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Heroku MCP Integration for LangGraph

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

7 functions 7 read 0 write API key auth
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Connect Heroku 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.

Heroku MCP Config for LangGraph

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

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

Run the Gateway Manually

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

Why Use KosmoKrator Here

Scoped tools

Expose only Heroku 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.

Heroku Tools Visible to LangGraph

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

MCP toolSource functionTypeDescription
integration__heroku__heroku_list_apps heroku.heroku_list_apps Read List all Heroku apps the authenticated user has access to. Returns app names, IDs, regions, and status.
integration__heroku__heroku_get_app heroku.heroku_get_app Read Get details for a specific Heroku app by ID or name. Returns full app information including region, stack, and Git URL.
integration__heroku__heroku_list_dynos heroku.heroku_list_dynos Read List all dynos for a given Heroku app. Returns dyno names, types, sizes, states, and uptime.
integration__heroku__heroku_list_addons heroku.heroku_list_addons Read List all add-ons attached to a given Heroku app. Returns add-on names, plans, states, and provider details.
integration__heroku__heroku_list_domains heroku.heroku_list_domains Read List all domains for a given Heroku app. Returns domain hostnames, types (custom/Heroku), and status.
integration__heroku__heroku_list_collaborators heroku.heroku_list_collaborators Read List all collaborators for a given Heroku app. Returns collaborator emails, roles, and permissions.
integration__heroku__heroku_get_current_user heroku.heroku_get_current_user Read Get information about the current authenticated Heroku account, including email, name, and verified status.

Related Heroku Pages

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