# Capital Check In API > API documentation for Capital Check In platform - Employee check-in management system ## Docs - [API Introduction](https://docs.capitalcheckin.app/api-reference/api/introduction.md): Introduction to the Capital Check In API endpoints - [Authentication](https://docs.capitalcheckin.app/api-reference/authentication.md): Learn how to authenticate with the Capital Check In API using OAuth2 - [Add multiple collaborators](https://docs.capitalcheckin.app/api-reference/collaborators/add-multiple-collaborators.md): Add multiple collaborators from import data - [Assign role](https://docs.capitalcheckin.app/api-reference/collaborators/assign-role.md): Assign a role to a collaborator - [Create collaborator](https://docs.capitalcheckin.app/api-reference/collaborators/create-collaborator.md): Create a new collaborator in the company - [Delete collaborator](https://docs.capitalcheckin.app/api-reference/collaborators/delete-collaborator.md): Delete a collaborator from the company - [Download import template](https://docs.capitalcheckin.app/api-reference/collaborators/download-import-template.md): Download Excel template for bulk collaborator import - [Export by collaborator](https://docs.capitalcheckin.app/api-reference/collaborators/export-by-collaborator.md): Export specific collaborator data - [Export by group](https://docs.capitalcheckin.app/api-reference/collaborators/export-by-group.md): Export collaborators data by group - [Export by list](https://docs.capitalcheckin.app/api-reference/collaborators/export-by-list.md): Export collaborators data by list - [Get collaborator by ID](https://docs.capitalcheckin.app/api-reference/collaborators/get-collaborator-by-id.md): Retrieve a specific collaborator by ID - [Get collaborator documents](https://docs.capitalcheckin.app/api-reference/collaborators/get-collaborator-documents.md): Retrieve documents for a specific collaborator - [Get collaborators](https://docs.capitalcheckin.app/api-reference/collaborators/get-collaborators.md): Retrieve a list of collaborators with optional filtering and pagination - [Get notification preferences](https://docs.capitalcheckin.app/api-reference/collaborators/get-notification-preferences.md): Retrieve notification preferences for a collaborator - [Get single collaborator history](https://docs.capitalcheckin.app/api-reference/collaborators/get-single-collaborator-history.md): Retrieve history for a specific collaborator - [Get single collaborator status](https://docs.capitalcheckin.app/api-reference/collaborators/get-single-collaborator-status.md): Retrieve current status for a specific collaborator - [Resend invitation](https://docs.capitalcheckin.app/api-reference/collaborators/resend-invitation.md): Resend invitation email to a collaborator - [Update collaborator](https://docs.capitalcheckin.app/api-reference/collaborators/update-collaborator.md): Update an existing collaborator's information - [Update notification preferences](https://docs.capitalcheckin.app/api-reference/collaborators/update-notification-preferences.md): Update notification preferences for a collaborator - [Update profile photo](https://docs.capitalcheckin.app/api-reference/collaborators/update-profile-photo.md): Update collaborator's profile photo - [Upload document](https://docs.capitalcheckin.app/api-reference/collaborators/upload-document.md): Upload a document for a collaborator - [Upload import template](https://docs.capitalcheckin.app/api-reference/collaborators/upload-import-template.md): Upload Excel file with collaborator data for bulk import - [Errors](https://docs.capitalcheckin.app/api-reference/errors.md): Learn how to handle errors in the Capital Check In API - [Introduction](https://docs.capitalcheckin.app/api-reference/introduction.md): Capital Check In API documentation - Employee check-in management system - [Pagination](https://docs.capitalcheckin.app/api-reference/pagination.md): Learn how to handle pagination in the Capital Check In API - [Rate Limiting](https://docs.capitalcheckin.app/api-reference/ratelimiting.md): Learn about rate limiting in the Capital Check In API - [Get user profile](https://docs.capitalcheckin.app/api-reference/users/get-user-profile.md): Get information of the authenticated user using OAuth2 access token - [OAuth2 Authorization Code](https://docs.capitalcheckin.app/authentication/oauth2.md): Implementación de OAuth2 Authorization Code Grant en Capital Check In API - [Changelog](https://docs.capitalcheckin.app/changelog.md): Actualizaciones y mejoras del producto Capital Check In - [Capital Check In API](https://docs.capitalcheckin.app/index.md): Complete documentation for Capital Check In API - Employee check-in management system - [Quickstart](https://docs.capitalcheckin.app/quickstart.md): Set up your first integration with Capital Check In API in minutes ## OpenAPI Specs - [openapi](https://docs.capitalcheckin.app/api-reference/openapi.json) ## Optional - [Documentation](https://capitalcheckin.app/docs) - [Community](https://capitalcheckin.app/community) - [Blog](https://capitalcheckin.app/blog)