Worldku MCP Server

worldku-mcp

The official MCP server for Worldku memory. Save AI conversations into your Worldku memory and recall them back — from Claude Code, claude.ai, ChatGPT, Codex, Gemini CLI, or any other MCP client.

Full setup guide: worldku.com/docs/mcp — step-by-step instructions for every client, authentication details, and troubleshooting. The same page in raw Markdown for AI agents: worldku.com/docs/mcp.md.

The fastest way to set up: paste this into your AI tool and let it walk you through —

I want to give you long-term memory with Worldku. Read https://www.worldku.com/docs/mcp.md and walk me through connecting it, in your own words.

Hosted service. The public endpoint is https://mcp.worldku.com/mcp. This repository is the open access layer only: the memory extraction pipeline, prompt rules, and platform services run on Worldku's infrastructure. Self-hosting this worker will not give you a working service — it exists for transparency and review, and connects to backends that require Worldku credentials.

Tools

All tools fire only on your explicit ask — the tool descriptions instruct the model never to call them from ambient association. Saved transcripts go through Worldku's normal import pipeline: extraction runs asynchronously and new memories land in your memory workbench marked unread. Re-saving the same conversation is deduplicated server-side; extending a previously saved conversation appends only the new tail.

Connecting

Two authentication routes:

• OAuth 2.1 — claude.ai and ChatGPT need no key at all: point them at the server URL and sign in at worldku.com when prompted.
• Access key — CLI clients use a wk_mcp_… key, minted at worldku.com → Memory manager → AI tools. The key is shown once at mint time; up to 20 keys per account, each independently revocable.

Claude Code

claude mcp add --transport http --scope user worldku https://mcp.worldku.com/mcp \
  --header "Authorization: Bearer wk_mcp_YOUR_KEY"

To keep the key out of the config file, export WORLDKU_MCP_KEY in your shell profile and use single quotes: --header 'Authorization: Bearer ${WORLDKU_MCP_KEY}'.

claude.ai (web, desktop, mobile)

Settings → Connectors → Add → Add custom connector → https://mcp.worldku.com/mcp → sign in at worldku.com. No key needed.

ChatGPT (web)

Enable Developer mode (Settings → Security and login), then create an app at chatgpt.com/plugins with the server URL and OAuth authentication. Sign in at worldku.com when prompted.

Codex CLI

export WORLDKU_MCP_KEY=wk_mcp_YOUR_KEY
codex mcp add worldku --url https://mcp.worldku.com/mcp --bearer-token-env-var WORLDKU_MCP_KEY

Gemini CLI

// ~/.gemini/settings.json — note the httpUrl field name
{
  "mcpServers": {
    "worldku": {
      "httpUrl": "https://mcp.worldku.com/mcp",
      "headers": { "Authorization": "Bearer wk_mcp_YOUR_KEY" }
    }
  }
}

Any other MCP client

Any client that supports Streamable HTTP with a custom header works:

• URL: https://mcp.worldku.com/mcp
• Header: Authorization: Bearer wk_mcp_YOUR_KEY

The config field holding the URL varies by client (url for most, httpUrl for Gemini CLI, serverUrl for some others) — a wrong field name usually makes the client ignore the server silently. More examples in examples/ and in the full guide.

Protocol

• Native MCP revision 2026-07-28 (stateless Streamable HTTP): per-request metadata, no sessions, no SSE streams — every response is a single JSON object.
• Dual-era: the 2025-11-25 initialize-handshake era is also served (still statelessly — no session ids, no SSE), because that is what current-generation clients speak. This leg will be dropped once the client ecosystem moves to 2026-07-28.
• server/discover, tools/list, tools/call, and the Tasks extension (tasks/get / tasks/update / tasks/cancel) for async save polling. Clients that do not declare the extension get synchronous receipts instead.
• OAuth 2.1 resource server per the MCP authorization spec: RFC 9728 protected resource metadata at /.well-known/oauth-protected-resource, audience-bound opaque tokens, memory:read / memory:write scopes. The authorization server (worldku.com) supports Client ID Metadata Documents and PKCE S256.
• Discovery (SEP-2127 experimental): Server Card at /mcp/server-card, AI Catalog at /.well-known/ai-catalog.json.

Limits

• 200 reads and 50 saves per user per day (anti-abuse caps, reset at 00:00 UTC).
• 10 MB per request.
• Reads and saves each book one usage action on your Worldku account. MCP access is included with every Worldku plan, including Free.

Development

pnpm install
pnpm test        # vitest
pnpm type-check
pnpm lint

Deployment (Cloudflare Workers) is done by the Worldku team — see wrangler.toml for the binding surface (no secrets live in this repo).

License

MIT