Backblaze B2 MCP Server

local MCP server

Installation

Terminal

claude mcp add b2-mcp -e B2_APPLICATION_KEY_ID=... -e B2_APPLICATION_KEY=... -e B2_REGION=... -e B2_MASTER_KEY_ID=... -e B2_MASTER_KEY=... -- npx -y @backblaze-labs/b2-mcp

Run in your project folder. Add --scope user to use it everywhere.

Claude Desktop, Cursor & other clients

Add to claude_desktop_config.json or .cursor/mcp.json.

{
  "mcpServers": {
    "b2-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@backblaze-labs/b2-mcp"
      ],
      "env": {
        "B2_APPLICATION_KEY_ID": "...",
        "B2_APPLICATION_KEY": "...",
        "B2_REGION": "...",
        "B2_MASTER_KEY_ID": "...",
        "B2_MASTER_KEY": "..."
      }
    }
  }
}

Fill in the environment variables with your own credentials.

Summary

Official Backblaze B2 MCP server for buckets, files, keys, Object Lock, and S3 storage.

Questions

Backblaze B2 MCP Server is a local MCP server distributed as the npm package @backblaze-labs/b2-mcp.

Run: claude mcp add b2-mcp -e B2_APPLICATION_KEY_ID=... -e B2_APPLICATION_KEY=... -e B2_REGION=... -e B2_MASTER_KEY_ID=... -e B2_MASTER_KEY=... -- npx -y @backblaze-labs/b2-mcp

Run: codex mcp add b2-mcp --env B2_APPLICATION_KEY_ID=... --env B2_APPLICATION_KEY=... --env B2_REGION=... --env B2_MASTER_KEY_ID=... --env B2_MASTER_KEY=... -- npx -y @backblaze-labs/b2-mcp

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