Backblaze B2 MCP Server

by backblaze-labsio.github.backblaze-labs/b2-mcpv0.2.2

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

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Active3d ago

Install Backblaze B2 MCP server

claude mcp add b2 -e B2_APPLICATION_KEY_ID='<b2-application-key-id>' -e B2_APPLICATION_KEY='<b2-application-key>' -e B2_MASTER_KEY_ID='<b2-master-key-id>' -e B2_MASTER_KEY='<b2-master-key>' -- npx -y @backblaze-labs/b2-mcp

{
  "mcpServers": {
    "b2": {
      "command": "npx",
      "args": [
        "-y",
        "@backblaze-labs/b2-mcp"
      ],
      "env": {
        "B2_APPLICATION_KEY_ID": "<b2-application-key-id>",
        "B2_APPLICATION_KEY": "<b2-application-key>",
        "B2_MASTER_KEY_ID": "<b2-master-key-id>",
        "B2_MASTER_KEY": "<b2-master-key>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "b2": {
      "command": "npx",
      "args": [
        "-y",
        "@backblaze-labs/b2-mcp"
      ],
      "env": {
        "B2_APPLICATION_KEY_ID": "<b2-application-key-id>",
        "B2_APPLICATION_KEY": "<b2-application-key>",
        "B2_MASTER_KEY_ID": "<b2-master-key-id>",
        "B2_MASTER_KEY": "<b2-master-key>"
      }
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "b2": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@backblaze-labs/b2-mcp"
      ],
      "env": {
        "B2_APPLICATION_KEY_ID": "<b2-application-key-id>",
        "B2_APPLICATION_KEY": "<b2-application-key>",
        "B2_MASTER_KEY_ID": "<b2-master-key-id>",
        "B2_MASTER_KEY": "<b2-master-key>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "b2": {
      "command": "npx",
      "args": [
        "-y",
        "@backblaze-labs/b2-mcp"
      ],
      "env": {
        "B2_APPLICATION_KEY_ID": "<b2-application-key-id>",
        "B2_APPLICATION_KEY": "<b2-application-key>",
        "B2_MASTER_KEY_ID": "<b2-master-key-id>",
        "B2_MASTER_KEY": "<b2-master-key>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
B2_APPLICATION_KEY_ID	yes	yes	Backblaze B2 application key ID for native B2 and S3-compatible tools.
B2_APPLICATION_KEY	yes	yes	Backblaze B2 application key secret.
B2_REGION	—	—	Optional fallback S3-compatible region used before authorization.
B2_MASTER_KEY_ID	—	yes	Optional master key ID for Partner/Groups API tools.
B2_MASTER_KEY	—	yes	Optional master key secret for Partner/Groups API tools.

Freshness

Active — last maintenance signal 3d ago. The newest of the signals below sets the band.

Last commit (default branch)
2026-10-07 · 3d ago · GitHub
Latest release
2026-09-29 · 11d ago · GitHub · v0.2.2
Package published
no data · npm/PyPI
Registry entry updated
2026-09-29 · 11d ago · official registry · v0.2.2

FAQ

›How do I install the Backblaze B2 MCP server in Claude Code?

Run: claude mcp add b2 -e B2_APPLICATION_KEY_ID='<b2-application-key-id>' -e B2_APPLICATION_KEY='<b2-application-key>' -e B2_MASTER_KEY_ID='<b2-master-key-id>' -e B2_MASTER_KEY='<b2-master-key>' -- npx -y @backblaze-labs/b2-mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does Backblaze B2 require an API key?

Yes. It expects B2_APPLICATION_KEY_ID, B2_APPLICATION_KEY, B2_MASTER_KEY_ID, B2_MASTER_KEY, of which 4 are secrets.

›Can I use Backblaze B2 as a remote (hosted) MCP server?

No hosted endpoint is published; it runs locally over stdio.

›Is Backblaze B2 in the official MCP registry?

Yes, as io.github.backblaze-labs/b2-mcp.