Octagon Cards for AI assistants

Ask about your UFC cards

Connect Octagon to your AI assistant to find a card, read its estimated value and check the sales behind your comparison.

Connect Octagon

No Octagon account or API key is needed. Add a remote MCP connector in your assistant using this address. MCP is the connection that lets the assistant request information from Octagon.

https://mcp.octagon.cards/mcp

Choose Streamable HTTP and no authentication if your assistant asks.

Add to ClaudeOpen ChatGPT plugins

In ChatGPT, use the custom MCP option if your account or workspace supports it, then enter the address above. These are custom connections. A public directory listing is not required to use the service. Your assistant's plan and workspace settings may limit custom connectors.

Try a question

  • "Find the 2025 Topps Chrome UFC Marina Rodriguez #145 Gold Refractor /50 and show its recorded sales."
  • "What is Octagon's estimate for this edition, and how old is the evidence?"
  • "Show comparable sales and explain which cards are different from mine."

Give the fighter, year, set, card number and parallel when you know them. The assistant may need to ask which version you have before it can interpret a price.

What the answers mean

Recorded sales show individual transactions in Octagon's records. Coverage is incomplete. Comparables may differ in parallel, release or fighter, and those differences matter. Each result links to the Octagon card page and includes sale sources when available.

Estimates pool raw and graded sales. They describe a catalogue edition, not the condition or grading company of your copy. A recorded numeric grade does not establish the grading company. Check the sale dates and the estimate's data cutoff. An unavailable estimate stays unavailable.

The connector cannot scan a photo or access your portfolio. Use the Octagon scanner to identify a photo first. The connector returns a limited selection of evidence for each card and does not offer bulk downloads.

Privacy and help

Your assistant sends the search words or card identifier needed for a lookup. Octagon returns public card information. The connector does not request your account, collection, photos or full conversation. We do not keep connector request bodies or search text in application logs. Cloudflare processes requests and limits traffic. Your assistant provider handles the conversation under its own policy.

Read our privacy policy and terms. If a match or price looks wrong, check the linked card page and contact us with the card and the issue.