How to Use the Codecov MCP in Windsurf

Q: How does Windsurf Cascade use Codecov to find untested code?

Cascade calls getcoveragereporttree to fetch the file structure and coverage percentages. It then matches this structure with your local workspace files to identify the exact lines of code that need new test cases.

Q: Does Windsurf support Codecov flags for split test suites?

Yes, Cascade uses the listcoverageflags tool to filter coverage metrics by specific test suites. This helps you analyze frontend and backend coverage separately inside the IDE.

Cascade chains Codecov tools to track test coverage gaps and fix untested code blocks autonomously in Windsurf.

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Connect Codecov MCP to Windsurf

Create your Vinkius account to connect Codecov to Windsurf 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 Codecov with Windsurf

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Spot coverage drops inside Windsurf Cascade runs

Cascade reads your local workspace, finds edited files, and immediately runs `get_commit_coverage_totals` to check if your latest changes dragged down the repo score. It doesn't ask you for permission; it just pulls the delta from Codecov and decides if it needs to write more tests. If the numbers look bad, Cascade uses `get_coverage_report_tree` to map out the exact files that lack test coverage. You get a clean visual of the missing lines directly in your IDE sidebar, letting you fix the gaps before opening a pull request.

Let Cascade audit branches with the Codecov MCP Server

When you switch branches, this MCP Server lets Cascade automatically call `list_repository_branches` to check the health of target branches. It compares your local branch with upstream metrics without forcing you to open a browser tab. Cascade then queries `list_repository_commits` to see where the coverage trend started slipping. It reads the commit history, matches it with Codecov data, and flags the exact commit that introduced the untested logic.

Map repository health during active refactoring

During large-scale code updates, Windsurf uses `get_repository_coverage_details` to monitor how your refactoring affects the overall codebase. Cascade tracks the coverage percentage of every directory you touch in real time. By using `list_coverage_flags`, the agent separates unit test coverage from integration test coverage. It ensures your refactored code satisfies all coverage requirements before you mark the task as complete.

Setup guide

Set up Codecov MCP in Windsurf

Prerequisites

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

1

Open MCP configuration

Click the Cascade assistant icon in the sidebar, then click the hammer icon (🔨) at the top of the panel. Select "Configure" to open ~/.codeium/windsurf/mcp_config.json.
2

Add the Codecov MCP

Paste the JSON snippet shown on the right into the mcpServers object. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com.
3

Refresh MCPs

Go back to the hammer icon (🔨) in Cascade and click "Refresh". Windsurf will detect the new server. No full restart is needed — the connection is hot-reloaded.
4

Verify in Cascade

Start a new Cascade conversation and ask something like "Show my Codecov payment history." If connected, Cascade will call the Codecov tools directly. You will see a green dot next to the server name in the MCP panel.

mcp_config.json

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

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Common questions about Codecov MCP in Windsurf

Cascade calls `get_coverage_report_tree` to fetch the file structure and coverage percentages. It then matches this structure with your local workspace files to identify the exact lines of code that need new test cases.

Yes, you can add the server under the mcpServers key using the MCP configuration in your settings file. Once added, Cascade automatically detects the tools and starts using them during coding tasks.

Yes, Cascade uses the `list_coverage_flags` tool to filter coverage metrics by specific test suites. This helps you analyze frontend and backend coverage separately inside the IDE.

You can control Cascade's autonomy in your settings, but the `get_commit_coverage_totals` tool is optimized to only run when Cascade needs to verify a specific commit. It won't spam your API rate limits during standard editing.

No, this integration only handles metadata like commit SHAs, coverage percentages, and file paths. Your actual source code remains secure inside Windsurf and the Vinkius V8 Isolate sandbox.

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