Zoho Projects

Access the Zoho Projects API with managed OAuth authentication. Manage projects, tasks, milestones, tasklists, and team collaboration.

Quick Start

# List all portals
python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/zoho-projects/restapi/portals/')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Base URL

https://api.maton.ai/zoho-projects/{native-api-path}

Maton proxies requests to projectsapi.zoho.com and automatically injects your OAuth token.

Authentication

All requests require the Maton API key in the Authorization header:

Authorization: Bearer $MATON_API_KEY

Environment Variable: Set your API key as MATON_API_KEY:

export MATON_API_KEY="YOUR_API_KEY"

Getting Your API Key

1. Sign in or create an account at maton.ai
2. Go to maton.ai/settings
3. Copy your API key

Connection Management

Manage your Zoho Projects OAuth connections at https://api.maton.ai.

List Connections

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/connections?app=zoho-projects&status=ACTIVE')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Create Connection

python <<'EOF'
import urllib.request, os, json
data = json.dumps({'app': 'zoho-projects'}).encode()
req = urllib.request.Request('https://api.maton.ai/connections', data=data, method='POST')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
req.add_header('Content-Type', 'application/json')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Get Connection

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/connections/{connection_id}')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Response:

{
  "connection": {
    "connection_id": "{connection_id}",
    "status": "ACTIVE",
    "creation_time": "2026-02-28T00:12:25.223434Z",
    "last_updated_time": "2026-02-28T00:16:32.882675Z",
    "url": "https://connect.maton.ai/?session_token=...",
    "app": "zoho-projects",
    "metadata": {},
    "method": "OAUTH2"
  }
}

Open the returned url in a browser to complete OAuth authorization.

Delete Connection

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/connections/{connection_id}', method='DELETE')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Specifying Connection

If you have multiple Zoho Projects connections, specify which one to use with the Maton-Connection header:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/zoho-projects/restapi/portals/')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
req.add_header('Maton-Connection', '{connection_id}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

If you have multiple connections, always include this header to ensure requests go to the intended account.

Security & Permissions

• Access is scoped to projects, tasks, milestones, tasklists, and team collaboration within the connected Zoho Projects account.
• All write operations require explicit user approval. Before executing any create, update, or delete call, confirm the target resource and intended effect with the user.

API Reference

Portals

List Portals

GET /zoho-projects/restapi/portals/

Response:

{
  "portals": [
    {
      "id": 916020774,
      "id_string": "916020774",
      "name": "nunchidotapp",
      "plan": "Ultimate",
      "role": "admin",
      "project_count": {"active": 1}
    }
  ]
}

Get Portal Details

GET /zoho-projects/restapi/portal/{portal_id}/

Projects

List Projects

GET /zoho-projects/restapi/portal/{portal_id}/projects/

Query parameters: index, range, status, sort_column, sort_order

Response:

{
  "projects": [
    {
      "id": 2644874000000089119,
      "name": "My Project",
      "status": "active",
      "owner_name": "Byungkyu Park",
      "task_count": {"open": 3, "closed": 0},
      "project_percent": "0"
    }
  ]
}

Get Project Details

GET /zoho-projects/restapi/portal/{portal_id}/projects/{project_id}/

Create Project

POST /zoho-projects/restapi/portal/{portal_id}/projects/
Content-Type: application/x-www-form-urlencoded

name=New+Project&owner={user_id}&description=Project+description

Required: name Optional: owner, description, start_date, end_date, template_id, group_id

Response:

{
  "projects": [
    {
      "id": 2644874000000096003,
      "name": "New Project",
      "status": "active"
    }
  ]
}

Update Project

POST /zoho-projects/restapi/portal/{portal_id}/projects/{project_id}/
Content-Type: application/x-www-form-urlencoded

name=Updated+Name&status=active

Delete Project

DELETE /zoho-projects/restapi/portal/{portal_id}/projects/{project_id}/

Response:

{"response": "Project Trashed successfully"}

Tasks

List Tasks

GET /zoho-projects/restapi/portal/{portal_id}/projects/{project_id}/tasks/

Query parameters: index, range, owner, status, priority, tasklist_id, sort_column

Response:

{
  "tasks": [
    {
      "id": 2644874000000089255,
      "name": "Task 3",
      "status": {"name": "Open", "type": "open"},
      "priority": "None",
      "completed": false,
      "tasklist": {"name": "General", "id": "2644874000000089245"}
    }
  ]
}

Get Task Details

GET /zoho-projects/restapi/portal/{portal_id}/projects/{project_id}/tasks/{task_id}/

Get My Tasks

GET /zoho-projects/restapi/portal/{portal_id}/mytasks/

Query parameters: index, range, owner, status, priority, projects_ids

Create Task

POST /zoho-projects/restapi/portal/{portal_id}/projects/{project_id}/tasks/
Content-Type: application/x-www-form-urlencoded

name=New+Task&tasklist_id={tasklist_id}&priority=High

Required: name Optional: person_responsible, tasklist_id, start_date, end_date, priority, description

Response:

{
  "tasks": [
    {
      "id": 2644874000000094001,
      "key": "EZ1-T4",
      "name": "New Task",
      "status": {"name": "Open", "type": "open"}
    }
  ]
}

Update Task

POST /zoho-projects/restapi/portal/{portal_id}/projects/{project_id}/tasks/{task_id}/
Content-Type: application/x-www-form-urlencoded

name=Updated+Name&priority=High&percent_complete=50

Delete Task

DELETE /zoho-projects/restapi/portal/{portal_id}/projects/{project_id}/tasks/{task_id}/

Response:

{"response": "Task Trashed successfully"}

Task Comments

List Comments

GET /zoho-projects/restapi/portal/{portal_id}/projects/{project_id}/tasks/{task_id}/comments/

Add Comment

POST /zoho-projects/restapi/portal/{portal_id}/projects/{project_id}/tasks/{task_id}/comments/
Content-Type: application/x-www-form-urlencoded

content=This+is+a+comment

Response:

{
  "comments": [
    {
      "id": 2644874000000094015,
      "content": "This is a comment",
      "added_person": "Byungkyu Park"
    }
  ]
}

Update Comment

POST /zoho-projects/restapi/portal/{portal_id}/projects/{project_id}/tasks/{task_id}/comments/{comment_id}/
Content-Type: application/x-www-form-urlencoded

content=Updated+comment

Delete Comment

DELETE /zoho-projects/restapi/portal/{portal_id}/projects/{project_id}/tasks/{task_id}/comments/{comment_id}/

Tasklists

List Tasklists

GET /zoho-projects/restapi/portal/{portal_id}/projects/{project_id}/tasklists/

Query parameters: index, range, flag, milestone_id, sort_column

Response:

{
  "tasklists": [
    {
      "id": 2644874000000089245,
      "name": "General",
      "flag": "internal",
      "is_default": true,
      "task_count": {"open": 3}
    }
  ]
}

Create Tasklist

POST /zoho-projects/restapi/portal/{portal_id}/projects/{project_id}/tasklists/
Content-Type: application/x-www-form-urlencoded

name=New+Tasklist&flag=internal

Required: name Optional: milestone_id, flag

Update Tasklist

POST /zoho-projects/restapi/portal/{portal_id}/projects/{project_id}/tasklists/{tasklist_id}/
Content-Type: application/x-www-form-urlencoded

name=Updated+Name&milestone_id={milestone_id}

Delete Tasklist

DELETE /zoho-projects/restapi/portal/{portal_id}/projects/{project_id}/tasklists/{tasklist_id}/

Response:

{"response": "Tasklist Trashed successfully"}

Milestones

List Milestones

GET /zoho-projects/restapi/portal/{portal_id}/projects/{project_id}/milestones/

Query parameters: index, range, status, flag, sort_column

Note: Returns 204 No Content if no milestones exist.

Create Milestone

POST /zoho-projects/restapi/portal/{portal_id}/projects/{project_id}/milestones/
Content-Type: application/x-www-form-urlencoded

name=Phase+1&start_date=03-01-2026&end_date=03-15-2026&owner={user_id}&flag=internal

Required: name, start_date, end_date, owner, flag

Response:

{
  "milestones": [
    {
      "id": 2644874000000096133,
      "name": "Phase 1",
      "start_date": "03-01-2026",
      "end_date": "03-15-2026",
      "status": "notcompleted"
    }
  ]
}

Update Milestone

POST /zoho-projects/restapi/portal/{portal_id}/projects/{project_id}/milestones/{milestone_id}/
Content-Type: application/x-www-form-urlencoded

name=Updated+Phase&start_date=03-01-2026&end_date=03-20-2026&owner={user_id}&flag=internal

Update Milestone Status

POST /zoho-projects/restapi/portal/{portal_id}/projects/{project_id}/milestones/{milestone_id}/status/
Content-Type: application/x-www-form-urlencoded

status=2

Status values: 1 = not completed, 2 = completed

Delete Milestone

DELETE /zoho-projects/restapi/portal/{portal_id}/projects/{project_id}/milestones/{milestone_id}/

Response:

{"response": "Milestone Trashed successfully"}

Users

List Users

GET /zoho-projects/restapi/portal/{portal_id}/users/

Response:

{
  "users": [
    {
      "id": "801698114",
      "zpuid": "2644874000000085003",
      "name": "Byungkyu Park",
      "email": "byungkyu@example.com",
      "role_name": "Administrator",
      "active": true
    }
  ]
}

Project Groups

List Groups

GET /zoho-projects/restapi/portal/{portal_id}/projects/groups

Response:

{
  "groups": [
    {
      "id": "2644874000000018001",
      "name": "Ungrouped Projects",
      "is_default": "true"
    }
  ]
}

Create Group

POST /zoho-projects/restapi/portal/{portal_id}/projectgroups
Content-Type: application/x-www-form-urlencoded

name=New+Group

Pagination

Use index and range parameters for pagination:

GET /zoho-projects/restapi/portal/{portal_id}/projects/{project_id}/tasks/?index=1&range=50

• index: Starting record number (1-based)
• range: Number of records to return

Code Examples

JavaScript

// List tasks in a project
const response = await fetch(
  'https://api.maton.ai/zoho-projects/restapi/portal/916020774/projects/2644874000000089119/tasks/',
  {
    headers: {
      'Authorization': `Bearer ${process.env.MATON_API_KEY}`
    }
  }
);
const data = await response.json();
console.log(data.tasks);

Python

import os
import requests

# Create a task
response = requests.post(
    'https://api.maton.ai/zoho-projects/restapi/portal/916020774/projects/2644874000000089119/tasks/',
    headers={
        'Authorization': f'Bearer {os.environ["MATON_API_KEY"]}',
        'Content-Type': 'application/x-www-form-urlencoded'
    },
    data={'name': 'New Task', 'priority': 'High'}
)
task = response.json()
print(task['tasks'][0]['id'])

Notes

• All POST requests for create/update use application/x-www-form-urlencoded content type, not JSON
• Portal ID is required for most endpoints and can be obtained from GET /restapi/portals/
• Date format is MM-dd-yyyy (e.g., 03-01-2026)
• Milestone creation requires all fields: name, start_date, end_date, owner, flag
• Empty list responses return HTTP 204 No Content
• Deleted items are moved to trash, not permanently deleted

Error Handling

Common error codes:

• 6831: Input Parameter Missing
• 6832: Input Parameter Does not Match the Pattern Specified

Troubleshooting: API Key Issues

1. Check that the MATON_API_KEY environment variable is set:

echo $MATON_API_KEY

2. Verify the API key is valid by listing connections:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/connections')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Troubleshooting: Invalid App Name

Ensure your URL path starts with zoho-projects. For example:

• Correct: https://api.maton.ai/zoho-projects/restapi/portals/
• Incorrect: https://api.maton.ai/restapi/portals/

Resources

• Zoho Projects API Documentation
• Projects API
• Tasks API
• Milestones API
• Maton Community
• Maton Support