Sports Rules MCP server

• offsideFree

  Work an offside call through the published decision procedure — association football under IFAB Law 11, or ice hockey under NHL Rule 83 — and return every step, not just the verdict. Use this for any "was that offside" question in either sport. The two rules are structurally OPPOSITE and are routinely conflated, and there are four specific things that get answered wrong: SOCCER: 1. HANDS AND ARMS DO NOT COUNT, for anyone including goalkeepers. Only parts that could legally score are measured, and the boundary is the bottom of the armpit. This tool REFUSES to compute from an arm position rather than guessing where the shoulder was. 2. AN OFFSIDE POSITION IS NOT AN OFFENCE. It becomes one only with involvement in active play. Do not report "he was offside" when the answer is that he was in an offside position and uninvolved. `involvement` is REQUIRED once the geometry makes it decisive — the tool errors rather than assuming, so ask the user what the player actually did, and pass "none" if the answer is nothing. 3. No offside offence direct from a throw-in, goal kick, or corner. Absolute. 4. A DELIBERATE play by an opponent resets it; a deflection or a save does NOT. This is the distinction most arguments turn on. HOCKEY: 5. SKATES decide it. Not the stick, not the body. 6. Since 2021 a skate in the AIR above the blue line is still onside — the line is a plane, and ice contact is irrelevant. BUT this does not apply to tagging up on a delayed offside, where the skate must contact the line. Do not generalise the 2021 change to tag-ups. Input for soccer: positions along the attacking axis in metres, larger being nearer the opponents’ goal line — `attacker`, `ball`, `secondLastDefender`. Any consistent scale works; only the order matters. Optionally `restart`, `foremostPart`, `inOwnHalf`, `involvement`, `lastTouch`. Input for hockey: `rearSkate` in centimetres relative to the LEADING EDGE of the blue line, negative being the neutral-zone side. Optionally `skateOnIce`, `situation` (zone-entry or tag-up), and `stick`. Returns: a verdict of offside, onside, or no-offside-offence — three outcomes, not two, because "in an offside position but no offence" is a real and common answer — plus every step with the decisive one flagged, warnings, and a disclaimer. THIS IS NOT AN OFFICIAL RULING. Relay the steps, not just the verdict: in a real call the procedure is the easy half and the inputs are the argument. Do not quote IFAB or NHL rule text; it is copyrighted and this tool does not reproduce it.

• offside_rule_contrastFree

  Return the structural differences between soccer offside and hockey offside, dimension by dimension. Use this when someone asks how the two compare, or when you are about to reason about one sport using an intuition from the other — which is the commonest way to get either wrong. They differ on what part of the player is measured, when the picture freezes, whether position alone is an offence, what happens at exactly level, what resets the situation, and which restarts are exempt. Takes no arguments. Returns the comparison table.

• –Code scanremote-only server, no package to scann/a
• Live reliabilityremote reachable in 1503ms20/20
• Tool poisoning2 tool descriptions checked13/15
• Auth qualityopen endpoint, read-only tools10/15
• Maintenancerepository not readable: repo not found3/15
• Maintainer identityendpoint served from the registry-verified namespace domain8/10

Safety score

72/100

higher than 37% of 48,243 servers

Tools

2

the typical server has 7

Tools that change things

0%

typical: 0%. Fewer write tools means less an agent can break

Uptime

100%

of our recent checks; the typical remote server answers 100%

Response time

932 ms

faster than 15% of 30,027 servers

Grade history

• 2026-10-16restoreC → Bscore 72: Unusually long tool description (over 2,000 characters)

Sports Rules: common questions

Is Sports Rules MCP server safe?

Mostly: it is graded B (72/100). Read the Sports Rules safety report

How do I install Sports Rules?

It runs remotely at sports-rules.gumballtools.com. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.

Does Sports Rules need an API key?

Not as far as the registry entry and our scan can tell: no credentials are declared or required.

Is Sports Rules maintained?

The latest release is v0.1.0.

Is Sports Rules up?

100% of our last 28 checks got an answer. We check remote servers about four times a day.

How does Sports Rules compare with other MCP servers?

safety score 72/100 (higher than 37% of 48,243 servers); tools 2 (the typical server has 7); tools that change things 0% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.