Bingo probabilities.
Clear rules. Verifiable answers.

Connect your agent

1. Install the skill. Download and extract the ZIP. Install the bingocalculator-probability folder using your agent's supported skill installation method. Keep SKILL.md and the agents and assets folders together.
2. Connect the MCP server. Add the endpoint below using Streamable HTTP. No API key is required. Some clients can use the included dependency metadata; others need a separate connection.
3. Load the tool and ask your question. Check that CalculateProbability is available, then specify your ticket type, winning requirement, and call interval.

Skill import and MCP setup depend on your client. The ZIP contains instructions and connection metadata, not a standalone calculator. A client that supports MCP alone can still call the service, but may not load the skill.

Try a question

For a 5x5, 75-ball card with no free space, what is the probability of completing an X for the first time on exactly call 30? Give me 1-in-N odds too.

The skill maps the X to nine predetermined cells and sets both interval boundaries to 30. Your agent calls Bingocalculator for the result.

What it supports

• 75-ball, 5x5, no free space: a single card or Variant with three boards and no repeated numbers across them.
• Winning requirements: one line in any allowed direction, one to five horizontal rows on the same board, or one predetermined pattern.
• First completion within an interval: “by call 12” differs from “first on call 12”. Both ends of the interval are included.
• Two result values: probability from 0 to 1 and odds expressed as 1 in N. An impossible event returns probability 0 and odds: null.

Free spaces, 90-ball, known previous draws, winning ahead of other players, and payout calculations are outside this version.

The service calculates with exact fractions internally and returns finite-precision JSON numbers. The skill guides agent behaviour; it does not enforce how every client uses the service.