---
updatedAt: 2026-10-07T13:58:45.000Z
agentTools:
  projectIndex: https://developer.intellistack.com/llms.txt
---

# Add users and/or groups to project

Update a project membership by adding users and/or groups

# OpenAPI definition

```json
{
  "components": {
    "schemas": {
      "ProjectMembershipRequest": {
        "properties": {
          "groupIds": {
            "items": {
              "format": "uuid",
              "type": "string"
            },
            "type": "array"
          },
          "projectName": {
            "type": "string"
          },
          "userIds": {
            "items": {
              "format": "uuid",
              "type": "string"
            },
            "type": "array"
          }
        },
        "type": "object"
      }
    },
    "securitySchemes": {
      "bearerAuth": {
        "bearerFormat": "JWT",
        "scheme": "bearer",
        "type": "http"
      }
    }
  },
  "info": {
    "description": "API documentation for Core Services",
    "title": "User Management API",
    "version": "0.0.0"
  },
  "openapi": "3.0.0",
  "paths": {
    "/v1/project-memberships/{projectId}/add": {
      "put": {
        "description": "Update a project membership by adding users and/or groups",
        "operationId": "addToProjectMembership",
        "parameters": [
          {
            "in": "path",
            "name": "projectId",
            "required": true,
            "schema": {
              "format": "uuid",
              "type": "string"
            }
          }
        ],
        "requestBody": {
          "content": {
            "application/json": {
              "schema": {
                "$ref": "#/components/schemas/ProjectMembershipRequest"
              }
            }
          },
          "required": true
        },
        "responses": {
          "200": {
            "description": "Project membership updated successfully"
          }
        },
        "security": [
          {
            "bearerAuth": []
          }
        ],
        "summary": "Add users and/or groups to project",
        "tags": [
          "Project Memberships"
        ]
      }
    }
  },
  "servers": [
    {
      "description": "US Production Server",
      "url": "https://api-us.streamline.intellistack.ai"
    },
    {
      "description": "Canada Production Server",
      "url": "https://api-ca.streamline.intellistack.ai"
    }
  ]
}
```