How to Use the Fastn MCP in Cursor

Q: How do I configure the Fastn MCP Server in my Cursor project?

Create a .cursor/mcp.json file in your project root and add the server configuration under the mcpServers key. Once saved, Cursor's agent mode will immediately gain access to all sixteen automation tools exposed by the MCP Server.

Q: How does the Fastn integration with Cursor handle rate limits?

The Cursor MCP client can proactively call getquotausage to inspect your active limits. This ensures you do not trigger rate limiting errors while running rapid tests from your editor.

Q: Can I manage my connector credentials inside Cursor?

Yes, you can use the storecredentials and rotatecredentials tools through the Cursor chat. This keeps your integration secrets up to date without exposing them in your local codebase.

Write code that triggers, manages, and monitors your Fastn automation flows directly from Cursor.

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Create your Vinkius account to connect Fastn 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 Fastn with Cursor

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Generate code using real Fastn schemas in Cursor

Writing integration code in Cursor becomes much faster when your editor uses `get_workflow` to pull the precise JSON schema of any active flow directly into your workspace. This means the code your editor generates matches your live API payloads perfectly. Writing integration code in Cursor becomes much faster when your editor knows exactly what your backend workflows expect through this MCP integration. You no longer have to guess which parameters your automation steps require. By calling `list_workflows` to map out your tenant's active flows, Cursor builds working integration logic based on real-time definitions instead of outdated documentation or mock schemas.

Debug live executions directly inside Cursor

Testing your local code against live workflows is easy when this MCP Server lets Cursor trigger `execute_flow` with your active code's output. You can trace the execution path without leaving your editor. When things go wrong, your agent calls `get_execution` to pinpoint the exact step that failed. If a test run gets stuck in an infinite loop, you can quickly invoke `cancel_execution` from the Cursor chat to free up your system resources.

Track your API quotas and limits as you write code

Tracking your API quotas and limits as you write code is possible because Cursor can monitor your usage in real-time by calling `get_quota_usage`. This helps you optimize your loops before deploying them. You can also request a high-level overview using `get_quota_summary` to see which flows consume the most resources. Having this data inside your editor allows you to write more efficient automation logic and manage costs before they spike.

Setup guide

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

.cursor/mcp.json

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

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Common questions about Fastn MCP in Cursor

Create a `.cursor/mcp.json` file in your project root and add the server configuration under the `mcpServers` key. Once saved, Cursor's agent mode will immediately gain access to all sixteen automation tools exposed by the MCP Server.

Yes, you can describe the automation logic you need in the Cursor chat. Your agent will write the configuration and call `create_workflow` to build the flow on your tenant.

The Cursor MCP client can proactively call `get_quota_usage` to inspect your active limits. This ensures you do not trigger rate limiting errors while running rapid tests from your editor.

Yes, you can use the `store_credentials` and `rotate_credentials` tools through the Cursor chat. This keeps your integration secrets up to date without exposing them in your local codebase.

No, your workflow definitions and execution logs are only read when the agent explicitly calls tools like `get_workflow`. All communications are encrypted and run within Vinkius's secure sandbox environment.

Use it with your favorite AI tools

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

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