Firebase MCP Server

MCP server for inspecting Firebase Emulator Firestore and function logs.

Setup

npm install
npm run build

Config

Copy .env.example to .env and adjust:

FIRESTORE_EMULATOR_HOST=localhost:8080
FIREBASE_PROJECT_ID=demo-project
FIREBASE_EMULATOR_HUB=localhost:4000

Usage with Claude Desktop

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "firebase": {
      "command": "node",
      "args": ["/path/to/firebase_mcp_server/dist/index.js"],
      "env": {
        "FIRESTORE_EMULATOR_HOST": "localhost:8080",
        "FIREBASE_PROJECT_ID": "your-project-id",
        "FIREBASE_EMULATOR_HUB": "localhost:4000"
      }
    }
  }
}

Tools

Tool	Description
list_collections	List top-level Firestore collections
list_subcollections	List subcollections of a document
list_documents	List documents in a collection
get_document	Get a single document by path
query_collection	Query with filters, ordering, limit
get_function_logs	Get function logs with grep-style filtering

get_function_logs options

• pattern - Regex to filter log messages
• level - DEBUG/INFO/WARN/ERROR
• functionName - Filter by function name
• limit - Max entries (default 50)
• since - ISO timestamp cutoff