KosmoKrator

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PlanetScale MCP Integration for LangGraph

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

7 functions 6 read 1 write Bearer token auth
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Connect PlanetScale 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.

PlanetScale MCP Config for LangGraph

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

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

Run the Gateway Manually

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

Why Use KosmoKrator Here

Scoped tools

Expose only PlanetScale 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.

PlanetScale Tools Visible to LangGraph

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

MCP toolSource functionTypeDescription
integration__planetscale__planetscale_list_databases planetscale.planetscale_list_databases Read List databases in a PlanetScale organization. Returns a paginated list of databases with their names, regions, and states.
integration__planetscale__planetscale_get_database planetscale.planetscale_get_database Read Get details of a specific PlanetScale database, including its state, region, and branch count.
integration__planetscale__planetscale_create_database planetscale.planetscale_create_database Write Create a new database in a PlanetScale organization. Specify the database name and optionally a region and notes.
integration__planetscale__planetscale_list_branches planetscale.planetscale_list_branches Read List branches of a PlanetScale database. Returns a paginated list of branches with their names, roles, and states.
integration__planetscale__planetscale_get_branch planetscale.planetscale_get_branch Read Get details of a specific branch of a PlanetScale database, including its role, region, and readiness.
integration__planetscale__planetscale_list_organizations planetscale.planetscale_list_organizations Read List organizations the authenticated user belongs to. Useful for discovering organization names needed by other PlanetScale tools.
integration__planetscale__planetscale_get_current_user planetscale.planetscale_get_current_user Read Get the profile of the currently authenticated PlanetScale user. Useful for verifying API credentials and retrieving account information.

Related PlanetScale Pages

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