How to Use the Fastn MCP in Cline

Q: How does Cline verify that a Fastn flow is running correctly?

Cline calls executeflow with a test payload and monitors the run. It then uses getexecution to inspect each step's output and confirm the integration is working.

Q: Can Cline update existing Fastn workflows?

Yes. Cline uses getworkflow to fetch the current definition, modifies the JSON structure based on your instructions, and applies the changes using updateworkflow.

Q: How do I monitor my daily Fastn usage inside Cline?

Ask Cline for your current usage. It calls getquotausage and getquotadaily to display your exact consumption metrics directly in the VS Code sidebar.

Q: Can I cancel a stuck workflow run?

Yes. Tell Cline to stop the execution. It runs listexecutions to find the active run and calls cancelexecution to terminate it immediately.

Build, test, and run your Fastn workflows autonomously inside VS Code with Cline.

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Create your Vinkius account to connect Fastn to Cline 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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End-to-end flow generation with Cline

The `create_workflow` tool lets Cline draft and register complete automation definitions directly inside your Fastn tenant using this MCP integration. Cline reads your local codebase context, designs the steps, and pushes the configuration without requiring manual API calls. After creating the flow, Cline uses `publish_workflow` to deploy it. It handles the complete setup loop, checking for errors and fixing configuration bugs on the fly until the flow runs cleanly.

Run tests and monitor traces using this MCP Server

The `execute_flow` tool runs your live automation directly from the Cline interface to verify your setup. Cline passes test payloads to the flow, captures the response, and verifies that the output matches your expectations. If the test fails, Cline calls `get_execution` to pull the complete trace. It walks through every step of the execution, finds the broken node, and uses `update_workflow` to apply the fix.

Secure credential rotation with Cline

The `store_credentials` tool lets Cline configure API keys for your external integrations. Cline sets up the connection details directly in your Fastn vault, keeping your local workspace free of raw secrets. When credentials expire, Cline runs `rotate_credentials` to update the tokens. It ensures your automation pipelines never break due to expired access keys by managing the lifecycle of your integration secrets through the MCP Server.

Setup guide

Set up Fastn MCP in Cline

Prerequisites

VS Code with Cline extension installed
Active Vinkius subscription with a valid endpoint token

1

Open Cline MCP settings

Click the Cline icon in the VS Code sidebar to open the Cline panel. Then click the MCP Servers icon (server stack) at the top-right corner of the panel.
2

Add a remote server

Click "Remote Servers" at the top, then click "Add Remote MCP". In the Name field, type fastn-mcp. In the URL field, paste your Vinkius endpoint: https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp. Get your token from cloud.vinkius.com.
3

Enable the server

After saving, the server appears in the Cline MCP panel. Toggle the switch to enable it. The status indicator turns green when the connection is live.
4

Start using tools

Return to the Cline chat and ask: "Check my latest Fastn refund status." Cline will discover the available tools and request your approval before invoking each one — giving you full control over every action.

Cline MCP Settings

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

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Common questions about Fastn MCP in Cline

Cline calls `execute_flow` with a test payload and monitors the run. It then uses `get_execution` to inspect each step's output and confirm the integration is working.

Yes. Cline uses `get_workflow` to fetch the current definition, modifies the JSON structure based on your instructions, and applies the changes using `update_workflow`.

Ask Cline for your current usage. It calls `get_quota_usage` and `get_quota_daily` to display your exact consumption metrics directly in the VS Code sidebar.

Yes. Tell Cline to stop the execution. It runs `list_executions` to find the active run and calls `cancel_execution` to terminate it immediately.

Your workflow definitions and API secrets are stored on Fastn's infrastructure, accessed via `get_credentials`. Cline only acts as an MCP client, querying the MCP endpoint over a secure local channel without external logging.

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