A free debate partner for your AI: real cut cards, never made-up evidence.
pf-debate is a free, open-source MCP server for Public Forum debate. Every card it hands you is checked word-for-word against its source before you ever see it — if a sentence can't be matched verbatim in the original text, it doesn't ship as a card.
Any age, no account: the web app searches 173,000 cut cards in plain English, finds new sources, and cuts verified cards right in your browser. Prefer your own AI? The connector link below adds the same tools to Claude (18+) or paid ChatGPT.
Connector link — paste this into your AI's connector settings
Connect it in three steps
Pick your app. Every option starts with the connector link above.
- In claude.ai, the desktop app, or the mobile app, go to Settings → Connectors.
- Choose Add custom connector.
- Paste the connector link from above and save.
Claude's terms require users to be 18+. Free plans allow 1 custom connector.
- Download pf-debate.mcpb.
- Double-click the file, then click Install.
- Say "Build the quick card library" to start your offline card library.
Claude's terms require users to be 18+. Free plans allow 1 custom connector.
- Go to Settings → Apps & Connectors → Advanced.
- Turn on Developer mode.
- Add the MCP server using the connector link from above.
Requires a paid plan with Developer Mode; may not be available on teen accounts.
- In the Gemini app, create a Gem.
- Paste instructions.md into the Gem's instructions.
- Add pf-debate-guide.md as knowledge.
Knowledge only: Gemini can't use the live tools, so check each card against its link.
Works the same way for a ChatGPT GPT or Project, or a Claude Project.
- Download instructions.md and pf-debate-guide.md.
- Upload both as knowledge files to your GPT, Project, or Gem.
- Ask it debate questions the same way you would with the live connector.
Cards inside the knowledge pack aren't automatically verified word-for-word — the live server does that checking for you.
Try asking
Once it's connected, talk to it like a teammate on your case doc.
- Make me a neg case on this month's PF topic centered around a nuclear impact
- Cut me a card that data centers raise electricity bills
- Analyze this card and give me CX questions
- They dropped our link turn. Write my summary.