How do I use fireMCP (Braze Write Server)?

1. Click on "Install Server". 2. Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state. 3. In the chat, type @ followed by the MCP server name and your instructions, e.g., "@fireMCP (Braze Write Server) update user_12345's subscription_tier to 'premium' in dry run mode" That's it! The server will respond to your query, and you can continue using it as needed. Here is a step-by-step guide with screenshots.

MCP Write Server

A NON-OFFICIAL write-enabled extension of the official Braze MCP server, designed for Solution Engineers to create demos, trigger campaigns, and manage test environments.

⚠️ Important Safety Notice

This server enables WRITE OPERATIONS to your Braze workspace. It includes multiple safety mechanisms:

Workspace validation: Only works with demo/POC/test workspaces by default
Rate limiting: Prevents accidental spam
Dry run mode: Test operations without making changes
Confirmation requirements: Destructive operations need explicit confirmation
Production blocking: Prevents writes to production workspaces unless explicitly enabled

Features

Write Operations

✅ User profile management (attributes, events, purchases)
✅ Campaign triggering and management
✅ Canvas triggering and management
✅ Catalog item management
✅ Content block management
✅ User deletion and identification

Safety Features

✅ Environment-based workspace validation
✅ Rate limiting per operation type
✅ Dry run mode for all operations
✅ Confirmation requirements for destructive operations
✅ Comprehensive logging and audit trail

Installation

pip install -e .

Or with uv:

uv pip install -e .

Configuration

Environment Variables

# Required
BRAZE_API_KEY=your-api-key-here
BRAZE_BASE_URL=https://rest.iad-01.braze.com

# Safety Configuration
BRAZE_WRITE_ENABLED=true                    # Enable write operations
BRAZE_ALLOW_PRODUCTION=false                # Block production workspaces
BRAZE_ALLOWED_WORKSPACES=demo-,poc-,test-  # Allowed workspace patterns
BRAZE_DRY_RUN_DEFAULT=false                 # Default dry run mode

# Rate Limits
BRAZE_MAX_SENDS_PER_HOUR=1000              # Max campaign/canvas sends per hour
BRAZE_MAX_CATALOG_UPDATES_PER_MIN=100      # Max catalog updates per minute

MCP Client Configuration

Add to your MCP client configuration (e.g., Claude Desktop):

{
  "mcpServers": {
    "braze-write": {
      "command": "python",
      "args": ["-m", "braze_mcp_write.main"],
      "env": {
        "BRAZE_API_KEY": "your-api-key",
        "BRAZE_BASE_URL": "https://rest.iad-01.braze.com",
        "BRAZE_WRITE_ENABLED": "true",
        "BRAZE_ALLOWED_WORKSPACES": "demo-,poc-,test-"
      }
    }
  }
}

Usage Examples

Update User Attributes

await update_user_attributes(
    ctx,
    external_id="user_12345",
    attributes={
        "first_name": "John",
        "last_name": "Doe",
        "email": "[email protected]",
        "subscription_tier": "premium"
    }
)

Track Custom Event

await track_event(
    ctx,
    event_name="completed_tutorial",
    external_id="user_12345",
    properties={
        "tutorial_name": "Getting Started",
        "completion_time_seconds": 180
    }
)

Send Campaign

await send_campaign(
    ctx,
    campaign_id="your-campaign-id",
    recipients=[{
        "external_user_id": "user_12345"
    }]
)

Trigger Canvas

await trigger_canvas(
    ctx,
    canvas_id="your-canvas-id",
    recipients=[{
        "external_user_id": "user_12345"
    }],
    canvas_entry_properties={
        "promo_code": "DEMO2024"
    }
)

Dry Run Mode

Test any operation without making changes:

result = await update_user_attributes(
    ctx,
    external_id="user_12345",
    attributes={"test_field": "test_value"},
    dry_run=True  # No actual API call made
)

Architecture

braze_mcp_write/
├── models/              # Pydantic models for validation
│   ├── errors.py
│   └── responses.py
├── tools/               # MCP tool implementations
│   ├── users_write.py   # User tracking operations
│   ├── campaigns_write.py
│   ├── canvas_write.py
│   ├── catalogs_write.py
│   └── content_blocks_write.py
├── utils/               # Utilities
│   ├── context.py       # Context management
│   ├── http.py          # HTTP client
│   ├── logging.py       # Logging setup
│   └── safety.py        # Safety mechanisms
├── registry_builder.py  # Auto-discovery system
├── server.py            # FastMCP server
└── main.py              # Entry point

Development

Running Tests

pytest

Code Formatting

black .
ruff check .

Safety Best Practices

Always use demo workspaces: Set up dedicated demo workspaces with the "demo-", "poc-", or "test-" prefix in the URL
Test with dry run first: Use dry_run=True to validate operations before execution
Monitor rate limits: Be aware of Braze API rate limits for your workspace
Use confirmation for destructive ops: Operations like delete_user require confirm=True
Review logs: Check logs regularly for unexpected behavior

Differences from Official Braze MCP

This server extends the official read-only Braze MCP server with:

Write operations for campaigns, canvas, users, catalogs, and content blocks
Comprehensive safety mechanisms to prevent accidental production writes
Rate limiting to prevent API abuse
Dry run mode for testing
Enhanced logging and audit trails

License

MIT License - See LICENSE file for details

Disclaimer

This is a developer tool for creating demos and POCs. Use with caution and always verify your workspace configuration before enabling write operations.

fireMCP (Braze Write Server)