cn-mcp 0.2.3

Python SDK for CircuitNotion MCP Server

CircuitNotion MCP SDK

A simple Python SDK for interacting with the CircuitNotion MCP Server.

Installation

pip install cn-mcp

Or from source:

pip install -e .

Quick Start

from cn_mcp_sdk import MCPClient

# Initialize client
client = MCPClient(api_key="your-api-key", base_url="http://localhost:8000")

# Create a session
session = client.sessions.create()
print(f"Session ID: {session['session_id']}")

# Write a file
file_resp = client.files.write(
    session_id=session['session_id'],
    path="/output/hello.txt",
    content="Hello, World!"
)
print(f"File ID: {file_resp['file_id']}")

# List files
files = client.files.list(session_id=session['session_id'])
for f in files:
    print(f"  {f['path']} ({f['bytes']} bytes)")

# Execute a terminal command
result = client.terminal.execute(
    session_id=session['session_id'],
    command="echo 'Hello' && ls -la",
    timeout_minutes=5
)
print(f"Exit code: {result['exit_code']}")
print(f"Output: {result['stdout']}")

# Search the web
search_results = client.search.web("Python best practices")
for result in search_results:
    print(f"  {result['title']}: {result['url']}")

# Schedule a task
task = client.scheduler.schedule(
    in_seconds=60,
    payload={"message": "Task executed!"}
)
print(f"Task ID: {task['task_id']}")

# Control a device
device_result = client.devices.execute(
    device_id="device-123",
    action="turn_on",
    parameters={"brightness": 100}
)

# Query the database
rows = client.db.query(
    session_id=session['session_id'],
    sql="SELECT * FROM users LIMIT 10"
)

# Dispose session
client.sessions.dispose(session['session_id'])

API Documentation

Sessions

# Create a session
session = client.sessions.create()

# List active sessions
sessions = client.sessions.list()

# Dispose a session
client.sessions.dispose(session_id)

Files

# Write a file
file_resp = client.files.write(session_id, path, content)

# List files in a session
files = client.files.list(session_id)

# Download a file
content = client.files.download(file_id)

# Delete a file
client.files.delete(file_id)

Terminal

# Execute a command
result = client.terminal.execute(
    session_id=session_id,
    command="pip list",
    timeout_minutes=5,
    output_limit_kb=4096
)
# Returns: {
#   "exit_code": 0,
#   "stdout": "...",
#   "stderr": "",
#   "duration_seconds": 1.23
# }

Search

# Web search
results = client.search.web("Python")

# With location
results = client.search.web("restaurants", location="New York")

# Returns: [
#   {
#     "title": "...",
#     "url": "...",
#     "snippet": "...",
#     "position": 1
#   },
#   ...
# ]

Scheduler

# Schedule a task in N seconds
task = client.scheduler.schedule(
    in_seconds=300,
    payload={"data": "value"}
)

# Schedule at specific time (ISO format)
task = client.scheduler.schedule(
    run_at="2026-04-08T15:30:00Z",
    payload={"data": "value"}
)

# List tasks
tasks = client.scheduler.list()

# Cancel a task
client.scheduler.cancel(task_id)

Devices

# Control a device
result = client.devices.execute(
    device_id="device-123",
    action="turn_on",
    parameters={"level": 80}
)

Database

# Query (read-only)
rows = client.db.query(
    session_id=session_id,
    sql="SELECT * FROM table"
)

# Execute (write operations)
result = client.db.execute(
    session_id=session_id,
    sql="INSERT INTO table (col) VALUES (?)",
    params=["value"]
)

Cache Stats

# Get API key cache statistics
stats = client.auth.cache_stats()
# Returns: {
#   "size": 45,
#   "max_size": 1000,
#   "ttl_seconds": 300,
#   "negative_ttl_seconds": 30
# }

Configuration

Via Constructor

client = MCPClient(
    api_key="your-api-key",
    base_url="http://localhost:8000",
    timeout=30,
    verify_ssl=True
)

Via Environment Variables

export MCP_API_KEY=your-api-key
export MCP_BASE_URL=http://localhost:8000
export MCP_TIMEOUT=30
export MCP_VERIFY_SSL=true

# Uses env vars by default
client = MCPClient()

Error Handling

from cn_mcp_sdk import MCPClient, MCPError, MCPAuthError, MCPNotFoundError

try:
    session = client.sessions.create()
except MCPAuthError as e:
    print(f"Authentication failed: {e}")
except MCPNotFoundError as e:
    print(f"Resource not found: {e}")
except MCPError as e:
    print(f"API error: {e}")

Examples

See the examples/ directory for more detailed examples:

• basic_usage.py - Basic session and file operations
• terminal_commands.py - Running terminal commands
• web_search.py - Web search functionality
• scheduled_tasks.py - Scheduling and managing tasks
• device_control.py - Controlling devices
• database_queries.py - Database operations

License

MIT