How to Use the FastSpring MCP in Cursor

Q: Can Cursor run subscription cancellations?

Yes, the agent can invoke cancelsubscription directly if you instruct it to terminate a plan. It will query the API and return the confirmation details to your chat window. This makes it easy to test churn triggers while writing code.

Q: How do I verify catalog mappings inside Cursor?

Ask the agent to run listcatalogproducts to fetch your active product list. It will display the exact product IDs and pricing structures. You can then have the agent write configuration files using this real data.

Generate code and debug billing flows using live FastSpring transaction data in Cursor.

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Connect FastSpring MCP to Cursor

Create your Vinkius account to connect FastSpring 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 FastSpring with Cursor

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Build integrations using real FastSpring MCP Server data

Writing mock billing code is a waste of time. This MCP Server lets Cursor pull live pricing arrays directly into your active files using `list_catalog_products`. Your agent writes working code against real SKUs instead of guessing the API structure. When testing your checkout flows, use `get_subscription_details` to verify that your code handles plan math correctly. The editor receives actual server payloads to ensure your logic is production-ready.

Manage active buyer accounts from your editor

Debugging account state issues is faster when you add this MCP server to your workspace. Cursor calls `list_accounts` to grab customer records, letting you inspect the exact properties driving your application logic. You can diagnose database mismatches without leaving your workspace. To modify user profiles during testing, trigger `update_account_info` directly from the chat pane. This sends a JSON payload to update customer data, which you can verify immediately with `get_account_details`.

Test billing mutations safely in Cursor

Running state changes during development requires precise tools. The `charge_managed_subscription` tool lets your agent pull active billing rules to check how recurring charges behave. This guarantees your code handles renewals without breaking. If you need to simulate churn workflows, execute `cancel_subscription` to end active plans during testing. You can also generate login tokens using `generate_auth_link` to verify your customer portal redirects.

Setup guide

Set up FastSpring 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 FastSpring 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 FastSpring transactions." If the MCP tools are loaded correctly, Cursor will call the FastSpring tools automatically. You can also check Settings → MCP for a green status indicator.

.cursor/mcp.json

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

Get your connection token →

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Common questions about FastSpring MCP in Cursor

Add the MCP server configuration to your project-level settings file inside the `.cursor` folder. Once saved, enable agent mode in your chat window to let the editor access the billing tools. This configuration can also be set globally in your home directory.

Yes, the agent can invoke `cancel_subscription` directly if you instruct it to terminate a plan. It will query the API and return the confirmation details to your chat window. This makes it easy to test churn triggers while writing code.

Ask the agent to run `list_catalog_products` to fetch your active product list. It will display the exact product IDs and pricing structures. You can then have the agent write configuration files using this real data.

The editor will display a connection error in the chat interface. You can configure retry logic or check your network settings if the tools fail to reach the API gateway.

Your API credentials, customer records, and checkout logs are processed within a zero-trust sandbox. Vinkius handles the endpoint authentication securely without exposing your secrets to the editor. No customer database records are stored on our servers.

Use it with your favorite AI tools

Connect this server to Cursor, Claude, VS Code, and more.

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