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Firebase MCP Integration for LangGraph

Connect Firebase to LangGraph through the local KosmoKrator MCP gateway with scoped tools, credentials, and write policy.

7 functions 7 read 0 write Manual OAuth token auth
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Connect Firebase to LangGraph

Run KosmoKrator integration calls from LangGraph nodes while preserving local credentials and permissions.

Use a graph node that calls the KosmoKrator CLI for deterministic steps or an MCP client for dynamic tool selection. The gateway is local, scoped to this integration, and starts with --write=deny so LangGraph can inspect read-capable tools without receiving write access by default.

Firebase MCP Config for LangGraph

Headless CLI calls fit repeatable graph edges; MCP fits exploratory agent nodes.

{
  "mcpServers": {
    "kosmokrator-firebase": {
      "type": "stdio",
      "command": "kosmo",
      "args": [
        "mcp:serve",
        "--integration=firebase",
        "--write=deny"
      ]
    }
  }
}

Run the Gateway Manually

kosmokrator mcp:serve --integration=firebase --write=deny

Why Use KosmoKrator Here

Scoped tools

Expose only Firebase instead of a broad multi-service tool list.

Local credentials

Reuse credentials already configured for the KosmoKrator CLI and Lua runtime.

Write policy

Start read-only, then opt into ask or allow for trusted workspaces.

Firebase Tools Visible to LangGraph

LangGraph sees stable MCP tool names generated from the Firebase integration catalog.

MCP toolSource functionTypeDescription
integration__firebase__firebase_list_projects firebase.firebase_list_projects Read List all Firebase projects the caller has access to. Returns project display names and IDs.
integration__firebase__firebase_get_project firebase.firebase_get_project Read Get details of a specific Firebase project by its resource name.
integration__firebase__firebase_list_databases firebase.firebase_list_databases Read List Cloud Firestore databases in a Firebase project.
integration__firebase__firebase_list_documents firebase.firebase_list_documents Read List documents in a Firestore collection.
integration__firebase__firebase_list_collections firebase.firebase_list_collections Read List collection IDs under a Firestore document or database root.
integration__firebase__firebase_list_users firebase.firebase_list_users Read List users in a Firebase project via the Identity Toolkit API.
integration__firebase__firebase_get_current_user firebase.firebase_get_current_user Read Get the currently authenticated OAuth2 user profile information.

Related Firebase Pages

Firebase CLIUse direct JSON commands instead of MCP discovery. Firebase MCPFull gateway reference and MCP tool names. KosmoKrator for LangGraphClient-level gateway setup.