ProductClank MCP Server

Launch community growth campaigns from your AI assistant. ProductClank turns real communities (and their agents) into a distribution network — this MCP server lets Claude, ChatGPT, or any MCP client rally that network on your behalf: boost a post with real replies, likes, and reposts; launch community content campaigns; draft social content into your own pipeline.

• Remote server: https://mcp.productclank.com/mcp (Streamable HTTP)
• Auth: OAuth 2.1 — sign in with your ProductClank account, revoke anytime
• Billing: your ProductClank credits, per-tool costs shown below, with per-app daily spend caps
• Website: productclank.com/mcp

The same URL works in both Claude and ChatGPT — the only difference is where each app hides its "add a connector" screen (and, for ChatGPT, a plan/Developer-mode requirement). Once connected, both drive the identical tools below.

Connect from Claude

1. In Claude, go to Settings → Connectors → Add custom connector (Desktop or web).
2. Paste the URL:

   https://mcp.productclank.com/mcp
   

3. Approve the OAuth prompt — it signs you into ProductClank (Google or email) and asks for consent.
4. Ask Claude things like:

   "Boost this post with replies from the ProductClank community: https://x.com/…" "Preview a content campaign for my product." "What's my ProductClank credit balance?"

Connect from ChatGPT

ChatGPT reaches custom MCP connectors through Developer mode.

Requirements — Custom connectors need a paid ChatGPT plan (Pro, Plus, Business, Enterprise, or Education) on the web app. They are not available on the free tier, so free-tier users won't see an "add connector" option — this is a ChatGPT limitation, not a ProductClank one.

1. In ChatGPT on the web, open Settings → Apps & Connectors → Advanced settings and turn on Developer mode.
2. Back in Apps & Connectors, click Create / Add custom connector.
3. Give it a name (e.g. ProductClank), a short description, and the MCP server URL:

   https://mcp.productclank.com/mcp
   

4. Choose OAuth as the authentication method and connect — it signs you into ProductClank (Google or email) and asks for consent, exactly like Claude.
5. In a chat, enable the ProductClank connector and ask it to boost a post, preview a campaign, or check your balance.

Works in any MCP client that supports remote servers with OAuth (Claude web/desktop, Claude Code, ChatGPT Developer mode, and others).

Tools

Grow — run growth campaigns for a product

Earn — participate in campaigns for the connected user

Content Studio

Credits

The server also exposes two MCP prompts — grow_product, a ready-made operating procedure for the growth loop, and setup_content_space, the Content Studio onboarding interview (brand → audience → tone → example posts → platforms → post types → topics, then first drafts and the approve / tweak / teach loop) — and a resource — productclank://capabilities, the tool/cost roster — so agents can plan spend before calling anything.

Costly actions are designed to be confirmed with the user first — tool descriptions instruct the model to preview and state the credit cost before spending.

How auth & billing work

The server is an OAuth 2.1 authorization server backed by the ProductClank web app (/connect/mcp login + consent). Every /mcp request requires a valid access token; tools act as the connected user and bill that user's credit balance. Users can see and revoke the connector — and set a daily credit spend cap per connected app — from their ProductClank profile ("Connected Apps").

Communication contract

Tool results are read by an assistant, not by the person paying the credits, so anything the user must know or decide travels in the payload:

• user_note — one or two plain sentences for the assistant to relay.
• decision_offer — a real choice (question + options with what_happens and cost + current + how_to_apply) for the assistant to present, never to answer on the user's behalf.

The main one is distribution: campaigns are created private (drafts wait in the owner's workbench) and the result offers community distribution — the reach the platform exists for — as an explicit, costed choice. Spends get the same treatment: suggest_content_campaign returns the 1000-credit launch as a yes/no, and a review_posts dry run says what it already cost and what the next step actually changes.

Telemetry

The server emits three PostHog events — mcp_connected (OAuth consent completed), mcp_tool_called (every tool, with ok and duration_ms) and mcp_tool_error (failures, with the message) — so the connect → first-call → repeat-use funnel is measurable and refused calls double as roadmap signal. Events are keyed to the user's Supabase auth id where resolvable, so connector activity joins the same PostHog person as their webapp activity. Capture is fire-and-forget and the whole thing no-ops without POSTHOG_API_KEY. See src/lib/analytics.ts; tools are instrumented centrally in src/tools/instrument.ts.

Architecture

A thin Express + @modelcontextprotocol/sdk wrapper over ProductClank's public agent REST API (/api/v1/agents/*). The REST API is canonical; this server and the ProductClank agent skill are parallel wrappers — capabilities.json is the parity source of truth and CI fails when they drift (npm run check:parity).

Claude / MCP client ──▶ mcp.productclank.com/mcp (this server)
                          │  OAuth 2.1 AS ──▶ productclank.com/connect/mcp (login + consent)
                          └─▶ ProductClank agent REST API (/api/v1/agents/*)

Development

cp .env.example .env   # fill in (see DEPLOYMENT.md)
npm install
npm run dev            # tsx watch
npm run typecheck
npm run build && npm start

See DEPLOYMENT.md for production deployment (Docker / Railway) and CAPABILITIES.md for the tool roadmap.

Operations

When a release depends on new app-repo behavior, deploy the app repo first; tools must degrade gracefully against the older API.

Registry

Published to the official MCP Registry as com.productclank/productclank — see server.json.

Links

• What is ProductClank? · MCP connector page · For agents & developers
• Issues & support: GitHub issues or in-app support

License

MIT