OpenProject API V3 (Stable)
You're looking at the current **stable** documentation of the OpenProject APIv3. If you're interested in the current development version, please go to [github.com/opf](https://github.com/opf/openproject/tree/dev/docs/api/apiv3). ## Introduction The documentation for the APIv3 is written according to the [OpenAPI 3.1 Specification](https://swagger.io/specification/). You can either view the static version of this documentation on the [website](https://www.openproject.org/docs/api/introduction/) or the interactive version, rendered with [OpenAPI Explorer](https://github.com/Rhosys/openapi-explor
What You Can Do
MCP Tools
view-root
View root
list-actions
List actions
view-action
View action
get-activity
Get an activity
update-activity
Update activity
list-activity-attachments
List attachments by activity
create-activity-attachment
Add attachment to activity
list-activity-emoji-reactions
List emoji reactions by activity
toggle-activity-emoji-reaction
Toggle emoji reaction for an activity
create-attachment
Create Attachment
delete-attachment
Delete attachment
view-attachment
View attachment
view-budget
view Budget
list-capabilities
List capabilities
view-global-context
View global context
view-capabilities
View capabilities
view-category
View Category
view-configuration
View configuration
get-custom-action
Get a custom action
execute-custom-action
Execute custom action
get-custom-field-items
Get the custom field hierarchy items
get-custom-field-item
Get a custom field hierarchy item
get-custom-field-item-branch
Get a custom field hierarchy item's branch
view-custom-option
View Custom Option
list-non-working-days
Lists all non working days
create-non-working-day
Creates a non-working day (NOT IMPLEMENTED)
view-non-working-day
View a non-working day
update-non-working-day
Update a non-working day attributes (NOT IMPLEMENTED)
delete-non-working-day
Removes a non-working day (NOT IMPLEMENTED)
list-week-days
Lists week days
update-week-days
Update week days (NOT IMPLEMENTED)
view-week-day
View a week day
update-week-day
Update a week day attributes (NOT IMPLEMENTED)
list-days
Lists days
view-day
View day
list-documents
List Documents
view-document
View document
update-document
Update document
show-or-validate-form
show or validate form
view-the-schema
view the schema
view-aggregated-result
view aggregated result
view-file-link
Gets a file link.
delete-file-link
Removes a file link.
open-file-link
Creates an opening uri of the linked file.
download-file-link
Creates a download uri of the linked file.
list-grids
List grids
create-grid
Create a grid
grid-create-form
Grid Create Form
get-grid
Get a grid
update-grid
Update a grid
grid-update-form
Grid Update Form
list-groups
List groups
create-group
Create group
delete-group
Delete group
get-group
Get group
update-group
Update group
list-help-texts
List help texts
get-help-text
Get help text
list-meetings
List all visible meetings
get-meeting
Get a meeting