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Hacker News MCP Integration for LangGraph

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

5 functions 5 read 0 write No credentials auth
Submit Hacker News feedback View package source

Connect Hacker News 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.

Hacker News MCP Config for LangGraph

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

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

Run the Gateway Manually

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

Why Use KosmoKrator Here

Scoped tools

Expose only Hacker News 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.

Hacker News Tools Visible to LangGraph

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

MCP toolSource functionTypeDescription
integration__hackernews__hackernews_get_item hackernews.hackernews_get_item Read Fetch a Hacker News item (story, comment, job, poll, or poll option) by its numeric ID. Returns all available fields: title, URL, text, author (by), score, time, descendants, and kids (child comment IDs). Use this to look up any HN item when you know its ID.
integration__hackernews__hackernews_get_user hackernews.hackernews_get_user Read Fetch a Hacker News user profile by username. Returns karma score, about text, account creation date, and lists of submitted item IDs (submissions) and comment IDs.
integration__hackernews__hackernews_list_top_stories hackernews.hackernews_list_top_stories Read Fetch the current top stories from Hacker News. Returns up to N stories with full item data (title, URL, score, author, comment count). The "top" list is ranked by the HN algorithm (a combination of score, recency, and flags).
integration__hackernews__hackernews_list_new_stories hackernews.hackernews_list_new_stories Read Fetch the newest stories from Hacker News. Returns up to N stories with full item data (title, URL, score, author, comment count). These are the most recently submitted stories, not yet ranked by the HN algorithm.
integration__hackernews__hackernews_list_best_stories hackernews.hackernews_list_best_stories Read Fetch the highest-scoring (best) stories from Hacker News. Returns up to N stories with full item data (title, URL, score, author, comment count). These are the stories with the highest scores, regardless of age.

Related Hacker News Pages

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