How to Use the Backblaze B2 MCP in Cursor

Q: Can I manage file versions in Backblaze B2 directly from Cursor?

Yes. You can instruct your agent to use tools like deletefileversion to remove a specific object version or hidefile to perform a soft delete.

Q: What happens if I try to delete a non-empty bucket with Cursor?

The deletebucket tool will fail with an error, just like the real B2 API. Your agent will see the error and report it back to you. You have to empty the bucket first.

Inject live Backblaze B2 data directly into your code. Let your Cursor agent build functions using real bucket names and file IDs.

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Connect Backblaze B2 MCP to Cursor

Create your Vinkius account to connect Backblaze B2 to Cursor and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup Backblaze B2 with Cursor

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Stop mocking B2 data in your code

Your Cursor agent can use `list_buckets` to get real bucket IDs from your Backblaze account. Then it can use `list_file_names` to fetch a list of actual files. The agent injects these real strings directly into the code it's writing for you. This means the functions and scripts your agent generates are ready to run. No more filling in placeholder `BUCKET_ID` variables or fake file paths. You get working code that interacts with your actual B2 storage from the first draft.

Provision and configure B2 from Cursor

Need a new bucket for a feature branch? Tell your agent. It uses the `create_bucket` tool to make one. You can also have it change access rules with `update_bucket` when you need to make a bucket's assets public. When you're done, you can clean up. The agent uses `delete_file_version` to get rid of old object versions or `delete_bucket` to remove an entire bucket once it's empty. You can manage your B2 infrastructure without leaving your editor.

Debug B2 uploads with your MCP Server

If your app's uploads to B2 are failing, it's hard to debug. Your Cursor agent can use `list_unfinished_large_files` to find any multipart uploads that never finished. It gives you the exact file IDs so you know what failed. You can also get granular details with `get_file_info`. Ask the agent to pull the checksum and headers for a specific file to see if it matches what you intended to upload. This MCP tool makes debugging B2 issues much faster.

Setup guide

Set up Backblaze B2 MCP in Cursor

Prerequisites

Cursor installed (macOS, Windows, or Linux)
Active Vinkius subscription with a valid endpoint token

1

Open MCP Settings

Go to Cursor Settings → MCP or open the Command Palette (Cmd+Shift+P / Ctrl+Shift+P) and search for "MCP: Add Server".
2

Add the Backblaze B2 MCP

Cursor will create or open .cursor/mcp.json in your project root. Paste the JSON snippet on the right. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com.
3

Enable Agent mode

Open Composer (Cmd+I / Ctrl+I) and switch to Agent mode using the dropdown at the top. MCP tools are only available in Agent mode.
4

Verify the connection

Ask Cursor something like "List my recent Backblaze B2 transactions." If the MCP tools are loaded correctly, Cursor will call the Backblaze B2 tools automatically. You can also check Settings → MCP for a green status indicator.

.cursor/mcp.json

{
  "mcpServers": {
    "backblaze-b2-mcp": {
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

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Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Backblaze B2. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

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Common questions about Backblaze B2 MCP in Cursor

By using this MCP Server. Once configured, your Cursor agent can call tools like `list_buckets` to fetch live data from your B2 account and write it directly into your code.

Yes. You can instruct your agent to use tools like `delete_file_version` to remove a specific object version or `hide_file` to perform a soft delete.

The MCP Server, managed by Vinkius, handles the authentication. You connect Cursor to the server's endpoint, and it securely manages the API calls to your Backblaze B2 account.

The `delete_bucket` tool will fail with an error, just like the real B2 API. Your agent will see the error and report it back to you. You have to empty the bucket first.

It only interacts with metadata: bucket names, file names, version IDs, and access control settings. The server never processes the content of your files. Your B2 credentials are also stored securely by the Vinkius platform, not in your editor config.

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