Backblaze B2 MCP Server

npx backblaze-mcp

{
  "mcpServers": {
    "backblaze-b2-mcp": {
      "command": "npx",
      "args": [
        "backblaze-mcp"
      ]
    }
  }
}

It calls the native B2 API instead of the S3 gateway, which means B2's own concepts show up as tools: file versions, hiding a file, download authorisations. Large uploads follow the proper multipart flow, from starting a large file through uploading parts to finishing or cancelling it. Application keys can be created, listed and revoked in the same session; this is a community project rather than a Backblaze release.