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SpeedCurve MCP Integration for LangGraph

Connect SpeedCurve to LangGraph through the local KosmoKrator MCP gateway with scoped tools, credentials, and write policy.

7 functions 6 read 1 write API key auth
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Connect SpeedCurve to LangGraph

Run KosmoKrator integration calls from LangGraph nodes while preserving local credentials and permissions.

Use a graph node that calls the KosmoKrator CLI for deterministic steps or an MCP client for dynamic tool selection. The gateway is local, scoped to this integration, and starts with --write=deny so LangGraph can inspect read-capable tools without receiving write access by default.

SpeedCurve MCP Config for LangGraph

Headless CLI calls fit repeatable graph edges; MCP fits exploratory agent nodes.

{
  "mcpServers": {
    "kosmokrator-speedcurve": {
      "type": "stdio",
      "command": "kosmo",
      "args": [
        "mcp:serve",
        "--integration=speedcurve",
        "--write=deny"
      ]
    }
  }
}

Run the Gateway Manually

kosmokrator mcp:serve --integration=speedcurve --write=deny

Why Use KosmoKrator Here

Scoped tools

Expose only SpeedCurve instead of a broad multi-service tool list.

Local credentials

Reuse credentials already configured for the KosmoKrator CLI and Lua runtime.

Write policy

Start read-only, then opt into ask or allow for trusted workspaces.

SpeedCurve Tools Visible to LangGraph

LangGraph sees stable MCP tool names generated from the SpeedCurve integration catalog.

MCP toolSource functionTypeDescription
integration__speedcurve__speedcurve_list_sites speedcurve.speedcurve_list_sites Read List all monitored sites in SpeedCurve. Returns site IDs, names, and URLs that you can use to query test results.
integration__speedcurve__speedcurve_get_site speedcurve.speedcurve_get_site Read Get detailed information about a specific SpeedCurve site, including its URLs, test settings, and latest test results.
integration__speedcurve__speedcurve_list_tests speedcurve.speedcurve_list_tests Read List recent synthetic test results from SpeedCurve. Optionally filter by site, browser, or region.
integration__speedcurve__speedcurve_get_test speedcurve.speedcurve_get_test Read Get detailed results for a specific SpeedCurve synthetic test run, including Core Web Vitals, filmstrip data, and waterfall metrics.
integration__speedcurve__speedcurve_list_deployments speedcurve.speedcurve_list_deployments Read List recent deployments in SpeedCurve and their performance impact. Shows how each deploy affected Core Web Vitals and load times.
integration__speedcurve__speedcurve_create_deployment speedcurve.speedcurve_create_deployment Write Register a new deployment in SpeedCurve to trigger synthetic performance tests. Use this when deploying code changes to track their performance impact.
integration__speedcurve__speedcurve_get_current_user speedcurve.speedcurve_get_current_user Read Get details about the currently authenticated SpeedCurve user. Useful for verifying API credentials and checking account information.

Related SpeedCurve Pages

SpeedCurve CLIUse direct JSON commands instead of MCP discovery. SpeedCurve MCPFull gateway reference and MCP tool names. KosmoKrator for LangGraphClient-level gateway setup.