTC"
}

Filtering by user: Don't use users: { ids: [...] } in the body—returns empty. Instead, use summaryFilter: { groups: ['USER', 'PROJECT'] } and find the user by _id in groupOne. Projects are in children with duration in seconds.

Important Patterns

Timestamps Are Always UTC

All API responses return timestamps in UTC (ISO 8601 with Z suffix). The API ignores workspace and user profile timezone settings—convert to local time client-side.

The hydrated=true Parameter

Critical for project memberships:

• Without it: Project response excludes membership details
• With it: Returns full project object including memberships array with user assignments

Example:

// Get project with full membership data
const url = `${baseUrl}/workspaces/${workspaceId}/projects/${projectId}?hydrated=true`;

Rate Limiting

• 50 requests/second when using X-Addon-Token
• Returns "Too many requests" error if exceeded

Pagination

Most list endpoints support:

• page - Page number (1-indexed)
• page-size - Results per page

Common Filters

Projects support filtering by:

• name - Partial match (or strict-name-search=true for exact)
• clients - Array of client IDs
• users - Array of user IDs
• billable - Boolean filter

Response Format

All responses return JSON. Check response status codes:

• 200/201 - Success
• 400 - Bad request
• 401 - Unauthorized (check API key)
• 403 - Forbidden
• 404 - Not found
• 429 - Rate limit exceeded